Weng, Ching-Chih and Chen, Chun-Yang and Vaidyanathan, P. P. (2009) Joint optimization of transceivers with decision feedback and bit loading. In: Conference record of the 42nd Asilomar Conference on Signals, Systems and Computers. Conference Record of the Asilomar Conference on Signals, Systems and Computers . IEEE , Piscataway, NJ, pp. 1310-1314. ISBN 978-1-4244-2940-0 http://resolver.caltech.edu/CaltechAUTHORS:20100722-150551427
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The transceiver optimization problem for MIMO channels has been considered in the past with linear receivers as well as with decision feedback (DFE) receivers. Joint optimization of bit allocation, precoder, and equalizer has in the past been considered only for the linear transceiver (transceiver with linear precoder and linear equalizer). It has also been observed that the use of DFE even without bit allocation in general results in better performance that linear transceivers with bit allocation. This paper provides a general study of this for transceivers with the zero-forcing constraint. It is formally shown that when the bit allocation, precoder, and equalizer are jointly optimized, linear transceivers and transceivers with DFE have identical performance in the sense that transmitted power is identical for a given bit rate and error probability. The developments of this paper are based on the generalized triangular decomposition (GTD) recently introduced by Jiang, Li, and Hager. It will be shown that a broad class of GTD-based systems solve the optimal DFE problem with bit allocation. The special case of a linear transceiver with optimum bit allocation will emerge as one of the many solutions.
|Item Type:||Book Section|
|Additional Information:||© 2008 IEEE. This work is supported in parts by the ONR grant N00014-06-1-0011, and the TMS scholarship 94-2-A-018 of the National Science Council of Republic of China, Taiwan.|
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|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||30 Jul 2010 17:10|
|Last Modified:||26 Dec 2012 12:15|
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