Impact of finite bandwidth for inter-satellite ranging using direct sequence spread spectrum signal

Distance information is useful for satellite constellation. Evaluating the accuracy of spread spectrum receiver under finite bandwidth is still hard and few researches focus on that. In this paper, we build the signal model of DSSS signal under finite bandwidth, and then derive the mathematic form of error function. Furthermore, we propose the error factor, which is decided by bandwidth and early-to-late correlator space. Finally, we conclude that the error factor gradually oscillates to a steady value with the bandwidth increase; the error decreases with a smaller correlator space if the bandwidth is large enough, but might increase if the bandwidth is relative narrow. Simulation results verify the effectiveness of our analysis.