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IR-UWB系统中的密集多径和随机的时延扩展带来了严重的码间干扰,若不采取均衡技术抑制码间干扰,将严重限制系统的性能。针对接收机的位置改变能引起信道模式改变,设计了一个新型的MF-DFE接收机,根据传输速率信息和判决设备得到的信道模式的信息,在快时变的混合信道下,动态的配置判决反馈均衡器的长度进行均衡接收。仿真表明该接收机在快时变的IR-UWB混合信道情况下,在高的传输速率下仍能获得良好的性能。
Dense multi-path and random delay spread in IR-UWB system bring serious intersymbol interference, which will severely limit the performance of the system if the equalization technique is not used to suppress intersymbol interference. A new type of MF-DFE receiver is designed for the change of channel position caused by the change of receiver position. Based on the information of transmission rate and the channel mode obtained by the decision device, the dynamic configuration decision Equalize the length of the feedback equalizer. Simulations show that the receiver can still achieve good performance at high transmission rates in the case of fast IR-UWB mixed channels.