Design methodology of high-security ranging codes for radio navigation systems

Ranging code occupies an important position in the radio navigation system based on code division multiple access, and the existing ranging code sequences generated by the traditional method cannot effectively meet the needs of radio navigation system on the security of ranging code. In order to further improve the safety performance of radio navigation system, a type of Weil code sequence based on time-hopping as the design scheme of ranging code for radio navigation system is proposed. On the basis of the traditional Weil code, a new Weil code sequence is generated by confirming the parameters of the code sequence at the time of code change through the random mode, and then the starting parameters of the truncated code piece are confirmed through the information of the time of code change to perform the splicing operation on the code sequence. The simulation results show that compared with the traditional ranging code, the proposed time-hopping Weil ranging code sequence effectively improves the safety performance of radio navigation system without reducing the correlation and has better bit error rate performance, and meets the performance requirements of radio navigation system on ranging code.