Research on PN phase modulation and PAM combined ranging system
Huichang Zhao · Journal of Astronautics · 2004
In this paper,the principle of PAM pseudonoise code is introduced,and its autocorrelation function and power spectrum are deduced in detail.Furthermore,their characters are analyzed on the basis of their figures.Thereafter,combined ranging system is designed,and the formula of signals in every aspects over an additive white Gaussian noise channel is deduced.At last,the performance of combined ranging system is researched,and the SNR gain is deduced in detail.The results show that combined ranging system has stronger performance of ECCM and better capacity of ranging than usual PN ranging systems.