KR20200097863A - Receiving apparatus and method for detecting synchronization in 5g nr communication system - Google Patents

Abstract

The present invention relates to a receiving apparatus and a method for detecting synchronization in a 5G new radio (NR) communication system. An objective of the present invention is to lower hardware complexity in synchronization detection in a 5G NR communication system. According to the present invention, the receiving apparatus in a 5G NR communication system comprises: an analog-to-digital converter (ADC) to convert a signal received from a transmitting apparatus into a discrete signal; a signal capture unit to receive the discrete signal to detect primary synchronization signal (PSS) synchronization and capture and store an NR frame signal in which a synchronization signal block (SSB) exists; a time division duplex (TDD) configuration information acquisition unit to receive a sector ID signal and the captured NR frame signal from the signal capture unit to acquire TDD configuration information; and a switching signal generation unit to generate an uplink/downlink switching signal based on the TDD configuration information acquired from the TDD configuration information acquisition unit.

Description

Receiving device and synchronization detection method in 5G NR communication system {RECEIVING APPARATUS AND METHOD FOR DETECTING SYNCHRONIZATION IN 5G NR COMMUNICATION SYSTEM}

The invention 5G (5 ^th generation) relates to a receiving apparatus and a synchronous detection method in a communication system, in particular ^{5G NR (5 th Generation New Radio} ) synchronous detection and an uplink in a communication system to support high data transfer rates and It is about switching the downlink.

The 3rd Generation Partnership Project (3GPP) standardization organization is standardizing on NR (New Radio), a new wireless access technology, to overcome the limitations of 4G mobile communication based on Long Term Evolution (LTE). 5G NR integrates all wireless technologies and provides more functionality, enabling all industries and all things to be connected via 5G networks.

Unlike LTE, NR defines uplink/downlink resource allocation at a symbol level within one slot, and is designed to support a total of 256 slot formats. 3GPP TS 38.213 specifies the format of slot formats in 5G NR communication system.

In addition, in an NR system, a Synchronization Signal Block (SSB) may be transmitted outside the center of a system band, or a plurality of SSBs may be transmitted.

1 is a diagram illustrating an example of downlink and uplink between a base station (next-generation NodeB; gNB), a relay device, and a user terminal in a 5G NR wireless communication system. When a relay device is located between the gNB and the user terminal, the downlink means communication from the gNB to the user terminal (UE) via the relay device, and the uplink is from the user terminal (UE) to the gNB via the relay device. Means communication.

The relay device receives a signal from a base station (gNB) and obtains TDD (Time Division Duplex) configuration information from the received signal, and then knows the slot format based on the information, and can determine the uplink and downlink according to the slot format. It generates a signal to switch. Based on the uplink/downlink switching signal, the relay device transmits only the downlink signal to the user terminal (UE) in the downlink period and only the uplink signal to the base station (gNB) in the uplink period.

In order to generate an uplink/downlink switching signal as described above, it is necessary to detect PSS synchronization from a received signal to obtain TDD configuration information, but conventionally, the complexity of the time domain correlation is taken for PSS synchronization detection, so that the complexity is very high.

2017.6.6. Published U.S. Patent No. 9,674,808B1 (referred to as'priority document 1') proposes a synchronization detection technology in an LTE wireless communication system, and PSS detection is still performed between a time domain signal and a time domain local replica of three PSS candidates. It states that cross-correlation is used.

For example, if the sampling rate is 122.88MHz, the total number of samples during a 10ms frame is 1228800, and when time domain correlation by windowing is performed, a multiplier needs (number of samples of the frame signal) * (number of samples of the reference signal). Then, {(the number of samples of the frame signal) * (the number of samples of the reference signal) -1} is required as an adder. Therefore, according to the conventional method, a large amount of memory, a multiplier, an adder, etc. are required to detect synchronization, and the complexity is too high, and thus it is not easy to implement with a Digital Signal Processor (DSP) or an Advanced RISC Machine (ARM).

