多天线系统频域信道估计算法的研究  

Research on Frequency Domain Channel Estimation Algorithm in Multi-Antenna Systems

作　　者：赵谦[1] 闫红梅[1] 曾召华[1] 付鹏[1] 

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710054

出　　处：《计算机仿真》2011年第3期163-165,202,共4页Computer Simulation

基　　金：陕西省教育厅专项科研计划项目:LTE基站多天线关键技术的研究(09JK596)

摘　　要：在天线性能优化问题的研究中,MIMO-OFDM技术将OFDM与空时编码技术有机的结合在一起,能够大幅度的提高无线通信系统的信道容量和传输速率。为了有效地抵抗多径衰落、抑制干扰和噪声,提出了一种改进的LS频域信道估计的改进算法即分组LS频域信道估计算法。算法根据MIMO-OFDM系统相邻子载波频域信道响应变化缓慢的结论,把所有天线发送的OFDM子载波分成多组来进行信道估计。通过对算法的仿真建模并进行仿真,表明算法具有简化算法复杂度以及提高抗噪声和信道估计能力,在抗多普勒频移等方面有更好的性能。算法可为多天线系统信道估计的研究提供了设计依据。As a combination of OFDM with space time coding technique,MIMO-OFDM has recently received considerable attentions,which can not only effectively enhance the transmission rate and capacity of the wireless communication system,but also effectively combat multi-path fading and interfere.The paper mainly puts forward an improved algorithm based on LS frequency domain channel estimation algorithm,that is,Packet LS frequency domain channel estimation algorithm,which analyzed specifically principle,performance and feasibility based on the simulation with MATLAB.This method is anti-noise and anti-Doppler frequency shift,can eliminate the negative impact of noise and improve channel estimation capabilities,and so has a good performance.This algorithm provides a new research idea for channel estimation in multi-antenna systems research.

关 键 词：多输入多输出 正交频分复用 信道估计 最小均方 

分 类 号：TN929.5[电子电信—通信与信息系统]