Paper Info
Title
An iterative receiver for coded OFDM systems over time-varying wireless channels.
Abstract
This paper presents a low-complexity iterative receiver for coded OFDM systems. We present an EM-based iterative algorithm for combined channel estimation and decoding that makes collective use of the available data and system constraints. Minimum number of pilots are sent only in the first symbol of the packet to acquire the channel; then the iterative algorithm is used to track the channel time variation, which is assumed to follow a state-space model, using an EM-based Kalman filter. Data recovery can be achieved within a single OFDM symbol. We also propose the use of an optional outer LDPC code in serial concatenation to offer a trade-off between latency and performance, especially for multi-amplitude modulations, without affecting the complexity of the core iterative algorithm.
Year
DOI
Venue
2003
10.1109/ICC.2003.1204080
ICC
Keywords
Field
DocType
OFDM modulation,channel estimation,data integrity,iterative methods,parity check codes,radio receivers,time-varying channels,EM-based iterative algorithm,Kalman filter,channel estimation,channel time variation,coded OFDM systems,data recovery,iterative receiver,low density parity check code,multiamplitude modulations,time-varying wireless channels
Computer science,Low-density parity-check code,Iterative method,Network packet,Communication channel,Real-time computing,Kalman filter,Concatenation,Decoding methods,Orthogonal frequency-division multiplexing
Conference
Volume
Citations 
PageRank 
5
9
0.62
References 
Authors
4
4
Name
Order
Citations
PageRank
Ghazi Al-Rawi1141.81
Tareq Y. Al-Naffouri2969108.71
Ahmad Bahai360265.90
John M. Cioffi44076772.00