2018.10.15. Published Korean Patent Publication No. 10-2018-0112918 (referred to as'Prior Document 2') proposes a synchronization signal structure and a synchronization signal transmission/reception technology in a 5G NR communication system. In the meantime, it is disclosed that the received signal and the synchronization sequence candidate group are correlated. Prior Document 2 proposes a correlation in the frequency domain for synchronization detection, but it has high complexity because it still takes the correlation by windowing. Therefore, the technology according to Prior Document 2 can be implemented only by an ASIC (Application Specific Integrated Circuit) dedicated modem chip or a high-capacity field programmable gate array (FPGA).

Prior Document 1. U.S. Patent No. 9,674,808B1 (Publication date: June 6, 2017; Title of invention: METHOD AND APPARATUS FOR EARLY FREQUENCY SYNCHRONIZATION IN LTE WIRELESS COMMUNICATION SYSTEMS) Prior Document 2. Korean Patent Laid-Open Publication No. 10-2018-0112918 (Publication date: October 15, 2018; Title of invention: Synchronization signal structure suitable for 5G NR communication synchronization and method and apparatus for transmitting and receiving synchronization signals

The present invention intends to propose a method of detecting synchronization in an effective manner using less hardware resources in a 5G NR communication system. That is, an object of the present invention is to reduce hardware complexity in synchronization detection in a 5G NR communication system.

The technical problems to be solved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. Can be.

In order to solve the above technical problem, a receiving device in a 5G NR communication system according to an embodiment of the present invention includes: an analog-to-digital converter for converting a signal received from a transmitting device into a discrete signal. Converter; ADC); A signal capture unit configured to receive the discrete signal, detect primary synchronization signal (PSS) synchronization, and capture and store a new radio (NR) frame signal in which a synchronization signal block (SSB) exists; A TDD configuration information acquisition unit receiving a sector ID signal and a captured NR frame signal from the signal capture unit to obtain time division duplex (TDD) configuration information; And a switching signal generator that generates an uplink/downlink switching signal based on the TDD configuration information obtained from the TDD configuration information acquisition unit.

According to an embodiment of the present invention, the signal capture unit includes: a block frequency domain correlation part for detecting PSS synchronization by correlating the discrete signal with a time domain PSS reference signal; And an NR frame signal capture unit for capturing and storing an NR frame signal in which an SSB exists based on the discrete signal and a capture time output from the PSS synchronization detection block frequency domain correlation unit.

According to an embodiment of the present invention, the block frequency domain correlation unit for PSS synchronization detection: takes a block as much as an N-point length as a reference with respect to the discrete signal, and zero padding to have a length of 2N-points. A first FFT converter for transforming into a frequency domain signal by performing FFT (Fast Fourier Transform) transformation; A second FFT converter for converting the time domain PSS reference signal into a frequency domain signal by performing FFT conversion after zero padding to a length of 2N-points; A multiplier for multiplying the FFT-transformed discrete signal and the FFT-transformed time domain PSS reference signal by taking a loop by an integer corresponding to (frame length)/(N-point); An IFFT converter for converting the signal output from the multiplier into a time domain signal by performing Inverse Fast Fourier Transform (IFFT) transformation again; And a signal selector for selecting a signal in a section excluding a signal overlapped between blocks in the time domain signal output from the IFFT converter, wherein the time domain PSS reference signal is an IFFT-transformed PSS candidate sequence in the frequency domain. As a signal, it may be stored in the receiving device.

According to an embodiment of the present invention, the TDD configuration information acquisition unit: A block frequency domain PSS correlator for checking a sector ID; A block frequency domain Secondary Synchronization Signal (SSS) correlator for detecting a cell ID; An SSB location detector configured to detect a location of a Synchronization Signal Block (SSB) based on the detected cell ID; An MIB acquisition unit that demodulates and decodes a physical broadcast channel (PBCH) corresponding to an SSB to obtain a master information block (MIB); And an SIB acquisition unit configured to obtain a System Information Block (SIB) by checking the location information of a Physical Downlink Control Channel (PDCCH) from the MIB, demodulating and decoding the PDCCH.

