基于LDPC-FFT-DSSS的通用宽带数据链上行链路NBJ抑制方案

A narrowband jamming suppression scheme on common data link uplink based on LDPC-FFT-DSSS

针对现阶段通用宽带数据链窄带干扰(Narrow Band Jamming,NBJ)抑制中信噪比要求高的问题,该文提出了一种基于LDPC-FFT-DSSS的宽带数据链上行链路的NBJ抑制方案,分析了方案的实现过程,完成了不同条件下的窄带干扰抑制仿真。结果表明:该方案在较低信噪比条件下不仅对单音干扰有良好的抑制功效,更有效抑制了多音干扰,在现有通用宽带数据链的误码率条件下,当干信比为30dB时,该方案可以获得的信噪比增益至少为8dB。

A narrowband jamming suppression scheme on common data link uplink with LDPC-FFT-DSSS is proposed and analyzed through the model for NBJ suppression at low SNR. Simulation on NBJ suppression is accomplished in different jamming condition. Simulation results indicate that the jam suppression scheme is efficacious in the single tone jamming and 7 ,xnulti-tone jamming at low SNR. When JSR is 30dB, the scheme brings 8dB SNR gain comparing with the current standard of CDL uplink.