Name
Title | ||
|---|---|---|
Iterative MAP Channel Estimation Based on Factor Graph for OFDM Mobile Communications |
Abstract | ||
|---|---|---|
To maintain good transmission performance of orthogonal frequency-division multiplexing (OFDM) mobile communications over fast-fading channels, iterative maximum a posteriori (MAP) receivers that iterate channel estimation and signal detection on the basis of the expectation-maximization (EM) algorithm have been investigated. In order to make such a MAP receiver more robust against time-variant channels, this paper derives channel estimation with subcarrier removal from the perspective of a message-passing algorithm on factor graphs. The subcarrier removal estimates the channel frequency response by using the detected signals of all subcarriers other than that of a targeted subcarrier. This modification can avoid the repetitive use of incorrectly detected signals for the channel estimation. Computer simulations under fast-fading conditions demonstrate that the EM-based MAP receiver performing the subcarrier removal can improve the packet error rate (PER) drastically. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/VETECS.2012.6239957 | Vehicular Technology Conference |
Keywords | Field | DocType |
OFDM modulation,channel estimation,expectation-maximisation algorithm,fading channels,frequency response,graphs,iterative methods,message passing,mobile radio,radio receivers,signal detection,time-varying channels,EM algorithm,EM-based MAP receiver,OFDM mobile communications,PER,channel frequency response,computer simulations,expectation-maximization algorithm,factor graph,fast-fading channels,fast-fading conditions,iterate channel estimation,iterative MAP channel estimation,iterative maximum a posteriori receivers,message-passing algorithm,orthogonal frequency-division multiplexing mobile communications,packet error rate,signal detection,subcarrier removal estimation,time-variant channels,transmission performance | Subcarrier,Factor graph,Iterative method,Computer science,Communication channel,Electronic engineering,Maximum a posteriori estimation,Multiplexing,Orthogonal frequency-division multiplexing,Bit error rate | Conference |
ISSN | ISBN | Citations |
1550-2252 E-ISBN : 978-1-4673-0988-2 | 978-1-4673-0988-2 | 0 |
PageRank | References | Authors |
0.34 | 4 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kazushi Muraoka | 1 | 0 | 0.34 |
| Kazuhiko Fukawa | 2 | 212 | 39.25 |
| Hiromichi Suzuki | 3 | 5 | 2.23 |
| Satoshi Suyama | 4 | 3 | 0.79 |