CN115877417A - Method for realizing ultralow standby power consumption of Beidou satellite navigation chip level - Google Patents

Abstract

The invention discloses a Beidou satellite navigation chip-level ultra-low standby power consumption method, which belongs to the technical field of chip standby power consumption.

Description

A method for Beidou satellite navigation chip-level ultra-low standby power consumption

technical field

The invention relates to the technical field of chip standby power consumption, and more specifically, relates to a method for ultra-low standby power consumption at the chip level of Beidou satellite navigation.

Background technique

With the miniaturization and even chipping of satellite navigation and positioning equipment, the market for mobile navigation products with personalized mobile information as the core is becoming more and more extensive, and various embedded electronic products are becoming more and more abundant. Integrated satellite positioning and mobile communication components The mobile terminal products will be developed rapidly. In the mobile terminal, the power consumption of the mobile terminal must be considered. Therefore, the market demand for low-power navigation chips is very large. The development of self-developed low-power receiver chips, whether for Both the development of navigation satellite system and receiver equipment have important strategic significance and market value.

During the operation of the satellite navigation chip, the main processor processes the received satellite signals, and its signal capture, tracking and positioning calculation are all completed in the main processor, and its design is highly flexible, but In the middle of the calculation process, a large amount of computing resources of the main processor are consumed, and the power consumption is relatively large. When the low-power operation mode is activated, the main processor needs to be turned off, so that the main processor cannot solve the received satellite signals.

Therefore, in view of the above problems, a method of Beidou satellite navigation chip level ultra-low standby power consumption is proposed.

Contents of the invention

1. Technical problems to be solved

Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a method for Beidou satellite navigation chip-level ultra-low standby power consumption, which can eliminate the need to consume a large amount of computing resources of the main processor during the calculation process and cause the main The processor consumes a lot of power, and when the main processor is turned off in the low-power operation mode, the received satellite signal can also be calculated through an external positioning and navigation calculation processing module.

2. Technical solution

In order to solve the above problems, the present invention adopts the following technical solutions.

A method for Beidou satellite navigation chip level ultra-low standby power consumption, comprising the following steps:

S1: The RF front-end module in the main processor realizes the capture of the satellite signal, and accumulates the received data by loading the correlator module, and stores it in the register module;

S2: The navigation baseband digital signal module in the main processor corrects the frequency points of multiple related processing modules, and detects them after the correction is completed;

S3: After the detection is completed, the positioning calculation and navigation are performed on the data in the register through the positioning and navigation calculation processing module external to the main processor;

S4: After the RF front-end module captures enough satellite signals, it shuts down the main processor engine, and after the calculation of the positioning and navigation calculation processing module is completed, the chip enters the automatic sleep mode.

Further, the main processor circuit on the chip in the S1 can be designed using a thick gate oxide crystal with extremely low leakage power consumption, and a crystal oscillator circuit with extremely low power consumption is designed to ensure that it can operate at an extremely low standby time. state can wake up the main processor to run.

Further, the RF front-end module in S1 captures the received satellite signals on a large scale, accumulates the obtained satellite signals through a correlator, and then sends them to the register module.

Further, the navigation baseband digital signal module in S2 adjusts the frequency points of multiple related processing modules through the navigation baseband digital signal module after the radio frequency front-end module captures satellite signals on a large scale, so as to realize the central frequency of multiple related processing modules, As a result, a plurality of related processing modules are operated with low power, and after the adjustment is completed, the corrected center frequency is detected.

Further, the multiple related processor channels in S2 may include a carrier NCO, a code NCO, a multifunctional spreading code generator, a digital mixer and related units.

Further, the positioning and navigation calculation processing module in S3 can adopt a pipeline mode when calculating the satellite signals stored in the register, and distribute the next satellite signal when performing the calculation.

Further, in said S4, when the radio frequency front-end module can automatically disconnect the main processor running engine after capturing enough satellite signals, and when the satellite signal in the register is independently resolved by the external navigation calculation processing module, it will The satellite signal is transmitted to the user interface through the general-purpose CPU running the user program.

Further, in said S4, when the main processor completes the dormancy, the main processor and multiple related processors are in the dormant state, and only the external navigation calculation processing module runs. When the main processor needs to be woken up, the main processor can be interrupted. The navigation computing processing module wakes up.

3. Beneficial effect

Compared with the prior art, the present invention has the advantages of:

(1) In this solution, an independent navigation calculation processing module is connected to the main processor. Compared with the traditional way of receiving satellite signals through the main processor, the external independent mode is used to ensure low-power operation of the main processor. In this state, the positioning and navigation module can also be used to solve the satellite signals stored in the positive register, so as to realize the low-power operation of the chip, and at the same time to solve the stored data, and adjust the multiple signals through the navigation baseband digital signal module. frequency points of related processing modules, so that other related processing modules can also operate with low power. When the main processor enters the dormant state, the navigation calculation processing module can be interrupted to solve satellite signals, thereby waking up the main processor to run and restore the normal power Running, it is beneficial to not need to consume a lot of computing resources of the main processor in the middle of the calculation process, resulting in high power consumption of the main processor, and when the low power operation mode is turned off and the main processor is turned off, it can also be processed through external positioning and navigation calculations The module solves the received satellite signal.

