US-12627450-B2 - Phase noise determining method and related apparatus

Abstract

A phase noise determining method and a related apparatus are provided. The method includes: A first communication apparatus obtains a first signal, where the first signal includes a data signal and K phase-tracking reference signals PTRSs, where a value of an m th PTRS in the K PTRSs is determined based on a value of first interference, a value of second interference, and a preset receiving value of the m th PTRS, the first interference is inter-symbol interference generated by the data signal on the m th PTRS, the second interference is inter-symbol interference generated by a PTRS other than the m th PTRS in the K PTRSs on the m th PTRS, K and m are positive integers, and 1≤m≤K.

Inventors

• Qianli Ma
• Nuwan Suresh Ferdinand
• Huang Huang

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260512

Application Date

20230926

Priority Date

20210330

Claims (20)

1. 1 . A phase noise determining method, comprising: obtaining, by a first communication apparatus, a first signal comprising a data signal and K phase-tracking reference signals PTRSs, wherein a value of an m th PTRS in the K PTRSs is determined based on a value of a first interference, a value of a second interference, and a preset receiving value of the m th PTRS, wherein the first interference is an inter-symbol interference generated by the data signal on the m th PTRS, the second interference is an inter-symbol interference generated by a PTRS other than the m th PTRS in the K PTRSs, K and m are positive integers, and 1≤m≤K; and sending, by the first communication apparatus, a second signal to a second communication apparatus, wherein the second signal is a signal obtained through baseband signal processing performed on the first signal.
2. 2 . The method according to claim 1 , wherein the value of the first interference and the value of the second interference are determined based on a type of a receiver.
3. 3 . The method according to claim 1 , wherein before the obtaining, by the first communication apparatus, the first signal, the method further comprises: obtaining, by the first communication apparatus, first indication information sent by the second communication apparatus, wherein the first indication information indicates the type of the receiver.
4. 4 . The method according to claim 2 , wherein the method further comprises: sending, by the first communication apparatus, second indication information to the second communication apparatus, wherein the second indication information indicates the type of the receiver.
5. 5 . The method according to claim 1 , wherein the value of the m th PTRS is determined based additionally on a first parameter that is a value related to a signal amplitude.
6. 6 . The method according to claim 5 , wherein the method further comprises: sending, by the first communication apparatus, third indication information to the second communication apparatus, wherein the third indication information indicates the first parameter.
7. 7 . The method according to claim 1 , wherein the value of the m th PTRS is determined based additionally on a second parameter that is a value related to a signal phase.
8. 8 . The method according to claim 7 , wherein the method comprises: sending, by the first communication apparatus, fourth indication information to the second communication apparatus, wherein the fourth indication information indicates the second parameter.
9. 9 . A phase noise determining method, comprising: obtaining, by a first communication apparatus, a first signal, wherein the first third signal is a-signal obtained through introduction of phase noise into a second signal sent by a second communication apparatus, and the first signal comprises a data signal and K phase-tracking reference signals PTRSs, wherein the second signal is obtained through baseband signal processing performed on a third signal, the third signal comprises a data signal and K PTRSs, a value of an m th PTRS in the K PTRSs in the third signal is determined based on a value of a first interference, a value of a second interference, and a preset receiving value of the m th PTRS, the first interference is an inter-symbol interference generated by the data signal in the third signal on the m th PTRS, the second interference is an inter-symbol interference generated by a PTRS other than the m th PTRS in the K PTRSs in the third signal on the m th PTRS, K and m are positive integers, and 1≤m≤K; and determining, by the first communication apparatus, the phase noise based on values of the K PTRSs in the first signal and preset receiving values of the K PTRSs in the third signal.
10. 10 . The method according to claim 9 , wherein before the determining, by the first communication apparatus, the phase noise based on values of the K PTRSs in the first signal and preset receiving values of the K PTRSs in the third signal, the method further comprises: converting, by the first communication apparatus, the first signal into a first frequency domain signal; performing, by the first communication apparatus, channel equalization on the first frequency domain signal to obtain a second frequency domain signal; preprocessing, by the first communication apparatus, the second frequency domain signal based on a receiver, and converting the processed second frequency domain signal into a first time domain signal; and obtaining, by the first communication apparatus, the values of the K PTRSs in the first signal from the first time domain signal.
11. 11 . The method according to claim 10 , wherein the method further comprises: sending, by the first communication apparatus, first indication information to the second communication apparatus, wherein the first indication information indicates a type of the receiver.
12. 12 . The method according to claim 10 , wherein the method further comprises: obtaining, by the first communication apparatus, second indication information sent by the second communication apparatus, wherein the second indication information indicates a type of the receiver.
13. 13 . The method according to claim 10 , wherein the method further comprises: converting, by the first communication apparatus, the first frequency domain signal into a second time domain signal; and performing, by the first communication apparatus, phase noise compensation on the second time domain signal based on the phase noise.
14. 14 . The method according to claim 9 , wherein the method further comprises: receiving, by the first communication apparatus, third indication information sent by the second communication apparatus, wherein the third indication information indicates a first parameter, and the first parameter is a value related to a signal amplitude; and determining, by the first communication apparatus, the phase noise based on values of the K PTRSs in the first signal and preset receiving values of the K PTRSs in the third signal comprises: determining, by the first communication apparatus, the phase noise based on the values of the K PTRSs in theFirsts signal, the preset receiving values of the K PTRSs in the third signal, and the first parameter.
