电子学报2011，Vol.39Issue(7)：1491-1496,6.
一种可克服非相干数据影响的直扩信号捕获算法
A DS-SS Signal Acquisition Algorithm for Overcoming the Impact of Non-Coherent Data Modulation
赵春燕 1崔嵬1
作者信息
- 1. 北京理工大学信息与电子学院,北京100081
- 折叠
摘要
Abstract
This paper proposes a kind of acquisition algorithm for Direct Sequence Spread Spectrum (DS-SS) signal, which can overcome the adverse impact of the non-coherent data modulation effectively. In the algorithm,the received signal is multiplied by its delay conjugate result to eliminate the impact of the data transition.Then the Fast Fourier Transform (FFT) is used to calculate the circular correlation to estimate the PN code phase. After that, we use the estimate result of the PN code phase to despread the received signal and get the estimate of the Doppler frequency, which is achieved by frequency spectrum analysis with FFT. Theoretical analysis and simulation results show that, compared with the traditional algorithms, the proposed algorithm is not sensitive with the moment the data transition occurs and it saves the acquisition time significantly.The algorithm proposed in this paper can be applied to capture high-speed non-coherent data modulated signals.关键词
非相干数据位调制/快速傅立叶变换（FFT）/延迟共轭相乘/捕获时间/信噪比损失Key words
non-coherent data modulation/fast Fourier transform (FFT)/delay conjugate multiply/acquisition time/signal to noise ratio(SNR) loss分类
信息技术与安全科学引用本文复制引用
赵春燕,崔嵬..一种可克服非相干数据影响的直扩信号捕获算法[J].电子学报,2011,39(7):1491-1496,6.
