We consider the problem of transmitting a continuous source through an OFDM system. Multiple description scalar quantization (MDSQ) is applied to the source signal, resulting in two correlated source descriptions. The two descriptions are then OFDM modulated and transmitted through two parallel frequency-selective fading channels. At the receiver, a blind turbo receiver is developed for joint OFDM demodulation and MDSQ decoding. Transformation of the extrinsic information of the two descriptions are exchanged between each other to improve system performance. A blind soft-input soft-output OFDM detector is developed, which is based on the techniques of importance sampling and resampling. Such a detector is capable of exchanging the so-called extrinsic information with the other component in the above turbo receiver, and successively improving the overall receiver performance. Finally, we also treat channel-coded systems, and a novel blind turbo receiver is developed for joint demodulation, channel decoding, and MDSQ source decoding.
This article is part of the series Advanced Signal Processing Algorithms for Wireless Communications.
Research Article
Blind Decoding of Multiple Description Codes over OFDM Systems via Sequential Monte Carlo
1 Texas Instruments Inc, 12500 TI Boulevard Dallas, MS 8653, Dallas, TX 75243, USA
2 Department of Electrical Engineering, Columbia University, New York, NY 10027, USA
EURASIP Journal on Wireless Communications and Networking 2005, 2005:782804 doi:10.1155/WCN.2005.141
The electronic version of this article is the complete one and can be found online at: http://jwcn.eurasipjournals.com/content/2005/2/782804
| Received: | 1 May 2004 |
| Revisions received: | 20 December 2004 |
| Published: | 28 April 2005 |
© 2005 Yang et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
