| Citation: | Fangling ZENG, Xiaofeng OUYANG, Hao XU, Daqian LÜ. Improved Long-code Direct Acquisition Algorithm Based on Time-frequency Fusion[J]. Journal of Electronics & Information Technology, 2019, 41(2): 309-316. doi: 10.11999/JEIT180119
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At present, long-code with the characteristic of high bit rate and long period is widely used in satellite navigation system as military signal. To overcome the shortcomings of the indirect acquisition method for long-code, the limitations of the extended replication overlay acquisition algorithm and the mean acquisition algorithm, an improved time-frequency capture method based on the Extended replica Folding Acquisition Search Technique (XFAST) and the mean algorithm is proposed. The feasibility of the algorithm is simulated and the performance of the algorithm is analyzed. The simulation experiment shows the superiority of the proposed algorithm.
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