基于OCML构造序列的Link16扩频方法

doi:10.12305/j.issn.1001-506X.2022.12.29

Abstract

Abstract:

Link16 data chain is applied to major combat platforms with its strong anti-interference ability, but the transmission rate and utilization of Link16 are low. For this problem, a truncated code shift keying(TCSK) method based on one-way coupled map lattice(OCML) spatiotemporal chaotic sequence is proposed in this paper. The system uses spatiotemporal chaotic sequence under the OCML model as base code, then shortens the length of each chip which carries information to the original 1/P, and mirrors each chip symmetrically to obtain a spread spectrum chip with a total length of 2/P to transmit. Compared with the original sequence, the length of this chip reduces by half to improve the transmission rate of the system. OCML sequences have great pseudo randomness and autocorrelation, and many spread spectrum sequences can be generated under the model, each sequence is unique, so one channel can acommodate lots of spread spectrum signal, which improves the efficiency of bandwidth tremendously. The bit error rate (BER) performance in multipath channel model is simulated, and the simulation results show that the scheme can effectively improve performance of system under multipath fading.

Key words: Link16 data chain, one-way coupled map lattice (OCML), truncated code shift keying (TCSK), transmission rate, multipath fading

CLC Number:

TN919.3

Hailing LUO, Xiaoyan NING, Kaifeng GUO, Ming DIAO. Link16 spread spectrum method based on OCML construction sequence[J]. Systems Engineering and Electronics, 2022, 44(12): 3837-3842.

Figures/Tables 10

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References 15

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算法步骤	CCSK	OCML-TCSK
映射矩阵构造	0.003 514	0.005 489
相关值计算	0.205 368	0.101 185
最大相关值索引	0.034 959	0.026 961

扩频方式	频带利用率
CCSK	0.156 2
OCML-TCSK	0.312 5

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Link16 spread spectrum method based on OCML construction sequence

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