CN-122029449-A - Sensing method and communication device

CN122029449ACN 122029449 ACN122029449 ACN 122029449ACN-122029449-A

Abstract

A sensing method and a communication device relate to the field of communication sensing, and provide a two-dimensional discrete m-sequence which can realize the sensing function of access network equipment. The method comprises the steps of generating a first sequence and sending a first sensing signal, wherein the first sequence is obtained by transforming an m-sequence according to a cyclic shift value and Doppler frequency offset, and the first sensing signal is determined according to the first sequence.

Inventors

WANG RUIHUA
WANG FAN

Assignees

华为技术有限公司

Dates

Publication Date: 20260512
Application Date: 20231012

Claims (20)

A method of sensing, the method comprising: generating a first sequence, wherein the first sequence is obtained by transforming an m sequence according to a cyclic shift value and Doppler frequency offset; and transmitting a first sensing signal, wherein the first sensing signal is determined according to the first sequence.
The method of claim 1, wherein the first sequence is obtained by transforming an m-sequence according to a cyclic shift value and a doppler shift, and comprises: The first sequence is obtained by transforming a second sequence according to the cyclic shift value and the Doppler frequency offset, and the second sequence is obtained by performing discrete Fourier transform on the m sequence.
The method of claim 2 wherein the mutual ambiguity function of at least one of the two first sequences differing in the cyclic shift value and the doppler frequency offset is obtained by translating the self ambiguity function of the second sequence in the delay-doppler frequency offset plane by at least one of a difference between the cyclic shift values of the two first sequences and a difference between the doppler frequency offsets.
A method according to any one of claims 1 to 3, wherein the m-sequence corresponds to a d-th order primitive polynomial, the first sequence has (2 d -1) 2 values, the length of the first sequence is 2 d -1, d is a positive integer).
The method of any of claims 1-4, wherein the cyclic shift is associated with a maximum delay value, the maximum delay value being a maximum delay between transmitting a perceived signal and receiving an echo signal in a perceived range, the doppler shift being associated with a maximum doppler shift value, the maximum doppler shift value being a maximum doppler shift of the echo signal resulting from perceived target motion in the perceived range.
The method of claim 5, wherein the cyclic shift value satisfies the relationship p u ＝u*a,p u < L, wherein p u is the cyclic shift value, a is the maximum delay value, u is a first multiple value, L is the length of the first sequence, and p u , a, u, L are positive integers.
The method of claim 5 or 6, wherein the Doppler frequency offset satisfies the relationship θ v =v.b, Wherein, theta v is the Doppler frequency offset, For the maximum Doppler frequency offset value, LXb is an integer multiple of 2pi, v is a second multiple value, L is the length of the first sequence, and v is a positive integer.
The method according to any one of claims 5-7, wherein the nth element in the first sequence satisfies the following relationship: n is more than or equal to 0 and less than or equal to L-1; wherein, the And b= [ k 0 ,k 1 ,…,k L-1 ], n is the element number in the first sequence, θ v is the Doppler frequency offset, p u is the cyclic shift value, L is the length of the first sequence, B is a second sequence obtained by performing discrete Fourier transform on the m sequence, and n and L are positive integers.
The method of any one of claims 5-8, wherein the self-blurring function of the first sequence has a unique peak.
The method of claim 9 wherein the peak lies in a delay-doppler frequency offset plane Within the range, a is the maximum delay value, And θ v is the Doppler frequency offset, which is the maximum Doppler frequency offset value.
The method of claim 10 wherein peaks of a mutual ambiguity function of a third sequence relative to a fourth sequence lie in delay planes outside [0, a ], said third sequence and said fourth sequence being said first sequence of the same doppler frequency offset but different values of said cyclic shift.
A method according to claim 10 or 11, wherein the peak of the mutual blur function of the fifth sequence relative to the sixth sequence is located at And on the other Doppler frequency offset plane, the fifth sequence and the sixth sequence are the first sequences with different Doppler frequency offsets, and theta v1 is the Doppler frequency offset of the fifth sequence.
The method of any of claims 5-12, wherein the doppler bias values of a plurality of the first sequences are the same but the cyclic shift values are different, the plurality of the first sequences comprising a target sequence, the method further comprising: Receiving a first mixed signal; And determining whether the first peak value is a peak value generated by the target sensing signal and an echo signal corresponding to the target sensing signal according to the position of the first peak value in at least one peak value of a mutual blurring function formed by the target sensing signal and the first mixed signal, wherein the target sensing signal is generated according to the target sequence.
The method of claim 13, wherein determining whether the first peak is a peak generated by an echo signal corresponding to the target perceived signal from a first peak position of at least one peak of a mutual blur function composed of the target perceived signal and the first mixed signal comprises: And under the condition that the first peak value is positioned on a delay plane beyond [0, a ], determining that the first peak value is not a peak value generated by the target sensing signal and an echo signal corresponding to the target sensing signal, wherein a is the maximum delay value.
The method of claim 13, wherein determining whether the first peak is a peak generated by an echo signal corresponding to the target perceived signal from a first peak position of at least one peak of a mutual blur function composed of the target perceived signal and the first mixed signal comprises: at the first peak is located at And under the condition of being out of the Doppler frequency offset plane, determining that the first peak value is not a peak value generated by the echo signal corresponding to the target sensing signal and the target sensing signal, wherein, And θ v2 is the Doppler frequency offset of the target sequence for the maximum Doppler frequency offset value.
The method of claim 13, wherein determining whether the first peak is a peak generated by an echo signal corresponding to the target perceived signal from a first peak position of at least one peak of a mutual blur function composed of the target perceived signal and the first mixed signal comprises: at the first peak is located at And under the condition of being on the time delay-Doppler frequency offset plane, determining the first peak value as the peak value generated by the target sensing signal and the echo signal corresponding to the target sensing signal, wherein a is the maximum time delay value, And θ v2 is the Doppler frequency offset of the target sequence for the maximum Doppler frequency offset value.
The method according to any of claims 1-16, wherein the doppler bias is preconfigured, or determined by negotiating with other access network devices, or configured by a control node.
A communication device comprising means for performing the method of any of claims 1-17.
A communication device comprising a processor and interface circuitry for receiving signals from other communication devices than the communication device and transmitting signals from the processor to the processor or sending signals from the processor to other communication devices than the communication device, the processor being configured to implement the method of any of claims 1-17 by logic circuitry or executing code instructions.
A communication device comprising a processor for executing a computer program or instructions to cause the method according to any one of claims 1-17 to be implemented.

