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Approximate Message Passing for Multi-Carrier Transmission over Doubly Selective Channels

Meng, Dong
http://rave.ohiolink.edu/etdc/view?acc_num=osu1339602506

Abstract Details

2012, Master of Science, Ohio State University, Electrical and Computer Engineering.
We propose a factor-graph-based approach to joint channel-estimation-and-decoding (JCED) of bit-interleaved coded orthogonal frequency division multiplexing (BICMOFDM) over a Rayleigh Fading channel. A Basis Expansion model is applied to reduce inter-carrier interference (ICI) caused by channel variation over time. Guard interval structure is introduce to reduce inter-symbol interference (ISI) caused by multi-path delay. In contrast to existing designs, our is capable of exploiting not only sparsity in sampled channel taps but also time variation in both the tap amplitudes and the tap support. In order to exploit these channel-tap structures, we adopt a twostate Gaussian mixture prior in conjunction with a Gauss-Markov model on the tap amplitude trajectories and a discrete Binary Markov model on the tap state trajectories. For loopy belief propagation, we exploit the Generalized Approximate Message Passing algorithm (GAMP) recently developed in the context of compressive sensing, and show that it can be successfully coupled with soft-input soft-output decoding, as well as Markov trajectory inference, through a sum-product framework. We try to find out the optimal scheme to utilize the most of channel capacity as well as getting effective bit error rate (BER).
Philip Schniter, Dr. (Advisor)
Lee Potter, Dr. (Committee Member)
51 p.
Electrical Engineering
doubly selective channel; ICI; ISI; compressive sensing; OFDM; GAMP; EM

Recommended Citations

Citations

  • Meng, D. (2012). Approximate Message Passing for Multi-Carrier Transmission over Doubly Selective Channels [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339602506

    APA Style (7th edition)

  • Meng, Dong. Approximate Message Passing for Multi-Carrier Transmission over Doubly Selective Channels. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1339602506.

    MLA Style (8th edition)

  • Meng, Dong. "Approximate Message Passing for Multi-Carrier Transmission over Doubly Selective Channels." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339602506

    Chicago Manual of Style (17th edition)

osu1339602506
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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.