无线电导航系统高安全性测距码设计方法

doi:10.12305/j.issn.1001-506X.2026.04.30

Abstract

Abstract:

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.

Key words: radio navigation system, Weil code, security, correlation, bit error rate

CLC Number:

TN 966.4

Shangzhen DU, Chengyan HE, Zhaolin ZHANG, Yandong SUN, Ling WANG. Design methodology of high-security ranging codes for radio navigation systems[J]. Systems Engineering and Electronics, 2026, 48(4): 1413-1421.

Figures/Tables 11

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References 37

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PRN	w	p	头24个码片（八进制）	末尾24个码片（八进制）
1	2671	691	05022210	24537642
2	3847	711	05502063	76611634
3	4802	9979	56654232	70414644
4	4330	10158	46215330	33611323
5	4145	5760	52744646	21605066
6	889	6821	74243007	10223727
7	3201	697	52225774	73004554
8	2544	1626	45137341	76410511
9	4572	709	51601033	30746504
10	3642	6342	47606167	65641033
11	1840	6860	22401272	61656370
12	189	2668	42003255	37777054
13	278	7705	46765776	23416134
14	3690	824	52726143	60614647
15	3344	447	56571524	04422702

码型	最大旁瓣能量	均值	标准差
Gold码序列	26.9802~30.2313	28.8002	0.6371
传统Weil码序列	29.9598~32.2387	31.4508	0.4531
基于时间跳变Weil码序列	29.1441~31.6025	30.5629	0.4860

码型	0 dB	10 dB	20 dB
Gold码序列	0.1617	0.0056	5.74×10⁻⁴
传统Weil码序列	0.1626	0.0050	6.517×10⁻⁵
基于时间跳变的Weil码序列	0.1612	0.0028	3.91×10⁻⁵

码型	0 dB	10 dB	20 dB
Gold码序列	0.921	0.598	0.523
传统Weil码序列	0.869	0.603	0.536
基于时间跳变的Weil码序列	0.879	0.601	0.517

码型	安全性能（LZ复杂度均值）
Gold码序列	1.0287
传统Weil码序列	1.0218
基于时间跳变Weil码序列	2.4449

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

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