15. 15 . The method according to claim 9 , wherein the method further comprises: receiving, by the first communication apparatus, fourth indication information sent by the second communication apparatus, wherein the fourth indication information indicates a second parameter, and the second parameter is a value related to a signal phase; and determining, by the first communication apparatus, the phase noise based on values of the K PTRSs in the first signal and preset receiving values of the K PTRSs in the third signal comprises: determining, by the first communication apparatus, the phase noise based on the values of the K PTRSs in the first signal, the preset receiving values of the K PTRSs in the third signal, and the second parameter.
16. 16 . A communication apparatus comprising: a transceiver unit and a processing unit, wherein the transceiver unit is configured to obtain a first signal comprising a data signal and K phase-tracking reference signals PTRSs, wherein a value of an m th PTRS in the K PTRSs is determined based on a value of a first interference, a value of a second interference, and a preset receiving value of the m th PTRS, wherein the first interference is an inter-symbol interference generated by the data signal on the m th PTRS, the second interference is an inter-symbol interference generated by a PTRS other than the m th PTRS in the K PTRSs, K and m are positive integers, and 1≤m≤K; the processing unit is configured to perform baseband signal processing on the first signal to obtain a second signal; and the transceiver unit is further configured to send the second signal to a second communication apparatus.
17. 17 . The communication apparatus according to claim 16 , wherein the value of the first interference and the value of the second interference are determined based on a type of a receiver.
18. 18 . The communication apparatus according to claim 17 , wherein the transceiver unit is further configured to: obtain first indication information sent by the second communication apparatus, wherein the first indication information indicates the type of the receiver.
19. 19 . The communication apparatus according to claim 17 , wherein the transceiver unit is further configured to: send second indication information to the second communication apparatus, wherein the second indication information indicates the type of the receiver.
20. 20 . The communication apparatus according to claim 16 , wherein the value of the m th PTRS is determined based additionally on a first parameter that is a value related to a signal amplitude.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2022/083220, filed on Mar. 26, 2022, which claims priority to Chinese Patent Application No. 202110341555.2, filed on Mar. 30, 2021. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a phase noise determining method and a related apparatus. BACKGROUND High frequency bands (that is, frequency bands higher than 6 GHz, mainly including 28 GHz, 39 GHz, 60 GHz, 73 GHz, and the like) have become a hotspot for research and development hotspot in industry, to meet increasing communication requirements, due to abundant frequency band resources at these high frequencies. Using such a high frequency may provide an antenna array with high bandwidth and high integration for communication to achieve a high throughput. However, a phase noise (PHN) problem with the high frequency bands is excessively prominent. Currently, a phase-tracking reference signal (PTRS) is introduced into high frequency band communications of 5th generation (5G) mobile communication technology, for phase noise estimation and compensation. To further reduce a peak-to-average power ratio (PAPR) in high frequency communications, a corresponding optimization design may be performed on a filter of a receiving device. Usually, a designed filter is a non-Nyquist filter. Because the non-Nyquist filter introduces inter-symbol interference of adjacent code elements in a signal, the introduction of the non-Nyquist filter causes phase noise to be determined ineffectively. SUMMARY This application provides a phase noise determining method and a related apparatus, to effectively determine phase noise in a signal. According to a first aspect, this application provides a phase noise determining method. The method includes: A first communication apparatus obtains a first signal, where the first signal includes a data signal and K phase-tracking reference signals PTRSs. A value of an mth PTRS in the K PTRSs is determined based on a value of a first interference, a value of a second interference, and a preset receiving value of the mth PTRS, the first interference is an inter-symbol interference generated by the data signal on the mth PTRS, the second interference is an inter-symbol interference generated by a PTRS other than the mt PTRS in the K PTRSs on the mth PTRS, K and m are positive integers, and 1≤m≤K. The first communication apparatus sends a second signal to a second communication apparatus, where the second signal is a signal obtained through baseband signal processing performed on the first signal. In this manner, values of the K PTRSs in the first signal may be preprocessed, so that under an assumed condition that there is no phase noise, a value of a PTRS received by a receive end may be determined based on a preset receiving value agreed on in advance, to eliminate any impact of inter-symbol interference on the value of the PTRS. Because the value of the PTRS actually received by the receive end is further affected by the phase noise, the phase noise may be calculated by using the actual receiving value and the preset receiving value of the PTRS. With reference to the first aspect, in a possible implementation, the value of the first interference and the value of the second interference are determined based on a type of a receiver. Optionally, the first communication apparatus may determine, based on the type of the receiver, a calculation method for calculating the inter-symbol interference. With reference to the first aspect, in a possible implementation, before a first communication apparatus obtains a first signal, the method further includes: The first communication apparatus obtains first indication information sent by the second communication apparatus, where the first indication information indicates the type of the receiver. In this manner, the second communication apparatus determines the type of the receiver and notifies the first communication apparatus of the type of the receiver. With reference to the first aspect, in a possible implementation, the method further includes: The first communication apparatus sends second indication information to the second communication apparatus, where the second indication information indicates the type of the receiver. In this manner, the first communication apparatus determines the type of the receiver and notifies the second communication apparatus of the type of the receiver. With reference to the first aspect, in a possible implementation, that a value of an mth PTRS in the K PTRSs is determined based on a value of first interference, a value of second interference, and a preset receiving value of the mt PTRS includes: The value of the mth PTRS is determined based on the value of the first interference, the value of the sec