A synchronization detection method in a 5G NR communication system according to an embodiment of the present invention includes: converting a signal received from a transmitting device into a discrete signal; A signal capturing step of receiving the discrete signal, detecting PSS (Primary Synchronization Signal) synchronization, and capturing and storing a New Radio (NR) frame signal in which a Synchronization Signal Block (SSB) exists; And obtaining TDD configuration information by receiving the sector ID signal and the captured NR frame signal from the signal capturing step to obtain time division duplex (TDD) configuration information.

According to an embodiment of the present invention, the signal capturing step is: A PSS synchronization detection step of correlating the discrete signal and a time domain PSS reference signal to detect PSS synchronization; And capturing and storing an NR frame signal in which an SSB exists based on the discrete signal and the detected PSS synchronization, wherein the PSS synchronization detection step includes block frequency domain correlation. ), PSS synchronization can be detected.

According to an embodiment of the present invention, the step of detecting PSS synchronization includes: taking a block for the discrete signal by a length of N-point as a reference, and performing zero padding to have a length of 2N-point, A first FFT transform step of transforming a fast Fourier transform (FFT) into a frequency domain signal; A second FFT transform step of performing zero padding with respect to the time domain PSS reference signal to a length of 2N-points, performing FFT conversion, and converting the signal into a frequency domain signal; A multiplication step of multiplying the FFT-transformed discrete signal and the FFT-transformed time domain PSS reference signal by taking a loop by an integer corresponding to (frame length)/(N-point); An IFFT transform step of converting the signal multiplied in the multiplication step into a time domain signal by performing Inverse Fast Fourier Transform (IFFT) transformation; And a signal selection step of selecting a signal in a section excluding a signal overlapped between blocks in the IFFT-transformed time domain signal, wherein the time domain PSS reference signal is a signal obtained by IFFT-converting a PSS candidate sequence in a frequency domain May correspond to.

According to an embodiment of the present invention, the step of obtaining the TDD configuration information is: A sector ID verification step of performing block frequency domain PSS correlation to verify the sector ID; Cell ID detection step of performing block frequency domain Secondary Synchronization Signal (SSS) correlation for detecting cell ID; SSB location detection step of detecting a location of a Synchronization Signal Block (SSB) based on the detected cell ID; An MIB acquisition step of demodulating and decoding a Physical Broadcast Channel (PBCH) corresponding to an SSB to obtain a Master Information Block (MIB); And a SIB acquisition step of acquiring a System Information Block (SIB) by checking the location information of a Physical Downlink Control Channel (PDCCH) from the MIB, demodulating and decoding the PDCCH.

The present invention has an effect of detecting synchronization in an effective manner while using a small amount of memory or a multiplier in detecting synchronization in a 5G NR communication system. Accordingly, according to the present invention, synchronization detection in a 5G NR communication system can be implemented in an inexpensive DSP or ARM.

1 is a diagram illustrating an example of a downlink and an uplink between a base station, a relay device, and a user terminal in a 5G NR wireless communication system.
2 is a schematic diagram showing the configuration of a reception device in a 5G NR communication system according to an embodiment of the present invention.
3 is a schematic diagram showing a configuration of a signal capture unit of a reception device in a 5G NR communication system according to an embodiment of the present invention.
4 is a schematic diagram showing the configuration of a block frequency domain correlation unit for PSS synchronization detection of a reception device in a 5G NR communication system according to an embodiment of the present invention.
5 is a schematic diagram showing a configuration of a TDD configuration information acquisition unit of a reception device in a 5G NR communication system according to an embodiment of the present invention.
6 shows an example of a downlink switching signal and an uplink switching signal according to a slot format.
7 is a flowchart of a method for detecting synchronization in a 5G NR communication system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the gist of the present invention are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar components throughout the specification.

2 is a schematic diagram showing the configuration of a reception device in a 5G NR communication system according to an embodiment of the present invention. Hereinafter, the receiving device will be described based on an embodiment in which the receiving device is a relay device in a 5G NR communication system. However, the receiving device is not limited only to the relay device, and may be a user terminal that performs synchronization detection.