(2) In this solution, the navigation calculation processing module is quickly turned on and works continuously under the control of the main processor to achieve the purpose of saving circuit resources and reducing system power consumption. After enough satellites are captured and positioned, the processor turns off the capture engine . After the calculation is completed, the navigation calculation processing module automatically enters the sleep mode to realize low-power operation. In the way of waking it up, the navigation calculation processing module can be interrupted to wake up, so that the main processor can continue to work.

Description of drawings

Figure 1 is a schematic diagram of the method of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only part of the embodiments of the present invention, not all embodiments, based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom" etc. are based on the orientations shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "set with", "sleeved/connected", "connected", etc. should be understood in a broad sense, such as " Connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal connection between two components. connectivity. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1:

Please refer to Figure 1, a method for Beidou satellite navigation chip-level ultra-low standby power consumption, including the following steps:

S1: The RF front-end module in the main processor realizes the capture of the satellite signal, and accumulates the received data by loading the correlator module, and stores it in the register module;

S2: The navigation baseband digital signal module in the main processor corrects the frequency points of multiple related processing modules, and detects them after the correction is completed;

S3: After the detection is completed, the positioning calculation and navigation are performed on the data in the register through the positioning and navigation calculation processing module external to the main processor;

S4: After the RF front-end module captures enough satellite signals, it shuts down the main processor engine, and after the calculation of the positioning and navigation calculation processing module is completed, the chip enters the automatic sleep mode.

In this solution, an independent navigation calculation processing module is connected to the main processor. Compared with the traditional way of receiving satellite signals through the main processor, the external independent mode is used to ensure that the main processor is in the low-power operating state. It is also possible to solve the satellite signals stored in the positive register through the positioning and navigation module, so as to realize the low-power operation of the chip and at the same time solve the stored data, and adjust multiple related processes through the navigation baseband digital signal module Module frequency, so that other related processing modules can also run at low power. When the main processor enters the dormant state, the navigation calculation processing module can be interrupted to solve the satellite signal, thereby waking up the main processor to resume normal power operation. In the middle of the calculation process, it does not need to consume a large amount of computing resources of the main processor, resulting in a large power consumption of the main processor, and when the main processor is turned off in the low-power operation mode, the external positioning and navigation calculation processing module can also be connected to the receiver. The satellite signal is solved.

The main processor circuit on the chip in S1 can be designed with a thick gate oxide crystal with extremely low leakage power consumption, and a crystal oscillator circuit with extremely low power consumption is designed to ensure that the main processor can be woken up in an extremely low standby state. The processor is running.

In this solution, the main processor circuit on the chip in S1 can be designed with a thick gate oxide crystal with extremely low leakage power consumption. Since the main processor circuit is prone to hidden dangers of leakage during low-power operation, the thick gate oxide The design of crystal material characteristics reduces the potential safety hazard of the main processor under extremely low power operation. At the same time, a crystal oscillator circuit with extremely low power consumption is designed, so that the main processor can be woken up by controlling the crystal oscillator circuit to interrupt the navigation calculation processing module. Woke up from hibernation.

The RF front-end module in S1 captures the received satellite signals on a large scale, accumulates the obtained satellite signals by loading the correlator, and then sends them to the register module.

This solution uses the RF front-end module to perform large-scale parallel capture of the digital intermediate frequency signal in the input satellite signal, obtains the initial phase and frequency information of the navigation signal and sends it to the loading correlator, and the loading correlator completes the carrier wave of the corresponding phase and frequency point. Data is accumulated and stored in registers.

The navigation baseband digital signal module in S2 adjusts the frequency points of multiple related processing modules through the navigation baseband digital signal module after the radio frequency front-end module captures satellite signals on a large scale, so as to realize the central frequency of multiple related processing modules, resulting in multiple related processing modules. The processing module operates at low power, and detects its corrected center frequency after the adjustment is completed.

In this solution, the navigation baseband digital signal module is quickly turned on and works continuously under the control of the main processor, so as to ensure that the code phase value and frequency point information corresponding to several peak values obtained by the operation of the RF front-end module are quickly allocated to a correlator channel, continuously Completing coherent processing and non-coherent processing and closing idle channels can not only quickly and accurately capture satellite signals, but also efficiently coordinate and multiplex the channels of multiple correlator modules to achieve the purpose of saving circuit resources and reducing system power consumption.

Multiple related processor channels in S2 may include carrier NCO, code NCO, multifunctional spread spectrum code generator, digital mixer and related units.

