Paper Info
Title
Iterative Multiuser Detection With Soft Decision-Directed Channel Estimation For Mc-Idma And Performance Comparison With Chip-Interleaved Mc-Cdma
Abstract
This paper applies iterative multiuser detection employing a new channel estimation scheme to multicarrier interleave-division multiple access (MC-IDMA), called OFDM-IDMA, which is expected to offer improved spectral efficiency in mobile communications. The MC-IDMA transmitter uses both a low-rate channel code and an individual chip interleaver for each user. The MC-IDMA receiver. which this paper focuses upon, repeats the iterative multiuser detection and soft decision-directed channel estimation (SDCE) by exploiting log-likelihood ratios (LLRs) of the coded bits which the maximum a posteriori (MAP)-based channel decoders for all users provide. SDCE estimates channel impulse responses of all users by the least-mean-square (LMS) algorithm. which aims to minimize the mean squared error between the received signal and its replica. This paper investigates the performance of MC-IDMA employing SDCE and compares it with those of three MC-CDMA techniques. Computer simulations demonstrate that MC-IDMA employing SDCE outperforms time-spread MC-CDMA and frequency-spread MC-CDMA, and that it can achieve almost the same bit error rate performance as chip-interleaved MC-CDMA while requiring lower complexity.
Year
DOI
Venue
2009
10.1587/transcom.E92.B.1495
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
mobile communication, MIMO-OFDM, IDMA, MC-IDMA, channel estimation, MC-CDMA
MIMO-OFDM,Computer science,Multiuser detection,Communication channel,Algorithm,Speech recognition,Spectral efficiency,Decoding methods,Code division multiple access,Orthogonal frequency-division multiplexing,Bit error rate,Distributed computing
Journal
Volume
Issue
ISSN
E92B
5
0916-8516
Citations 
PageRank 
References 
13
0.81
9
Authors
4
Name
Order
Citations
PageRank
Satoshi Suyama119231.05
Hiroshi Suzuki216226.01
Kazuhiko Fukawa321239.25
Li Zhang4130.81