中图分类号：TN961
文献标识码：A
DOI： 10.19358/j.issn.2096-5133.2020.04.011
引用格式：臧志斌，夏传福，吴小鸥,等.基于FPGA的北斗三号卫星B2a码发生器实现［J］.信息技术与网络安全，2020,39（4）：58-62.

Implementation of Beidou-3 satellite B2a code generator based on FPGA

Abstract： The local copy ranging code is of great importance to satellite signal acquisition and tracking.According to the newly launched Beidou3 satellites in China,a method to realize the B2a signal ranging code generator by FPGA was proposed.Based on B2a signal ranging code generator of Beidou3,the design principle of B2a ranging code generator was explained in detail,including the analysis of key modules of Weil code and Gold code generator.A scalable Beidou3 ranging code generator was designed and implemented by using FPGA,through the reserved register initialization interface,the ranging codes of different PRN satellites can be generated,and the complicated problem of generating any satellite ranging codes can be solved.The design has certain reference meaning for the design of the navigation receivers of Beidou-3.

Key words : Beidou-3;B2a;ranging code;FPGA;PRN code;hierarchical code;pilot channel