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Proceedings Paper

Joint code acquisition and Doppler shift estimation method for DSSS-MSK signal
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Paper Abstract

Acquisition of Direct Sequence Spread Spectrum-Minimum Shift Keying (DSSS-MSK) signal in low signal to noise (SNR) and high dynamic environment will impact the overall performance of the receiving system seriously. The proposed all-digital IF receiver has a serial structure, transforming the DSSS-MSK signal into approximating DSSSBPSK signal using the matched filter. The matched filter is designed according to the known frequency response based on convex optimization. Then, the signals are regrouped by spreading code period. Finally, combining Doppler frequency shift compensation with the parallel code acquisition algorithm based on FFT, the PN code phase difference and Doppler frequency shift are captured simultaneously. Simulation results show that the proposed algorithm has 7dB and 8dB SNR improvement than delay correlation method and ML-FFT method respectively. Furthermore, the proposed algorithm has quick acquisition rate, wide acquisition range, high acquisition accuracy, low complexity and is suitable for low SNR environment.

Paper Details

Date Published: 17 April 2019
PDF: 9 pages
Proc. SPIE 11071, Tenth International Conference on Signal Processing Systems, 110710E (17 April 2019); doi: 10.1117/12.2516152
Show Author Affiliations
Renhong Xie, Nanjing Univ. of Science and Technology (China)
Science and Technology on Communication Networks Lab. (China)
Bingxiu Wang, Nanjing Univ. of Science and Technology (China)
Wen Qiu, Nanjing Univ. of Science and Technology (China)
Shuai Qiao, Nanjing Univ. of Science and Technology (China)
Weiwei Zhu, Nanjing Univ. of Science and Technology (China)
Yibin Rui, Nanjing Univ. of Science and Technology (China)
Peng Li, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 11071:
Tenth International Conference on Signal Processing Systems
Kezhi Mao; Xudong Jiang, Editor(s)

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