Channel Impulse Response CIR Feedback Method and Apparatus

Abstract

A channel impulse response CIR feedback method and apparatus are provided. The method includes the following: A second communication device transmits a second signal, and a first communication device receives a first signal obtained through channel transmission of the second signal and transmits a CIR report corresponding to the first signal. The CIR report indicates the quantization result of each first CIR tap over at least one continuous period, wherein the amplitude of the first CIR tap is greater than or equal to a first threshold. Based on this solution, the first communication device feeds back to the second communication device the quantization result of each CIR tap whose amplitude is greater than or equal to a threshold over at least one continuous period. Compared to a solution in which the quantization result of each CIR tap is fed back, this solution reduces the number of CIR taps that are fed back, thereby reducing signaling overhead.

Claims

1. A channel impulse response CIR feedback method, wherein the method is The steps include receiving a first signal, A step of transmitting a CIR report corresponding to the first signal, wherein the CIR report shows the quantization result of each first CIR tap over at least one continuous period, and the amplitude of the first CIR tap is greater than or equal to a first threshold. Methods that include...

2. The CIR report further shows the quantization results of each second CIR tap in the at least one continuous period, wherein the amplitude of the second CIR tap is less than or equal to the first threshold. The method according to claim 1.

3. The CIR report includes a first bit, When the first bit is set to the first value, the current CIR tap is the second CIR tap. When the first bit is set to the second value, the current CIR tap is the first CIR tap, and the quantization result of the current CIR tap is represented by N consecutive bits following the first bit, where N is a positive integer. The method according to claim 2.

4. The quantization result of the current CIR tap includes the quantization result of the first feature and the quantization result of the second feature. The quantization result of the first feature is represented by the first K bits of the N bits, and the quantization result of the second feature is represented by the last L bits of the N bits, where K and L are positive integers, and the sum of K and L is equal to N. The first feature is the I signal of the current CIR tap and the second feature is the Q signal of the current CIR tap, or the first feature is the amplitude of the current CIR tap and the second feature is the phase of the current CIR tap. The method according to claim 3.

5. The CIR report includes a first field and a second field, each corresponding to at least one consecutive period. The first field corresponding to the first continuous period represents the first CIR tap in the first continuous period, the second field corresponding to the first continuous period represents the quantization result of the first CIR tap in the first continuous period, and the first continuous period is any one of the at least one continuous period. The method according to claim 1.

6. The first field corresponding to the first consecutive period is a bitmap, the bitmap contains X bits, where X is the number of CIR taps in the first consecutive period, the X bits correspond one-to-one with the X CIR taps in the first consecutive period, and X is a positive integer. When the second bit is set to the third value, the CIR tap corresponding to the second bit is the first CIR tap; when the second bit is set to the fourth value, the CIR tap corresponding to the second bit is the second CIR tap; and the second bit is any bit in the bitmap. The method according to claim 5.

7. The first field corresponding to the first continuous period is positioned before the second field corresponding to the first continuous period. The method according to claim 5 or 6.

8. The quantization result of the CIR tap includes the quantization results of the I signal and Q signal of the CIR tap, or The quantization result of the CIR tap includes the quantization results of the amplitude and phase of the CIR tap. The method according to any one of claims 1 to 7.

9. The CIR report further indicates the first threshold, The method according to any one of claims 1 to 8.

10. The aforementioned at least one consecutive period is at least one consecutive period within a window. The method according to any one of claims 1 to 9.

11. A communication method, wherein the method is The steps include transmitting a second signal, Steps include receiving a channel impulse response CIR report corresponding to a first signal, wherein the first signal is a signal obtained through channel transmission of the second signal, the CIR report shows the quantization result of each first CIR tap over at least one continuous period, and the amplitude of the first CIR tap is greater than or equal to a first threshold, and A communication method that includes this.

12. The CIR report further shows the quantization results of each second CIR tap in the at least one continuous period, wherein the amplitude of the second CIR tap is less than or equal to the first threshold. The method according to claim 11.

13. The CIR report includes a first bit, When the first bit is set to the first value, the current CIR tap is the second CIR tap. When the first bit is set to the second value, the current CIR tap is the first CIR tap, and the quantization result of the current CIR tap is represented by N consecutive bits following the first bit, where N is a positive integer. The method according to claim 12.

14. The quantization result of the current CIR tap includes the quantization result of the first feature and the quantization result of the second feature. The quantization result of the first feature is represented by the first K bits of the N bits, and the quantization result of the second feature is represented by the last L bits of the N bits, where K and L are positive integers, and the sum of K and L is equal to N. The first feature is the I signal of the current CIR tap and the second feature is the Q signal of the current CIR tap, or the first feature is the amplitude of the current CIR tap and the second feature is the phase of the current CIR tap. The method according to claim 13.

15. The CIR report includes a first field and a second field, each corresponding to at least one consecutive period. The first field corresponding to the first continuous period represents the first CIR tap in the first continuous period, the second field corresponding to the first continuous period represents the quantization result of the first CIR tap in the first continuous period, and the first continuous period is any one of the at least one continuous period. The method according to claim 11.

16. The first field corresponding to the first consecutive period is a bitmap, the bitmap contains X bits, where X is the number of CIR taps in the first consecutive period, the X bits correspond one-to-one with the X CIR taps in the first consecutive period, and X is a positive integer. When the second bit is set to the third value, the CIR tap corresponding to the second bit is the first CIR tap; when the second bit is set to the fourth value, the CIR tap corresponding to the second bit is the second CIR tap; and the second bit is any bit in the bitmap. The method according to claim 15.

17. The first field corresponding to the first continuous period is positioned before the second field corresponding to the first continuous period. The method according to claim 15 or 16.

18. The quantization result of the CIR tap includes the quantization results of the I signal and Q signal of the CIR tap, or The quantization result of the CIR tap includes the quantization results of the amplitude and phase of the CIR tap. The method according to any one of claims 11 to 17.

19. The CIR report further indicates the first threshold, The method according to any one of claims 11 to 18.

20. The aforementioned at least one consecutive period is at least one consecutive period within a window. The method according to any one of claims 11 to 19.

21. A communication device, the communication device comprising a module configured to perform the method described in any one of claims 1 to 20.

22. A communication device, wherein the communication device includes a processor, the processor is configured to execute a computer program or instructions, or is configured to enable the communication device to perform the method according to any one of claims 1 to 20 through logic circuits.

23. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs are executed on a communication device, the method according to any one of claims 1 to 20 is executed.

24. A computer program product, wherein the computer program product includes computer instructions, and when some or all of the computer instructions are executed, the method according to any one of claims 1 to 20 is executed.

25. A communication system comprising a first communication device and a second communication device, wherein the first communication device is configured to perform the method described in any one of claims 1 to 10, and the second communication device is configured to perform the method described in any one of claims 11 to 20.

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