Abstract
In this paper, an iterative receiver for a joint data-detection and channel-estimation scheme is presented for orthogonal frequency-division multiplexing systems, which incorporates iterative decoding in the receiver. In the proposed scheme, a maximum a posteriori-based decoder and a channel estimator provide more reliable information on the coded bits for each other in an iterative manner. We first consider a practical implementation issue for the optimal minimum mean squared error two-dimensional (2-D) channel estimator as an essential element in the iterative receiver. To reduce the complexity of the 2-D estimator as suited to the iterative receiver, we focus on rigorously investigating how a separable estimator must be designed so that its structure may become asymptotically equivalent to that of the optimal 2-D estimator. Furthermore, we derive an analytical expression of the iterative process to evaluate a convergence performance as a function of the number of iterations and discuss its convergence property. Our simulation results demonstrate that the proposed iterative receiver achieves a near-ideal performance with only a few iterations under time-variant multipath fading channels.
| Original language | English |
|---|---|
| Pages (from-to) | 450-460 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 53 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2004 Mar 1 |
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Keywords
- Channel estimation
- Orthogonal frequency-division multiplexing (OFDM)
- Rayleigh-fading channels
- Turbo processing
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
Iterative receiver for joint detection and channel estimation in OFDM systems under mobile radio channels. / Park, Seung Young; Kim, Yeun G.; Kang, Chung Gu.
In: IEEE Transactions on Vehicular Technology, Vol. 53, No. 2, 01.03.2004, p. 450-460.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Iterative receiver for joint detection and channel estimation in OFDM systems under mobile radio channels
AU - Park, Seung Young
AU - Kim, Yeun G.
AU - Kang, Chung Gu
PY - 2004/3/1
Y1 - 2004/3/1
N2 - In this paper, an iterative receiver for a joint data-detection and channel-estimation scheme is presented for orthogonal frequency-division multiplexing systems, which incorporates iterative decoding in the receiver. In the proposed scheme, a maximum a posteriori-based decoder and a channel estimator provide more reliable information on the coded bits for each other in an iterative manner. We first consider a practical implementation issue for the optimal minimum mean squared error two-dimensional (2-D) channel estimator as an essential element in the iterative receiver. To reduce the complexity of the 2-D estimator as suited to the iterative receiver, we focus on rigorously investigating how a separable estimator must be designed so that its structure may become asymptotically equivalent to that of the optimal 2-D estimator. Furthermore, we derive an analytical expression of the iterative process to evaluate a convergence performance as a function of the number of iterations and discuss its convergence property. Our simulation results demonstrate that the proposed iterative receiver achieves a near-ideal performance with only a few iterations under time-variant multipath fading channels.
AB - In this paper, an iterative receiver for a joint data-detection and channel-estimation scheme is presented for orthogonal frequency-division multiplexing systems, which incorporates iterative decoding in the receiver. In the proposed scheme, a maximum a posteriori-based decoder and a channel estimator provide more reliable information on the coded bits for each other in an iterative manner. We first consider a practical implementation issue for the optimal minimum mean squared error two-dimensional (2-D) channel estimator as an essential element in the iterative receiver. To reduce the complexity of the 2-D estimator as suited to the iterative receiver, we focus on rigorously investigating how a separable estimator must be designed so that its structure may become asymptotically equivalent to that of the optimal 2-D estimator. Furthermore, we derive an analytical expression of the iterative process to evaluate a convergence performance as a function of the number of iterations and discuss its convergence property. Our simulation results demonstrate that the proposed iterative receiver achieves a near-ideal performance with only a few iterations under time-variant multipath fading channels.
KW - Channel estimation
KW - Orthogonal frequency-division multiplexing (OFDM)
KW - Rayleigh-fading channels
KW - Turbo processing
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UR - http://www.scopus.com/inward/citedby.url?scp=1942485943&partnerID=8YFLogxK
U2 - 10.1109/TVT.2004.823536
DO - 10.1109/TVT.2004.823536
M3 - Article
AN - SCOPUS:1942485943
VL - 53
SP - 450
EP - 460
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
SN - 0018-9545
IS - 2
ER -