High-precision time of arrival estimation method, device and medium for burst frequency hopping communication system

By performing double sampling and correlation processing on multi-channel signals in a burst frequency hopping communication system, combined with a time compensation table, high-precision arrival time estimation is achieved, solving the problem of low accuracy under low sampling rate and reducing engineering implementation complexity and hardware overhead.

CN121643802BActive Publication Date: 2026-06-0910TH RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
10TH RES INST OF CETC
Filing Date
2026-02-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing correlation peak arrival time measurement methods based on spread spectrum systems have low accuracy at low sampling rates and are complex to implement, making it difficult to meet the high-precision requirements of burst communication.

Method used

At the receiving end, the multi-channel down-conversion signal is sampled twice, correlated with the local sequence, time-aligned by a delay network module, and non-coherently accumulated in parallel. Signal detection is performed using a frequency hopping pattern, and precise estimation of timing error is achieved by combining linear fitting and a time compensation table.

Benefits of technology

It improves the accuracy of time of arrival estimation, reduces the complexity of receiving and processing, reduces hardware overhead, adapts to the requirements of high-precision time of arrival measurement, and reduces the risk of signal mis-acquisition or missed acquisition.

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Abstract

The application discloses a high-precision time of arrival estimation method, equipment and medium for a burst frequency hopping communication system, relates to the field of time synchronization of a burst communication system, and comprises the following steps: a receiving end performs multi-channel down-conversion and 2 times symbol sampling on a frequency hopping signal, and performs correlation processing on a local sequence; non-coherent accumulation is performed on the correlation results after the correlation results are aligned according to a frequency hopping pattern and a delay difference, and a frame header stamping time of a peak time is recorded; a timing error estimation value is calculated by performing linear fitting on the correlation peak results; a corresponding compensation time is obtained by querying a time compensation table established offline, so as to correct the timing error estimation value, and a precise timing error estimation value is obtained; and finally, the precise estimation value is compensated to the frame header stamping time, and a high-precision time of arrival is output. The application realizes high-precision time synchronization under a low sampling rate, and effectively reduces hardware cost.
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