信息管理中UWB系统信道估计与均衡算法及实现

通过介绍UWB技术的发展现状,着重阐述了MB-OFDM UWB通信系统的物理层帧结构和信道模型。在分析最小二乘(LS)信道估计算法和基于快速傅里叶变换(FFT)信道估计算法的基础上,针对MB-OFDM UWB信号帧结构特征提出了一种基于FFT变换和Hannan-Quinn(HQ)准则的改进算法,即FFT-HQ信道估计算法。该文也提出了一种基于信道估计的自适应均衡算法,利用仿真可以看出此均衡算法在性能上优于传统的基于LS算法调整均衡器系数的方法。

Channel estimation,equalization algorithm and realization of UWB system in information management

The development situation of UWB technology is introduced. The frame structure in physical layer and the chan-nel model of the MB - OFDM UWB communication system are elaborated emphatically. Based on the analysis of the least-squares （LS） channel estimation algorithm and FFT-based channel estimation algorithm,FFT - HQ channel estimation algo-rithm,which is an improved algorithm based on FFT and Hannan-Quinn（HQ）criterion,is put forward according to the struc-tural features of MB-OFDM UWB signal frame. An adaptive equalization algorithm based on channel estimation is also proposed in this paper. It can be seen by simulation that the performance of the equalization algorithm is superior to the traditional method based on LS algorithm to adjust the equalizer coefficients.