A receiving apparatus in a 5G NR communication system according to an embodiment of the present invention obtains TDD configuration information from a signal received from a base station and generates an uplink/downlink switching signal based on the information. In order to generate such an uplink/downlink switching signal, a reception device in a 5G NR communication system according to an embodiment of the present invention includes an analog-to-digital converter (ADC) 100 and a signal capture device. It includes a unit 200, a TDD configuration information acquisition unit 300, and a switching signal generation unit 400.

The ADC 100 may convert a signal received from the base station into a discrete signal.

The signal capture unit 200 may receive a discrete signal from the ADC 100 to capture and store a New Radio (NR) frame signal in which a Synchronization Signal Block (SSB) exists. The signal capture unit 200 will be described in more detail below with reference to FIG. 3.

The TDD configuration information acquisition unit 300 may receive a sector ID signal and a captured NR frame signal from the signal capture unit 200 to obtain time division duplex (TDD) configuration information. The TDD configuration information acquisition unit 300 will be described in more detail below with reference to FIG. 5.

The switching signal generation unit 400 may generate an uplink/downlink switching signal based on the TDD configuration information obtained from the TDD configuration information acquisition unit 300. 6 shows, for example, a downlink switching signal and an uplink switching signal when the TDD configuration information corresponds to No. 43 in a slot format. The relay device transmits only the downlink signal to the user terminal (UE) in the downlink switching on period using such uplink/downlink switching signals, and transmits only the uplink signal to the base station (gNB) in the uplink switching on period.

Hereinafter, the configuration and operation of the signal capture unit 200 will be described in detail with reference to FIGS. 3 and 4. As illustrated in FIG. 3, the signal capture unit 200 correlates the discrete signal received from the ADC 100 with a time domain Primary Synchronization Signal (PSS) reference signal to detect PSS synchronization. Capturing and storing an NR frame signal in which SSB exists based on the capture time output from the block frequency domain correlation part 210 and the discrete signal and the PSS synchronization detection block frequency domain correlation part 210 It may include an NR frame signal capture unit 220. The time domain PSS reference signal is a signal obtained by IFFT-converting the PSS candidate group sequence in the frequency domain, and has a total of three types corresponding to sectors α, β, and γ, and is previously stored in the memory of the receiving device. The capture time is determined by the detected PSS synchronization.

Conventionally, in order to detect PSS synchronization, a time domain correlator was used to correlate each sample of a frame signal and a reference signal while windowing, so too much memory and a multiplier were required, and the hardware complexity was quite high. There was a problem that the time was too long and took up to several minutes. In order to solve this problem, the present invention uses block frequency domain correlation when detecting PSS synchronization.

A schematic configuration of the block frequency domain correlation unit 210 for PSS synchronization detection is illustrated in FIG. 4. The block frequency domain correlation unit 210 for PSS synchronization detection takes a block as much as the length of N-point as a reference for the discrete signal output from the ADC 100 and applies zero padding to the length of 2N-point. Then, the FFT (Fast Fourier Transform) transforms the first FFT converter 211 to convert the signal into a frequency domain signal, zero padding with respect to the time domain PSS reference signal to a length of 2N-points, and then FFT transforms the frequency domain signal. A second FFT converter 212 for converting into, a multiplier 213 for multiplying the FFT-converted discrete signal and the FFT-converted time domain PSS reference signal by taking a loop by an integer corresponding to (frame length)/(N-point), An IFFT converter 214 that converts the signal output from the multiplier 213 back into a time domain signal by inverse Fast Fourier Transform (IFFT) transformation, and a signal superimposed between blocks in the time domain signal output from the IFFT converter 214 It includes a signal selector 215 for selecting a signal of the excluded section.

Taking the block frequency domain correlation method like this, {3*(N-point length)*log ₂ (2N-point length)+(2N-point length)}*{(frame length)/(N-point length)} As many multipliers are required, the number of multipliers can be remarkably reduced, and thus, it is possible to implement it in a DSP or ARM having a small amount of hardware resources.

5 is a schematic diagram showing a configuration of a TDD configuration information acquisition unit 300 of a reception device in a 5G NR communication system according to an embodiment of the present invention.

