基于认知的UWB窄带干扰抑制

Narrowband Interference Suppression in UWB System Based on Cognitive Radio

提出一种基于认知无线电的自适应超宽带窄带干扰抑制方法。基于软频谱思想,利用近似椭球波函数良好的时限-带限特性,设计出一种能够抑制窄带干扰的脉冲波形。通过调整脉冲参数实现对授权频段的动态避让。仿真结果表明:自适应脉冲具有良好的窄带干扰抑制能力,能够自适应地随着感知结果动态地规避授权用户,从而实现UWB系统与其它通信系统的共存。

A novel adaptive ultra-wideband（UWB） narrowband interference suppression method based on cognitive radio（CR） theory is presented.The pulse waveforms are designed using the soft spectrum adaptation（SSA） method,with approximate prolate spheroidal wave functions（APSWFs） which has time domain-frequency property.According to tune the parameters of APSWF,the pulses could adapt to the changed radio frequency environment.The simulation results show that the adaptive pulse suppresses the narrowband interferences effectively,avoids the authorized users dynamically as the sense results and solves the coexistence problem between UWB system and other existing communication systems successfully.