跳频系统中基于伪随机映射的快速交织器  

Fast Interleaver Based on Pseudo-Random Mapping in FH System

作　　者：刘飞[1] 万佳君[1] 李峰 LIU Fei;WAN Jiajun;LI Feng

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2021年第3期199-204,共6页Modern Navigation

摘　　要：为解决伪随机行列循环移位交织器在交织矩阵行数与列数不平衡时交织性能退化的问题,提出了一种基于伪随机映射的快速交织器,在伪随机循环移位之前对交织矩阵的行序进行映射置乱,从而改善交织的分散与混乱特性。数据分析与仿真结果表明,所提交织器在行列数不平衡时仍然具有较好的散乱特性,与随机交织器相当,并实现简单,支持快速交织与解交织操作,在使用Turbo码的跳频通信系统受到部分时段压制干扰时,误码性能可达到随机交织器水平,优于分组交织器和互质交织器等其他常规交织器,在40%部分时段压制干扰下10e-5误码率时,较伪随机行列循环移位交织器能提升0.6 dB的抗干扰增益,适用于脉冲数与脉冲长度不平衡的跳频系统。To overcome the problem of interleaving performance deterioration in the pseudo-random row-column cyclic shift interleaver with unbalance between the number of rows and columns of interleaving matrix,a fast interleaver based on pseudo-random mapping is proposed,in which the discreteness and chaotic is improved by scrambling the row number of interleaving matrix before pseudo-random row-column cyclic shifting.The simple implementation,fast calculation and the same excellent performance as the random interleaver of PMFI is shown in theoretical analysis and simulation results.In FH System used Turbo codes under the condition of partial-time noise jamming,PMFI outperforms the common interleaver such as block interleaver,relative prime interleaver et al on bit error rate performance,and improves the anti-jamming gain about 0.6 dB than PRCSI at BER of 10e-5 under the condition of 40%PTNJ.The proposed PMFI could be applied to FH system with unbalance between pulses number and pulse length.

关 键 词：跳频通信 部分时段干扰 TURBO码 交织器 行序伪随机映射 

分 类 号：TN914.41[电子电信—通信与信息系统]