现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
7期
1-4,8
,共5页
MIMO-OFDM%信道估计%TBT%快速求解算法
MIMO-OFDM%信道估計%TBT%快速求解算法
MIMO-OFDM%신도고계%TBT%쾌속구해산법
MIMO-OFDM%channel estimation%TBT%fast solution method
提出了一种基于MMSE准则的MIMO-OFDM系统信道估计简化方法。该方法将信道估计问题转化为TBT线性方程求解问题，然后利用快速求解算法避免了复杂的矩阵求逆和矩阵相乘，大大降低了实现复杂度。仿真结果表明，相比于传统MMSE算法，该简化算法在降低复杂度的同时仅带来微弱的性能损失。
提齣瞭一種基于MMSE準則的MIMO-OFDM繫統信道估計簡化方法。該方法將信道估計問題轉化為TBT線性方程求解問題，然後利用快速求解算法避免瞭複雜的矩陣求逆和矩陣相乘，大大降低瞭實現複雜度。倣真結果錶明，相比于傳統MMSE算法，該簡化算法在降低複雜度的同時僅帶來微弱的性能損失。
제출료일충기우MMSE준칙적MIMO-OFDM계통신도고계간화방법。해방법장신도고계문제전화위TBT선성방정구해문제，연후이용쾌속구해산법피면료복잡적구진구역화구진상승，대대강저료실현복잡도。방진결과표명，상비우전통MMSE산법，해간화산법재강저복잡도적동시부대래미약적성능손실。
A simplified channel of estimation method for MIMO-OFDM(multiple input multiple output - orthogonal frequen-cy division multiplexing)systems based on MMSE(minimum mean square error)criteria is proposed,which translated the prob-lem of channel estimation into the finding out the solution of TBT(Toeplitz-block-Toeplitz) nonlinear equations. And then com-plex operation of matrix inverse and matrix multiplication can be avoided with fast solution method,which greatly reduced the computation complexity of channel estimation. Simulation results show that,compared with traditional MMSE channel estimation method,the proposed simplified method can reduce computation complexity efficiently with small performance degradation.
