基于Teager-Kaiser 算子的差分码移参考超宽带接收机

为提升差分码移参考DCSR(Differential Code Shifted Reference)超宽带接收机在窄带干扰环境中的接收性能,提出了一种基于Teager-Kaiser算子(TKO)的改进型DCSR接收机结构.通过TKO的非线性处理,可以使窄带干扰能量集中在直流附近的低频段,从而可以通过一个模拟高通滤波器将其滤除.仿真结果表明本文提出的改进结构可以有效地抑制窄带干扰,并且在不存在窄带干扰的环境中其性能仍优于传统的差分码移参考接收机和传输参考接收机.改进后的TKO-DCSR性能提升明显且实现复杂度增加不多,可以较好地满足无线传感器网络的应用需求.

Differential Code Shifted Reference UWB Receiver Based on Teager-Kaiser Operator

In order to improve the performance of differential code shifted reference(DCSR)UWB receiver in the presence of narrowband interference(NBI),a new improved DCSR receiver based on Teager-Kaiser operator(TKO)is proposed.By using the nonlinear TKO,the NBI is shifted to a frequency band close to DC,and hence can be removed by a following analog high pass filter.The simulation results show that the proposed receiver can greatly mitigate the narrowband interference(NBI),even in the scenario that no NBI exist the proposed receiver still outperform the original DCSR and TR receiver.Comparing with the original DCSR,the TKO-DCSR receiver achieves significantly performance improvement at the cost of a little increase in complexity,this advantage makes it a promising technology for wireless sensor networks.