一种基于预编码的MIMO-FDE系统盲信道估计算法.doc

一种基于预编码的MIMO-FDE系统盲信道估计算法.doc一种基于预编码的MIMO-FDE系统盲信道 估计算法
摘要：输入多输出(MIMO)技术是LTE/LTE-A系统一个至关重要的技术，它可以在不增加 带宽和发送功率前提下，显著地提升信道容量和提高频谱利用率。同时，以正交频分复用 (OFDM)技术为代表的频域均衡技术(FDE),可以有效地抵抗频率选择性衰落的影响并 且降低接收机设计的复杂度。本文利用一种线性非冗余块预编码技术，提出了一种在 MIMO-FDE系统中盲信道估计算法。该算法在现有子空间分解法基础上，加入预编码理论， 有效降低了系统的误码率。仿真结果表明该算法能够准确的估计出信道的状态信息，有利于 在 MIMO-FDE系统中的实现。
关键词：盲信道估计；块预编码；MIMO-FDE 中图分类号：请查阅《中国图书馆分类法》
Blind Channel Estimation for MIMO-FDE Systems via a
Precoding
Geng Xin
(School of Information Science &Engineering, Lanzhou University, Lanzhou,730000) Abstract: Multiple Input Multiple Output(MIMO) technology, which can dramatically improve the channel capacity and achieve high efficiency of spectrum without increasing bandwidth and the transmission power, plays an essential role in the LTE/LTE-A systems. The frequency domain equalization(FDE) technology, which represented as orthogonal frequency division multiplexing (OFDM),can effectively combat multi-path fading and have low complexity to receiver design. In this paper, we propose an blind channel estimation for MIMO-FDE system by utilizing a linear nonredundeant block precoding. With precoding theory, the proposed algorithm can effectively reduce the BER of MIMO-FDE system. Experiments prove that this algorithm has excellent performance on property of algorithm and complextiy. And it beneficial to the realization in MIMO-FDE system.
Key words: blind channel estimation; block precod