GNSS Anti-jamming Receiving Technology Based on Batch Processing According to CDMA Signals Intensity

来源 :第十届中国卫星导航学术年会 | 被引量 : 0次 | 上传用户:li13688
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  The code division multiple access (CDMA) is widely used in GNSS. Although its spectrum utilization efficiency is high, serious multiple access interference is caused by strong deception jamming signals, which make it difficult for navigation receivers to capture real satellite navigation signals with weak power. So the anti-deception receiving and processing are very impracticable. In order to solve these problems, the batch processing method based on CDMA signals intensity is proposed. Firstly, the strong signals are captured and tracked, and their waveforms are reconstructed by the de-spread and demodulated results of each strong signal. Then the strong signals are eliminated by subtracting the reconstructed signals out of the mixed ones. Through above processing, the satellite navigation receiver can reduce the additional suppression effect caused by deception signals with strong power, and find out the real satellite navigation signals which are concealed by the deception ones. It provides more complete measurement data for the deception signals identification and elimination, as well as the pseudo-range measurement and positioning solution based on the real navigation satellite signals. The validity and practicability of the above method is verified by simulations. It provides a new technique approach for GNSS anti-jamming and anti-deception processing.
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