单载波频域均衡系统研究

摘要

为了对抗无线信道传输的多径效应和码间干扰(ISI)，采用了SC⁃FDE(单载波频域均衡)技术。在系统仿真中，发送端发送连续的基于UW 的数据帧结构，通过多径瑞利信道和高斯白噪声信道，在接收端采用滑动窗原理先进行帧同步检测，后采用最小二乘(LS)算法进行频域均衡，获得系统的误码率曲线图，验证了单载波频域均衡技术具有对抗多径效应和码间干扰的特点。%The SC⁃FDE(single carrier transmission with frequency domain equalization) technology is used to overcome the channel multi⁃path effect and ISI(Inter⁃Symbol Interference) of the wireless broad band transport system. In the system simulation,the consecutive frames with ideal training sequences(UW)get through the channel compounded with the multipath Rayleigh fading channel and AWGN channel,and first the frame synchronization is solved by sliding window theory and then LS algorithm is adopted for frequency domain equalization in the receiver. Finally,the BER(bit error rate)of the scheme is got and the simulation result proves that the scheme has good performance in multi⁃path effect and ISI.