Research Article
Design of Acquisition Algorithm Based on a Novel Detector for Weak GNSS Signals
@INPROCEEDINGS{10.1109/ChinaCom.2011.6158184, author={Yingjie Shen and Minjian Zhao and Jie Zhong and Yunfei Li and Huazi Zhang}, title={Design of Acquisition Algorithm Based on a Novel Detector for Weak GNSS Signals}, proceedings={6th International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={3}, keywords={high sensitivity acquistion detector doppler effect}, doi={10.1109/ChinaCom.2011.6158184} }- Yingjie Shen
Minjian Zhao
Jie Zhong
Yunfei Li
Huazi Zhang
Year: 2012
Design of Acquisition Algorithm Based on a Novel Detector for Weak GNSS Signals
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2011.6158184
Abstract
An acquisition algorithm based on a novel detector is proposed for weak GNSS signals in this paper. In traditional receivers, the over-threshold detection on amplitude or peak-to-mean ratio is usually employed for signal acquisition. Instead, the proposed novel detector exploits peak positions of successive multiple detections covering a full range of code phase offset to refine the detection performance. A self-adaptive method to dynamically adjust integration time for various signal strength is employed to further enhance the acquisition efficiency.Simulation results demonstrate that the proposed algorithm is capable of acquiring the signal when the Carrier-to-Noise Ratio is as low as 22dB-Hz, fixing the residual Doppler offset at the worst situation.