RU2002109590A - SYSTEM AND METHOD FOR PRECISE Prediction of SIGNAL TO INTERFERENCE AND NOISE RATIO FOR IMPROVEMENT OF COMMUNICATION SYSTEM FUNCTIONING - Google Patents

Claims (27)

1. A system for accurately predicting the signal-to-noise ratio and noise figure, comprising: means for receiving a signal transmitted over a channel from a transmitter; means for generating a sequence of estimates of the signal-to-noise ratio and noise figure based on the received signal; means for determining the relationship between the ratings of said sequence of ratings; and means for applying said dependence to predict the signal-to-noise ratio and noise figure for a subsequent received signal. 2. The system according to claim 1, which further comprises means for generating a data rate request message based on said prediction of signal-to-noise ratio. 3. The system of claim 1, further comprising means for transmitting said data rate request message to a transmitter. 4. The system according to claim 1, in which said dependence is based on the average value of the elements of the sequence of estimates. 5. The system according to claim 4, in which the means for determining includes a bank of filters for calculating the average value. 6. The system according to claim 5, in which the filter bank contains filters with an infinite impulse response. 7. The system of claim 5, wherein the transfer function coefficients associated with each filter in the filter bank are tuned for various environments with signal fading. 8. The system according to claim 7, in which various environments with fading signal include various environments with fading Rayleigh signal, and one medium is connected to a fast moving system, the second medium is connected to a slowly moving system, and the third medium is connected to a system moving at medium speed. 9. The system according to claim 7, which further comprises a selection circuitry connected to each of the bank filters to select an output signal from one of the filter bank filters, the output signal being connected to a filter having a transfer function most suitable for the current fading environment signal. 10. An effective transceiver of a communication system to provide accurate control signals to an external transceiver in accordance with the interference characteristics of the channel through which the transceiver of the communication system and an external transceiver comprising an antenna; duplexer associated with the antenna; a receiving path associated with the duplexer for receiving a signal on said channel and providing a digital signal in response to this signal; a baseband computer for receiving and processing a digital signal; a predictor of a signal-to-noise ratio and a noise figure for providing a prediction of a signal-to-noise ratio and a noise figure for a subsequent received digital signal; and speed request means for generating a speed control message and supplying a speed control message to an external transceiver in response to a prediction of the signal-to-noise ratio and noise figure. 11. The transceiver according to claim 10, in which the means for requesting speed is implemented in the computer of the main frequency band. 12. The transceiver according to claim 11, in which the means for requesting speed comprises means for narrowing the digital signal, estimating the magnitude of the carrier signal to the interference for the narrowed digital signal. 13. The transceiver according to item 12, in which the predictive device of the signal-to-noise ratio and noise figure includes a filter bank of the predictive device, each filter of the filter bank of the predictive device has a predictive signal-to-noise ratio and noise figure device for predicting the signal-to-noise ratio and coefficient noise in accordance with a predetermined fading characteristic of the signal of said channel. 14. The transceiver according to item 13, in which the predictive device, the signal-to-noise ratio and noise figure further comprises a forecast selection device for selecting from each of the predictive devices the signal-to-noise ratio and the noise figure of the signal-to-noise ratio and the noise figure most suitable for the current signal fading characteristics of said channel. 15. A system for accurately predicting the signal-to-noise ratio and the noise figure for a signal received via a channel, comprising: first means for providing carrier-to-noise ratios from the received signal; second means for filtering said carrier-to-noise ratio values in accordance with the fading characteristics of the signal of said channel and providing output signals in response to these values for the channel of slow fading, average fading, and fast fading of the signal; and third means for selecting from said output signals a predicted signal-to-noise ratio and noise figure. 16. The system of claim 15, wherein the second means comprises locking circuits for adjusting each of said output signals with a predetermined coefficient. 17. The system of clause 15, in which the second means includes an averaging filter to provide an average value of the ratio of the carrier signal to noise. 18. The system according to 17, in which the averaging filter is connected to a decibel conversion circuit for converting the values of the average value of the ratio of the carrier signal to noise into decibels and providing decibel values in response to them. 19. The system of claim 18, wherein the second means comprises a filter bank that includes a first filter that serves to receive decibel scale values and provide a prediction of signal-to-noise ratio and noise figure based on a channel with slow fading of the signal. 20. The system of claim 19, wherein the first filter comprises a decimation circuit for decimating decibel scale values and providing decimated values in response to them. 21. The system of claim 20, wherein the first filter comprises a long averaging filter for averaging the decimated values and supplying the averaged values to the delay circuit, wherein the output of the delay circuit is connected to a subtraction circuit for subtracting the delayed decimated values from the decibel scale values and supplying the output signal subtraction devices in response to them in a squaring circuit associated with an additional averaging filter and a square root extraction circuit, wherein the square root extraction circuit supplies an output signal to a first holding circuit, where the first holding circuit also takes averaged values as an input signal and provides a signal-to-noise ratio and noise figure based on a signal with slow fading of the signal in response to them. 22. The system according to item 21, in which the filter bank contains a second filter and a third filter to provide forecasts of the carrier signal to interference, suitable for the channel with a slow fading of the signal and the channel with the average fading of the signal, respectively. 23. The system of claim 15, wherein the second filtering means comprises a filter bank having a filter for each of said channel characteristics of slow signal fading, average signal fading, and fast signal fading. 24. The system of claim 23, wherein the filter bank comprises a first filter for approximating a Wiener filter, the first filter predicting the signal-to-noise ratio and the noise figure for a channel with slow fading. 25. The system of claim 24, wherein the filter bank comprises a second filter for approximating the Wiener filter, the second filter predicting the signal-to-noise ratio and the noise figure for the channel with fast fading of the signal. 26. The system of claim 25, wherein the filter bank comprises a third filter for predicting the signal-to-noise ratio and a noise figure for a channel with average signal fading, the third filter being a blocking filter. 27. A system for accurately predicting the signal-to-noise ratio and noise figure for a signal received through a channel, comprising: first means for obtaining signal-to-noise ratio values based on a received signal; second means for filtering the values of the ratio of the carrier signal to noise in accordance with the channel with fast fading of the signal and providing a forecast of the ratio of the carrier signal of fast fading to noise in response to them; third means for filtering the values of the ratio of the carrier signal to noise in accordance with the channel with slow fading of the signal and providing a forecast of the ratio of the carrier signal of slow fading to noise in response to them; fourth means for filtering the values of the ratio of the carrier signal to noise in accordance with the channel with the average fading of the signal and providing a forecast of the ratio of the carrier signal of the average fading to noise in response to them; and fifth means for selecting from predictions the carrier signal relationships of fast fading, slow fading, and average fading to noise, and providing a predicted signal-to-noise ratio and noise figure in response to them.