TDD configuration information acquisition unit 300 is a block frequency domain PSS correlation unit 310, block frequency domain SSS (Secondary Synchronization Signal) correlation unit 320, SSB position detection unit 330, MIB acquisition unit 340 and SIB acquisition Includes part 350.

The block frequency domain PSS correlation unit 310 is a component for confirming the sector ID, and the NR frame signal captured from the NR frame signal capture unit 220 and the block frequency domain correlation unit 210 for PSS detection as a reference signal Except for receiving and correlating the sector ID signal (ie, one PSS candidate group) output from the PSS, it includes the same components as the PSS detection block frequency domain correlation unit 210 and operates in the same manner. That is, the block frequency domain PSS correlator 310 receives the captured NR frame signal from the signal capture unit 200, takes a block as much as the length of the N-point as a reference, and pads it with zero to have a length of 2N-points. After FFT conversion and conversion into a frequency domain signal, a sector ID signal is received, zero padding to a length of 2N-points, FFT conversion is performed and converted into a frequency domain signal, and the FFT-converted NR frame signal and sector ID signal are converted to (frame length )/(N-point) by taking and multiplying by an integer number of loops, converting the multiplied signal back to IFFT to convert it into a time domain signal, and then converting the signal in the section excluding the signal overlapped between blocks in the time domain signal. It works the way you choose.

The block frequency domain SSS correlation unit 320 is a component for detecting a cell ID, and IFFT transforms the NR frame signal captured from the NR frame signal capture unit 220 and the SSS candidate group sequence in the frequency domain as a reference signal. Except for correlating the time domain SSS reference signal stored as a signal, it includes the same components as the block frequency domain correlator 210 for PSS detection described above and operates in the same manner. That is, the block frequency domain SSS correlation unit 320 receives the NR frame signal captured from the signal capture unit 200, takes a block as much as the length of the N-point as a reference, and pads it with zero to have a length of 2N-points. FFT transform to convert to frequency domain signal, zero padding to 2N-point length with respect to time domain SSS reference signal, FFT conversion to convert to frequency domain signal, FFT-converted NR frame signal and time domain SSS reference signal Is multiplied by taking a loop by an integer corresponding to (frame length)/(N-point), and converting the multiplied signal to a time domain signal by IFFT conversion, and then excluding the signal overlapped between blocks in the time domain signal. It works by selecting the signal of the section. For reference, the time domain SSS reference signal in 5G NR has 336 candidate groups.

The SSB location detection unit 330 detects the location of a Synchronization Signal Block (SSB) based on the detected cell ID. For reference, SSB is a combination of OFDM symbols composed of PSS, SSS, PBCH-DMRS (Physical Broadcast Channel-DeModulation Reference Signal), and PBCH (Physical Broadcast Channel).

The MIB acquisition unit 340 demodulates and decodes a PBCH (Physical Broadcast Channel) corresponding to the SSB (eg, polar decoding) to obtain a Master Information Block (MIB).

The SIB acquisition unit 350 checks the position information of the Physical Downlink Control Channel (PDCCH) from the MIB obtained from the MIB acquisition unit 340, demodulates and decodes the PDCCH (e.g., LDPC (Low Density Parity Check) decoding) Acquires a System Information Block (SIB) as TDD configuration information. Here, SIB specifically corresponds to SIB1.

7 is a flowchart of a method for detecting synchronization in a 5G NR communication system according to an embodiment of the present invention.

The synchronization detection method according to the present invention includes the step of converting a signal received from a transmitting device into a discrete signal (S100), detecting PSS (Primary Synchronization Signal) synchronization by receiving a discrete signal, and NR with a Synchronization Signal Block (SSB). (New Radio) A signal capture step (S200) of capturing and storing a frame signal, and a sector ID signal and a captured NR frame signal from the signal capturing step (S200) are received to obtain Time Division Duplex (TDD) configuration information. It may include the step of obtaining TDD configuration information (S300).

The signal capture step (S200) is a PSS synchronization detection step of detecting PSS synchronization by correlating a discrete signal and a time domain PSS reference signal by a block frequency domain correlation method, and the detected PSS synchronization with the discrete signal. The NR frame signal capturing step of capturing and storing the NR frame signal in which the SSB exists based on the SSB may be included.