In this solution, the carrier frequency wave in different satellite navigation systems can be realized through the carrier NCO module. The carrier stripping module performs carrier stripping on the digital intermediate frequency signal and converts it to the baseband. The code NCO module is a pseudo-code clock for different satellite navigation systems. Code despreading module, the baseband IQ data enters the code despreading module and strips the pseudo-random code to obtain a single carrier signal, the accumulator module, the single carrier signal after code stripping has 3 channels: advance (E), instant (P) and lag (L), the 3-way signals are accumulated respectively, and the local pseudo code generator module cooperates with the processor to generate the local pseudo code according to the pseudo code characteristics of different satellite navigation systems.

The positioning and navigation calculation processing module in S3 can adopt the pipeline mode when calculating the satellite signal stored in the register, and distribute the next satellite signal when performing the calculation.

In this scheme, the main processor performs pipeline scheduling on the RF front-end module and the multi-channel correlator, and at the same time distributes the satellite signal of the next fast capture module. The main processor performs fast detection algorithm processing on the data given by the correlator channel, and finally realizes the The navigation signal is quickly and accurately captured, and the correlator channels are efficiently and coordinated to achieve the purpose of saving circuit resources and reducing system power consumption.

In S4, when the RF front-end module can automatically disconnect the running engine of the main processor after capturing enough satellite signals, and the external navigation calculation processing module independently solves the satellite signals in the register, the satellite signals after the calculation are completed through the general The CUP runs the user program to realize the transmission to the user interface.

In this solution, the independent navigation chip is suitable for integration into the mobile phone, and the main processor of the mobile phone can be used as an external processor. The most important thing is that the power consumption of the independent baseband structure is very low, which is suitable for handheld devices.

In S4, when the main processor finishes dormancy, the main processor and multiple related processors are in a dormant state, and only the external navigation calculation processing module runs. When the main processor needs to be woken up, it can be woken up by interrupting the navigation calculation processing module .

In this solution, the navigation calculation processing module is quickly turned on and works continuously under the control of the main processor to achieve the purpose of saving circuit resources and reducing system power consumption. After enough satellites are captured and positioned, the processor turns off the capture engine. After the calculation is completed, the navigation calculation processing module automatically enters the sleep mode to realize low-power operation. In the way of waking it up, the navigation calculation processing module can be interrupted to wake up, so that the main processor can continue to work.

The above description is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention and its improved concept to make equivalent replacements or changes shall fall within the scope of protection of the present invention.

Claims (8)

1. A method for Beidou satellite navigation chip-level ultralow standby power consumption is characterized by comprising the following steps: comprises the following steps;

s1, a radio frequency front end module in a main processor captures satellite signals, accumulates the received data through a loading correlator module and stores the accumulated data in a register module;

s2, the navigation baseband digital signal module in the main processor corrects a plurality of related processing module frequency points, and detects the frequency points after the correction is finished;

s3, after detection is finished, positioning calculation and navigation are carried out on the data in the register through a positioning navigation calculation processing module externally connected with the main processor;

s4: after the radio frequency front-end module captures enough satellite signals, the main processor engine is closed, and after the positioning navigation calculation processing module finishes resolving, the chip enters an automatic sleep mode.

2. The method of claim 1, wherein the method comprises the following steps: the on-chip main processor circuit in the S1 can be designed by adopting a thick gate oxide crystal with extremely low leakage power consumption, and a crystal oscillator circuit with extremely low power consumption operation is designed, so that the main processor can be awakened to operate in an extremely low standby state.

3. The method of claim 1, wherein the method comprises the following steps: and the radio frequency front-end module in the S1 captures the received satellite signals in a large scale, accumulates the obtained satellite signals through a correlator and then sends the satellite signals to the register module.

4. The method of claim 1, wherein the method comprises the following steps: in S2, after the navigation baseband digital signal module captures satellite signals in a large scale through the radio frequency front end module, the navigation baseband digital signal module adjusts the frequency points of the plurality of relevant processing modules, so that the central frequencies of the plurality of relevant processing modules are realized, the plurality of relevant processing modules are enabled to run at low power, and the corrected central frequencies are detected after adjustment is completed.

5. The method of claim 1, wherein the method comprises the following steps: a carrier NCO, code NCO, multifunctional spreading code generator, digital mixer, and correlation units may be included in the S2 plurality of correlated processor channels.

6. The method of claim 1, wherein the method comprises the following steps: and in the S3, the positioning navigation calculation processing module can adopt a pipeline mode when resolving the satellite signals stored in the register, and can distribute the next satellite signal when resolving.

7. The method for Beidou satellite navigation chip-level ultralow standby power consumption according to claim 1, characterized in that: in S4, when the radio frequency front-end module can automatically disconnect the main processor to operate the engine after capturing enough satellite signals and the external navigation computation processing module independently resolves the satellite signals in the register, the resolved satellite signals are transmitted to the user interface through the general CUP operation user program.

8. The method of claim 1, wherein the method comprises the following steps: in S4, when the main processor finishes dormancy, the main processor and a plurality of related processors are in dormant states, only the external navigation computation processing module runs, and when the main processor needs to be awakened, the navigation computation processing module can be interrupted to awaken.

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