一种面向短时突发信号的高精度同步方案设计

doi:10.16180/j.cnki.issn1007-7820.2022.05.011

Abstract

Abstract:

In view of the problems of long acquisition time, high algorithm complexity and high resource overhead in short-term burst communication, a high-precision synchronization scheme is designed. The scheme customizes the frame structure, uses differential matching algorithm of the unique code to achieve signal detection and frame synchronization, and adopts forward estimation algorithm based on pilot sequence to achieve frequency offset estimation. In order to take into account the accuracy of frequency offset estimation and the algorithm complexity, a sliding correlation algorithm is applied for the unique code to achieve initial phase capture, which makes the system compact and more suitable for FPGA hardware implementation. Theoretical analysis and simulation experiments show that the scheme has better receiving performance under the conditions of low signal-to-noise ratio and high dynamic range. The frequency synchronization accuracy can reach one ten thousandth of the symbol rate. Hardware co-simulation and verification are carried out, and the corresponding simulation waveforms are provided in the present study.

Key words: short-term burst signal, unique code, pilot sequence, forward error correction, Gardner algorithm, signal detection, carrier synchronization, timing synchronization

CLC Number:

TN911.7

WAN Jiajun,YUE Chunsheng,SUN Hongsheng,DAI Jiangtao. A High-Precision Synchronization Scheme Design for Short-Term Burst Signals[J].Electronic Science and Technology, 2022, 35(5): 66-73.

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A High-Precision Synchronization Scheme Design for Short-Term Burst Signals

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