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首页> 外文期刊>Journal of electrical and computer engineering >Adaptive Jamming Suppression in Coherent FFH System Using Weighted Equal Gain Combining Receiver over Fading Channels with Imperfect CSI
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Adaptive Jamming Suppression in Coherent FFH System Using Weighted Equal Gain Combining Receiver over Fading Channels with Imperfect CSI

机译：具有不完善CSI的衰落信道上加权平均增益合并接收机的相干FFH系统中的自适应干扰抑制

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摘要

Fast frequency hopping (FFH) is commonly used as an antijamming communication method. In this paper, we propose efficient adaptive jamming suppression schemes for binary phase shift keying (BPSK) based coherent FFH system, namely, weighted equal gain combining (W-EGC) with the optimum and suboptimum weighting coefficient. We analyze the bit error ratio (BER) of EGC and W-EGC receivers with partial band noise jamming (PBNJ), frequency selective Rayleigh fading, and channel estimation errors. Particularly, closed-form BER expressions are presented with diversity order two. Our analysis is verified by simulations. It is shown that W-EGC receivers significantly outperform EGC. As compared to the maximum likelihood (ML) receiver in conventional noncoherent frequency shift keying (FSK) based FFH, coherent FFH/BPSK W-EGC receivers also show significant advantages in terms of BER. Moreover, W-EGC receivers greatly reduce the hostile jammers' jamming efficiency.
机译：快速跳频（FFH）通常用作抗干扰通信方法。在本文中，我们为基于二进制相移键控（BPSK）的相干FFH系统提出了有效的自适应干扰抑制方案，即具有最佳和次佳加权系数的加权等增益组合（W-EGC）。我们用部分频带噪声干扰（PBNJ），频率选择性瑞利衰落和信道估计误差来分析EGC和W-EGC接收机的误码率（BER）。特别是，封闭形式的BER表达式以二阶多样性表示。我们的分析通过仿真验证。结果表明，W-EGC接收器明显优于EGC。与基于常规非相干频移键控（FSK）的FFH中的最大似然（ML）接收器相比，相干FFH / BPSK W-EGC接收器在BER方面也显示出显着优势。此外，W-EGC接收器大大降低了敌对干扰机的干扰效率。

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  • 来源
    《Journal of electrical and computer engineering》 |2015年第2015期|687874.1-687874.8|共8页
  • 作者

    Yishan He; Yufan Cheng; Gang Wu; Binhong Dong; Shaoqian Li;

  • 作者单位

    National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China;

    National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China;

    National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China;

    National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China;

    National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China;

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