Iterative MMSE-DFE and Error Transfer for OFDM in Doubly Selective Channels

被引：4
|
作者：
Huang, Su [1 ]
Wang, Jun [1 ]
An, Zhecheng [1 ]
Wang, Jintao [1 ]
Song, Jian [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Res Inst, Shenzhen City Key Lab Digital TV Syst, Shenzhen 518057, Peoples R China
来源：
IEEE TRANSACTIONS ON BROADCASTING | 2015年 / 61卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Minimum mean square error (MMSE); decision feedback; intercarrier interference (ICI) mitigation; error power transfer; LOW-COMPLEXITY EQUALIZATION; SYSTEMS;
D O I：
10.1109/TBC.2015.2432465
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An iterative design of minimum mean square error decision feedback equalizer (MMSE-DFE) to suppress the intercarrier interference (ICI) of orthogonal frequency division multiplexing systems in the time-variant channels is analyzed in this paper. The channel is assumed to vary in a linear fashion within a frame. The error power transfer is investigated in parallel with the equalizing process, showing the gain in iterations and aiding the MMSE decision. Iteratively, the ICI components are estimated and canceled from the receive symbol, providing an MMSE estimate of the source symbol with an increasing reliability. It is shown that based on the error power transfer analyzed in this paper, ICI components can be significantly removed via the iterative MMSE-DFE, leaving the error composed of noise and negligible residue of ICI. Simulations have verified the accuracy of the error power estimation.
引用
收藏
页码：541 / 547
页数：7
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