CN-116232827-B - Timing synchronization method and device for sampling signals, terminal equipment and storage medium

CN116232827BCN 116232827 BCN116232827 BCN 116232827BCN-116232827-B

Abstract

The application discloses a timing synchronization method and device of sampling signals, terminal equipment and a storage medium. The method comprises the steps of obtaining a first position of a first target related sequence in the first related sequence, obtaining a first signal detection parameter corresponding to the first target related sequence through a peak-to-average ratio method, obtaining a second position of a second related sequence in the first related sequence, obtaining a second signal detection parameter corresponding to the second related sequence through the peak-to-average ratio method, and determining a timing position of a preamble sequence according to the first position, the second position and the length of the preamble sequence when the first signal detection parameter is larger than a corresponding first threshold value and the second signal detection parameter is larger than a corresponding second threshold value. Because the first signal detection parameter and the second signal detection parameter are obtained by calculation through a peak-to-average ratio method, and then are judged through the respective corresponding threshold values of the signal detection parameters, the timing position estimation value of the preamble sequence is accurately and rapidly determined.

Inventors

XIONG TAO
LIU SHIQIAN
LU CONGMING

Assignees

广州海格通信集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20211203

Claims (8)

1. A method for timing synchronization of a sampled signal, comprising: Determining a first position of a first target correlation sequence in the first correlation sequence The first target related sequence is a sequence in a first related sequence corresponding to the current sliding window size, the first sliding window size is the sum of a preamble sequence and a cyclic prefix length, and the first related sequence is a sequence obtained by performing related processing according to a sampling signal; obtaining a first signal detection parameter corresponding to the first target related sequence by a peak-to-average ratio method; determining a second position of a second correlation sequence in the first correlation sequence The second correlation sequence is a sequence constructed from the first correlation sequence; obtaining a second signal detection parameter corresponding to the second correlation sequence by a peak-to-average ratio method; determining a timing position of the first correlation sequence according to a third formula when the first signal detection parameter is greater than a corresponding first threshold and the second signal detection parameter is greater than a corresponding second threshold ; The third formula is: ; Wherein, the For the length of the preamble sequence, Is that One-fourth of the number of (a), The representation takes the minimum value of the value, The absolute value is represented, and the preamble sequence is a constant envelope zero autocorrelation sequence; the method further comprises the steps of: adding after said first correlation sequence 0, Dividing the first correlation sequence after zero addition by M points before and after the position, and Other positions than M points before and after the position are 0, the obtained sequence is the second related sequence, M is more than 0, but Is an integer of (a).
2. The method according to claim 1, wherein the calculating the first signal detection parameter corresponding to the first target correlation sequence by the peak-to-average ratio method includes: finding the maximum value of the first target correlation sequence ; Less than in the first target related sequence Is averaged ; According to the maximum value And the average value Calculating a first signal detection parameter 。
3. The method according to claim 2, wherein the maximum value is based on And the average value Calculating a first signal detection parameter, comprising: calculating a first signal detection parameter according to a first formula; the first formula is: 。
4. The method according to any one of claims 1 to 3, wherein the step of obtaining the second signal detection parameter corresponding to the second correlation sequence by the average peak ratio method includes the step of calculating the second signal detection parameter in the same manner as the calculation method of the first signal detection parameter.
5. The method according to any one of claims 1-2, wherein the method further comprises: The steps of claim 1 are performed on a second target correlation sequence, which is a sequence in the first correlation sequence corresponding to the next sliding window size, if the first signal detection parameter is less than or equal to a corresponding first threshold value and/or the second signal detection parameter is less than or equal to a corresponding second threshold value.
6. A timing synchronization apparatus for sampling a signal, comprising: a calculation module for obtaining a first position of the first target correlation sequence in the first correlation sequence The first target related sequence is a sequence in a first related sequence corresponding to the current sliding window size, the first sliding window size is the sum of a preamble sequence and a cyclic prefix length, the first related sequence is a sequence obtained by performing related processing according to a sampling signal, a first signal detection parameter corresponding to the first target related sequence is obtained through a peak-to-average ratio method, and a second position of a second related sequence in the first related sequence is obtained The second correlation sequence is a sequence constructed according to the first correlation sequence, and a second signal detection parameter corresponding to the second correlation sequence is obtained through a peak-to-average ratio method; A processing module configured to determine a timing position of the first correlation sequence according to a third formula when the first signal detection parameter is greater than a corresponding first threshold and the second signal detection parameter is greater than a corresponding second threshold ; The third formula is: ; Wherein, the For the length of the preamble sequence, Is that One-fourth of the number of (a), The representation takes the minimum value of the value, The absolute value is represented, and the preamble sequence is a constant envelope zero autocorrelation sequence; The processing module is further configured to add after the first correlation sequence 0, Dividing the first correlation sequence after zero addition by M points before and after the position, and Other positions than M points before and after the position are 0, the obtained sequence is the second related sequence, M is more than 0, but Is an integer of (a).
7. A terminal device, comprising: a memory storing executable program code; a processor coupled to the memory; the processor invoking the executable program code stored in the memory to cause the processor to correspondingly perform the method of any of claims 1-5.
8. A computer readable storage medium comprising instructions which, when run on a processor, cause the processor to perform the method of any of claims 1-5.

