Quantization Effect on BeiDou Signal in Jamming Environment

Abstract

The radio frequency interference has become a rising problem to the signal of BeiDou Navigation Satellite System (BDS). Many researchers have analyzed the impact of jammer on the loss of Signal to Noise Ratio (SNR) of receivers after post-correlation. On the other hand, as the first section of receiver to perform the analog-to-digital conversion, quantizer is also influenced by the jamming signal and will cause a loss of SNR as well. In this paper, the effect of quantization on SNR of BDS signal is analyzed based on the theory of random signal processing, and the effects of continuous wave interference and wide-band interference on quantization loss are analyzed as well. The deduction result shows that the quantization loss of BDS signal is related to the wei-ghted probabilities, and the presence of jammer enhances the misjudgment rate so that increasing the quantization loss. The simulation result shows that the quantization loss of receiver will significantly increase because of jamming signal, and the loss is also positive related to the power of jammer.