In the PSS synchronization detection step, a block is taken for the discrete signal by the length of the N-point as a reference, zero padding is performed to have a length of 2N-points, and then FFT (Fast Fourier Transform) transformation is performed in the frequency domain. A first FFT conversion step of converting a signal into a signal, a second FFT conversion step of converting the time domain PSS reference signal into a frequency domain signal by performing zero padding to have a length of 2N-points and performing FFT conversion; A multiplication step in which the FFT-transformed discrete signal and the time domain PSS reference signal are multiplied by taking a loop by an integer corresponding to (frame length)/(N-point), and the signal multiplied in the multiplication step is again Inverse Fast Fourier Transform (IFFT) An IFFT conversion step 2130 of converting and converting the signal into a time domain signal, and a signal selection step of selecting a signal of a section excluding a signal overlapping between blocks in the IFFT-transformed time domain signal.

In the step of obtaining TDD configuration information (S300), a sector ID checking step of performing block frequency domain PSS correlation to check a sector ID, and a cell ID performing block frequency domain Secondary Synchronization Signal (SSS) correlation to detect cell ID Detection step, SSB position detection step of detecting the position of the Synchronization Signal Block (SSB) based on the detected cell ID, demodulation and decoding of the PBCH (Physical Broadcast Channel) corresponding to the SSB to obtain a MIB (Master Information Block) It may include an MIB acquisition step and an SIB acquisition step of acquiring a System Information Block (SIB) by checking the location information of a Physical Downlink Control Channel (PDCCH) from the MIB, demodulating and decoding the PDCCH.

In the above description, each component is described as a separate component, but all of them may be combined into one component to function, or only some components may be combined to function. However, as long as the above-described functions are performed, all belong to the scope of the present invention.

Since the above embodiments are only the most basic examples of the present invention, it should not be understood that the present invention is limited only to the above embodiments, and the scope of the present invention is understood as the claims and their equivalents to be described later. You will have to lose.

100 ADC
200 signal capture unit
210 PSS detection block frequency domain correlation unit
211 first FFT converter
212 second FFT converter
213 Multiplier
214 IFFT converter
215 signal selector
220NR frame signal capture unit
300 TDD configuration information acquisition unit
310 block frequency domain PSS correlator
320 block frequency domain SSS correlation unit
330 SSB position detection unit
340 MIB acquisition unit
350 SIB acquisition unit
400 switching signal generator

Claims (8)

