Improved performance of composite pseudo-code ranging between satellite links

The article focuses on the modulation and acquisition of composite pseudo-random codes. Firstly, the generation, modulation and tracking of Tausworthe code are introduced. Secondly, the Tausworthe code forming method is studied in depth. The cosine-square wave forming method of composite pseudo-code is designed by means of comparative analysis and simulation verification, which improves the performance of modulated pseudo-code in channel transmission. Finally, by analyzing the defects of the traditional phase capture method, the Tausworthe code capture method is improved. The analysis shows that the improved capture method does not increase the total capture time, but greatly reduces the complexity of the receiving module, which has certain reference value in intersatellite links.