Description

Sensing method and communication device Technical Field The present application relates to the field of communication sensing, and in particular, to a sensing method and a communication device. Background Radar obtains physical information (e.g., distance, speed, angle, etc.) of a target by transmitting a perceived signal and receiving an echo signal. The choice of the perceived signal can greatly affect the performance of the radar. Co-located (C) multiple-input multiple-output (multiple input multiple output, MIMO) radar (hereinafter referred to as C-MIMO radar) sensing has the advantage of high angular resolution, and multiple sensing signals can be transmitted. In the communication and perception integration, the perception function of the access network equipment is beneficial to improving the precision and efficiency of communication, and the function of the C-MIMO radar can be integrated into the access network equipment by utilizing the multi-antenna advantage of the access network equipment. However, how to implement the awareness function of the access network device is a problem to be solved. Disclosure of Invention The embodiment of the application provides a sensing method and a communication device, which are used for designing a two-dimensional discrete m sequence as a sensing sequence so as to realize the sensing function of access network equipment. In order to achieve the above purpose, the application adopts the following technical scheme: In a first aspect, a sensing method is provided, which may be performed by an access network device, or a component of the access network device, for example, a processor, a chip, or a chip system of the access network device, or a logic module or software capable of implementing all or part of the access network device. The method comprises the steps of generating a first sequence, and transforming the modulated m sequence according to a cyclic shift value and Doppler frequency offset to obtain the first sequence. A first perceptual signal is transmitted, the first perceptual signal being determined based on a first sequence. Based on the sensing method, the access network equipment transforms the modulated m-sequence according to the Doppler frequency offset and the cyclic shift value to obtain a two-dimensional discrete m-sequence, namely a first sequence, wherein the first sequence has good autocorrelation function characteristics, fuzzy function characteristics and the like, so that the sensing signal is formed according to the first sequence to realize target sensing, and when MIMO sensing is carried out, the access network equipment can distinguish echo signals of a plurality of sensing signals transmitted by the access network equipment and echo signals corresponding to sensing signals transmitted by other access network equipment through different Doppler frequency offset and cyclic shift value settings of the first sequence. In the embodiment of the application, the m sequence is a sequence consisting of 0 and 1, and the m sequence after modulation is a sequence consisting of 1 and-1, wherein 0 in the m sequence is changed into 1 and 1 is changed into-1. In one possible design, the first sequence is obtained by transforming the modulated m-sequence according to the cyclic shift value and the Doppler frequency offset, and the method can include the step that the first sequence is obtained by transforming the second sequence according to the cyclic shift value and the Doppler frequency offset, and the second sequence is obtained by performing discrete Fourier transform on the modulated m-sequence. That is, the access network device may obtain the first sequence by performing Discrete Fourier Transform (DFT) on the modulated m-sequence with the length L to obtain a discrete frequency domain sequence with the length L (i.e., the second sequence), and transforming the second sequence according to the selected cyclic shift value and the doppler spectrum. In one possible design, the mutual ambiguity function of the two first sequences with at least one of the cyclic shift value and the doppler frequency offset is obtained by translating the self ambiguity function of the second sequence on the delay-doppler frequency offset plane according to at least one of the difference between the cyclic shift values of the two first sequences and the difference between the doppler frequency offsets. That is, the mutual ambiguity function between any two first sequences with at least one parameter different from the cyclic shift value and the doppler frequency offset can be obtained by translating the self-ambiguity function of the m-sequence after modulation and Discrete Fourier Transform (DFT) according to the difference between the cyclic shift values and/or the doppler frequency offset between the two first sequences. In one possible design, the m-sequence corresponds to the d-th order primitive polynomial, the first sequence has (2 d-1)2 values, the length o