Combined Serially Concatenated Codes and MMSE Equalization: an EXIT Chart Aided Perspective

Wang, J., Ng, S.X., Yang, L-L. and Hanzo, L. (2006) Combined Serially Concatenated Codes and MMSE Equalization: an EXIT Chart Aided Perspective. In, IEEE VTC'06 (Fall), Montreal, Canada, 25 - 28 Sep 2006. , 5 pages.


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Iterative Minimum Mean Square Error (MMSE) equalization and channel decoding is appealing, since it exhibits a lower complexity than maximum a posteriori (MAP) turbo equalization. However, the MMSE equalizer’s attainable performance is upper-bounded by that recorded for transmission over the coded AWGN channel, a phenomenon usually referred to as ”error shoulder”. In order to circumvent this performance limitation, we propose a three-stage concatenated transceiver constituted by inner and outer coding as well as MMSE equalization, which achieves significant iteration gains, despite using low-complexity serially concatenated memory-1 convolutional codes. It is demonstrated that this three-stage scheme outperforms the traditional two-stage MMSE turbo equalization scheme above a certain Eb/N0 threshold. Furthermore, the convergence behavior of the proposed scheme is analyzed with the aid of 3D EXtrinsic Information Transfer (EXIT) charts and their 2D projections, leading to a number of practical iterative receiver design guidelines.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 25-28 September 2006
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 263041
Date Deposited: 03 Oct 2006
Last Modified: 27 Mar 2014 20:06
Further Information:Google Scholar
ISI Citation Count:0

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