OFDM系统多音干扰抑制性能分析
Performance analysis of multitone jamming suppression in OFDM
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摘要: 对随机相位多音干扰进行了建模,分析了OFDM系统对多音干扰的抑制性能,推导给出了在相干解调的OFDM系统中随机相位多音干扰的误码率与信干比的反线性下降之间的关系,并对卷积编码和分集合并带来的系统性能改善进行了分析.理论推导和仿真显示,尽管多音干扰难以消除,但通过频域分集或卷积编码的OFDM系统,可以有效抑制这种干扰.Abstract: A random phased multitone jamming model was presented and the performance of multitone jamming suppression in OFDM was analyzed.In the OFDM system of the coherent demodulation,BER and signal to interference ratio followed the reverse linear decline of relationship in multitone interference with random phase.And the performance of convolutional encoding and diversity combining was analyzed. Both theoretical expressions and simulations showed that though multitone jamming is harmful to OFDM,diversity and convolutional encoding can suppress the jamming effectively.
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