According to the signal-to-noise ratio （SNR） loss of averagealgorithm. in direct P-code acquisition method, this paper analyzes the SNR performance of the overlapaveragealgorithm.quantitatively, and derives the r...
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According to the signal-to-noise ratio （SNR） loss of averagealgorithm. in direct P-code acquisition method, this paper analyzes the SNR performance of the overlapaveragealgorithm.quantitatively, and derives the relationship of SNR loss with overlap shift value and initial average phase difference in the overlapaveragealgorithm. On this basis, the bidirectionaloverlapaveragealgorithm.based on optimal correlation SNR is proposed. The algorithm.maintains SNR consistent in the entire initial average phase difference space, and has a better SNR performance than the overlapaveragealgorithm. The effectiveness of the algorithm.is verified by both theoretical analysis and simulation results. The SNR performance of the bidirectionaloverlapaveragealgorithm.is 5 dB better than that of the direct average algorithm, and 2 dB better than that of the overlapaveragealgorithm. which provides the support for direct P-code acquisition in low SNR.
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