基于多相滤波器组的Chirp-UWB多径信号解调实现  

Implementation of Chirp-UWB multipath signal demodulation based on polyphase filter banks

作　　者：孔泽华[1] 康荣宗[1] 万磊[1] 刘洛琨[1] 

机构地区：[1]解放军信息工程大学通信工程系,河南郑州450002

出　　处：《计算机工程与设计》2011年第1期71-74,共4页Computer Engineering and Design

基　　金：国家863高技术研究发展计划重点基金项目(2009AA011205)

摘　　要：针对低信噪比下大带宽、复杂多径的信号接收环境,在分析Chirp信号时频耦合特性的基础上,结合多径信号频域分离思想和雷达去斜处理方法,设计了基于正交去斜及多相滤波的Chirp-UWB多径信号解调结构,给出了FPGA内部的系统流程及模块实现方案。仿真验证结果表明,硬件结构简单高效地完成了Chirp-UWB多径信号的并行解调。The characteristics of Chirp-UWB signal are analyzed.Aimed at the difficulties of large bandwidth,complex multipath environment in low SNR,using the idea of separatingmulti-path signals in frequency domain and de-chirp technology in radar for reference, the demodulation structure based on the orthogonal de-chirp and polyphase filter are designed.The flow of system structure and the realization of inner modules are proposed.The computer simulation shows that the hardware structure which is simple and efficient realizes parallel demodulation of multi-path signals.

关 键 词：线性调频信号 超宽带 去斜处理 正交 多相滤波 现场可编程门阵列 

分 类 号：TN913.2[电子电信—通信与信息系统]