As a receiving device in a 5G NR communication system,
An analog-to-digital converter (ADC) for converting a signal received from a transmitting device into a discrete signal;
A signal capture unit configured to receive the discrete signal, detect primary synchronization signal (PSS) synchronization, and capture and store a new radio (NR) frame signal in which a synchronization signal block (SSB) exists;
A TDD configuration information acquisition unit receiving a sector ID signal and a captured NR frame signal from the signal capture unit to obtain time division duplex (TDD) configuration information; And
A switching signal generation unit that generates an uplink/downlink switching signal based on the TDD configuration information obtained from the TDD configuration information acquisition unit
Including
Receiving device in 5G NR communication system. The method of claim 1,
The signal capture unit:
A block frequency domain correlation part for detecting PSS synchronization by correlating the discrete signal with a time domain PSS reference signal; And
An NR frame signal capture unit that captures and stores an NR frame signal in which an SSB exists based on the discrete signal and the capture time output from the PSS synchronization detection block frequency domain correlation unit
Including
Receiving device in 5G NR communication system. The method of claim 2,
The PSS synchronization detection block frequency domain correlation unit:
A first for converting the discrete signal into a frequency domain signal by taking a block as much as the length of the N-point as a reference, zero padding so that the length of 2N-points, and then transforming into a frequency domain signal by FFT (Fast Fourier Transform) transformation. FFT converter;
A second FFT converter for converting the time domain PSS reference signal into a frequency domain signal by performing FFT conversion after zero padding to a length of 2N-points;
A multiplier for multiplying the FFT-transformed discrete signal and the FFT-transformed time domain PSS reference signal by taking a loop by an integer corresponding to (frame length)/(N-point length);
An IFFT converter for converting the signal output from the multiplier into a time domain signal by performing Inverse Fast Fourier Transform (IFFT) transformation again; And
A signal selector for selecting a signal in a section excluding a signal overlapped between blocks from the time domain signal output from the IFFT converter
Including,
The time domain PSS reference signal is an IFFT-converted signal of a PSS candidate group sequence in the frequency domain and is stored in the receiving device.
Receiving device in 5G NR communication system. The method of claim 3,
The TDD configuration information acquisition unit:
A block frequency domain PSS correlator for checking a sector ID;
A block frequency domain Secondary Synchronization Signal (SSS) correlator for detecting a cell ID;
An SSB location detector configured to detect a location of a Synchronization Signal Block (SSB) based on the detected cell ID;
An MIB acquisition unit that demodulates and decodes a physical broadcast channel (PBCH) corresponding to an SSB to obtain a master information block (MIB); And
SIB acquisition unit that obtains SIB (System Information Block) by demodulating and decoding the PDCCH by checking the location information of the PDCCH (Physical Downlink Control Channel) from the MIB
Including
Receiving device in 5G NR communication system. As a synchronization detection method in a 5G NR communication system,
Converting the signal received from the transmitting device into a discrete signal;
A signal capturing step of receiving the discrete signal, detecting PSS (Primary Synchronization Signal) synchronization, and capturing and storing a New Radio (NR) frame signal in which a Synchronization Signal Block (SSB) exists; And
TDD configuration information acquisition step of acquiring time division duplex (TDD) configuration information by receiving the sector ID signal and the captured NR frame signal from the signal capturing step
Including
Synchronization detection method in 5G NR communication system. The method of claim 5,
The signal capture step is:
A PSS synchronization detection step of correlating the discrete signal and a time domain PSS reference signal to detect PSS synchronization; And
NR frame signal capture step of capturing and storing an NR frame signal in which an SSB exists based on the discrete signal and the detected PSS synchronization
Including,
In the PSS synchronization detection step, PSS synchronization is detected by a block frequency domain correlation method,
Synchronization detection method in 5G NR communication system. The method of claim 6,
The PSS synchronization detection step:
A first for converting the discrete signal into a frequency domain signal by taking a block as much as the length of the N-point as a reference, zero padding so that the length of 2N-points, and then transforming into a frequency domain signal by FFT (Fast Fourier Transform) transformation. FFT transform step;
A second FFT transform step of performing zero padding with respect to the time domain PSS reference signal to a length of 2N-points, performing FFT conversion, and converting the signal into a frequency domain signal;
A multiplication step of multiplying the FFT-transformed discrete signal and the FFT-transformed time domain PSS reference signal by taking a loop by an integer corresponding to (frame length)/(N-point);
An IFFT transform step of converting the signal multiplied in the multiplication step into a time domain signal by performing Inverse Fast Fourier Transform (IFFT) transformation again; And
A signal selection step of selecting a signal in a section excluding signals overlapped between blocks in the IFFT-transformed time domain signal
Including,
The time domain PSS reference signal corresponds to a signal obtained by IFFT-transforming the PSS candidate group sequence in the frequency domain.
Synchronization detection method in 5G NR communication system. The method of claim 7,
The step of obtaining the TDD configuration information is:
A sector ID verification step of performing block frequency domain PSS correlation to verify the sector ID;
Cell ID detection step of performing block frequency domain Secondary Synchronization Signal (SSS) correlation for detecting cell ID;
SSB location detection step of detecting a location of a Synchronization Signal Block (SSB) based on the detected cell ID;
An MIB acquisition step of demodulating and decoding a Physical Broadcast Channel (PBCH) corresponding to an SSB to obtain a Master Information Block (MIB); And
SIB acquisition step of acquiring a system information block (SIB) by demodulating and decoding the PDCCH by checking the location information of the physical downlink control channel (PDCCH) from the MIB
Including
Synchronization detection method in 5G NR communication system.

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