전파간섭 신호에 의한 소프트웨어 GPS 수신기 성능 분석

Abstract

In this paper, the effect of interferences on the GPS weak signal is analyzed by the carrier to noise ratio(C/No) which is the ratio of the received carrier power level to the noise power level in a 1Hz unit. The C/No is an important parameter describing the performance of a GPS receiver and an indicator of the quality of the received signal. To receive the GPS weak signal, adaptive acquisition method using differential coherent integration is implemented to the software GPS receiver and FLL discriminator is applied to the signal tracking loop. The proposed algorithm is verified by simulation, and the effect of the interference on signal is provided by theoretical results of the carrier to noise ratio.