天线映射规则伪随机变化的新型空移键控系统

摘要

在传统的空移键控技术基础上，对天线映射规则进行伪随机改变，旨在探索一种新的抗截获通信方式。重点分析了所提方案的实现原理及天线映射结构，并计算了其误码率联合上界；接收端采用最大似然算法，确保了天线位置序号能被正确检测。性能仿真表明，该方案的传输性能取决于发送与接收天线数目，而与所选取天线映射规则的个数无关。最后，从窃听方破译天线序列复杂性的角度出发，证明了系统具有很好的反侦察、抗截获性能。%Based on the traditional Space Shift Keying(SSK) technology,this paper changes the antenna mapping rule pseudo-randomly in order to explore a new anti-interception communication way. The prin-ciple of the proposed scheme and antenna mapping structure are emphatically analyzed, and the upper bounds of bit error rate( BER) of the proposed scheme are calculated. The Maximum-Likelihood( ML) al-gorithm adopted by the receiver ensures that the antenna position can be detected correctly. Performance simulation shows the transmission performance depends on the numbers of sending and receiving antennas, and has nothing to do with the numbers of selected antenna mapping rules. Finally,it is proved that the sys-tem has good counter-reconnaissance and anti-interception performance from the aspect of complexity of eavesdroppers deciphering antenna sequences.