Description

Timing synchronization method and device for sampling signals, terminal equipment and storage medium Technical Field The present application relates to the field of communications, and in particular, to a method, an apparatus, a terminal device, and a storage medium for timing synchronization of sampling signals. Background In the prior art, when the frequency offset of a received signal is large, the error of a timing position estimated value is large, and the method is not suitable for scenes such as high-dynamic low-orbit satellite communication. Disclosure of Invention The embodiment of the application provides a timing synchronization method, a timing synchronization device, terminal equipment and a storage medium of sampling signals, which are used for quickly and accurately determining a timing position estimated value through two detection parameters. The first aspect of the present application provides a method for timing synchronization of sampling signals, which may include: Solving a first position Pos 1 of a first target related sequence in the first related sequence, wherein the first target related sequence is a sequence in the first related sequence corresponding to the current sliding window size, the first sliding window size is the sum of a preamble sequence and a cyclic prefix length, and the first related sequence is a sequence obtained by performing related processing according to a sampling signal; obtaining a first signal detection parameter corresponding to the first target related sequence by a peak-to-average ratio method; Obtaining a second position Pos 2 of a second correlation sequence in the first correlation sequence, wherein the second correlation sequence is a sequence constructed according to the first correlation sequence; obtaining a second signal detection parameter corresponding to the second correlation sequence by a peak-to-average ratio method; And determining a timing position of the preamble sequence according to a first position Pos 1 of the first target correlation sequence in the first correlation sequence, a second position Pos 2 of the second correlation sequence in the first correlation sequence and the length of the preamble sequence when the first signal detection parameter is greater than a corresponding first threshold and the second signal detection parameter is greater than a corresponding second threshold. Optionally, the calculating, by using a peak-to-average ratio method, a first signal detection parameter corresponding to the first target correlation sequence may include: solving a maximum value max cor1 of the first target correlation sequence; Averaging sequences less than max cor1/2 in the first target correlation sequence Based on the maximum max cor1 and the average valueA first signal detection parameter s index1 is calculated. Optionally, the step of calculating the average value according to the maximum value max cor1Calculating the first signal detection parameter may include: calculating a first signal detection parameter according to a first formula; the first formula is: Optionally, the calculating, by a peak-to-average ratio method, a second signal detection parameter corresponding to the second correlation sequence may include: Obtaining a maximum value max cor2 of the second correlation sequence; According to the maximum max cor2 and the average value A second signal detection parameter s index2 is calculated. Optionally, the method comprises the steps of determining the maximum value max cor2 and the average valueCalculating the second signal detection parameter may include: calculating a second signal detection parameter according to a second formula; The second formula is: Optionally, determining the timing position of the first correlation sequence according to the first position of the first target correlation sequence in the first correlation sequence, the second position of the second correlation sequence in the first correlation sequence, and the length of the preamble sequence may include: determining a timing position Pos of the first correlation sequence according to a third formula; The third formula is: Where N is the length of the preamble sequence, N 1 is one-fourth of N, min (·, ·) represents taking the minimum value, and |·| represents taking the absolute value. Optionally, the method may further include: And constructing a second correlation sequence according to the first correlation sequence. Optionally, the constructing a second correlation sequence according to the first correlation sequence may include: Adding 2N 1 0 s behind the first correlation sequence, setting 0 s at other positions except M points before and after the position of Pos 1-2N1 and M points before and after the position of Pos 1+2N1 of the first correlation sequence after zero addition, wherein the obtained sequence is the second correlation sequence, and M is an integer larger than 0. Optionally, the method may further include: The steps of