一种超宽带模拟合并转发协作通信系统

针对频率选择性衰弱信道下协作通信系统信道估计复杂的问题，提出了一种模拟合并 放大转发超宽带（UWB）协作通信方案。该方案在源节点处对发送符号进行实数分布式空时 编码并附加传输参考，在中继节点处利用传输参考对多径分量进行模拟合并，从而构建了一 种改进型非正交放大转发协作通信系统。仿真结果证明，相对于无协作通信系统，模拟合并 转发协作系统无需信道估计就可获得传输性能的有效提升。

An Ultra-wideband Analog Combination and Forward Cooperative Communication System

In allusion to the complexity channel estimation of cooperative communication system over frequency-selective fading channels,a scheme of analog combinatio n and forward ultra-wideband (UWB) cooperative communication is proposed. The tr ansmitting symbol is coded by real space-time code and the transmitted reference is appendded at source node,the multipath components are analog combined by a pplying the transmitted reference at relay node, then a modified non-ort hogonal amplify-and-forward cooperative communication system is construed. The s imulation results show that compared to the non-cooperative communication, the t ransmission ability of analog combination and forward cooperation system can be efficiently improved without channel estimation.