一种解决时频不确定问题的长码捕获算法

doi:10.7527/S1000-6893.2013.0218

Abstract

Abstract:

A long code acquisition algorithm was proposed to solve the uncertainty problems of long code signal acquisition in time-frequency domain, based on the theoretical model analysis. The technologies of time domain mixing and add were applied, and the technology of frequency domain circular moving was applied to overcome the correlation peak uncertainty problems caused by frequency deviation. At the same time, the technologies of continuous accumulating and batch processing were applied to resolve the pseudo-code time uncertainty problems caused by the transceiver clock error and the correlation peak uncertainty problems caused by data inversion. Theoretical analysis and simulation results show that the proposed algorithm can overcome the time-frequency domain uncertainty problem under the condition of larger than －25 dB. Further, the processing precision and complexity of the algorithm is better than the traditional algorithm.

Key words: long cycle pseudo-random code, signal acquisition, correlation peak, time-frequency domain analysis, uncertainty analysis

CLC Number:

LIU Fang, FENG Yongxin. A Long Code Acquisition Algorithm on Resolve Time-frequency Uncertainty Problem[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(8): 1924-1933.

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A Long Code Acquisition Algorithm on Resolve Time-frequency Uncertainty Problem

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