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Performance Analysis of a Pre-BLAST-DFE Technique for MISO Channels With Decentralized Receivers

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4 Author(s)
Amihood, P. ; Dept. of Electr. & Comput. Eng., Univ. of California at San Diego, La Jolla, CA ; Masry, E. ; Milstein, L.B. ; Proakis, J.G.

The performance of a pre-Bell Laboratories Layered Space-Time Architecture (BLAST)-decision feedback equalization (DFE) technique with Tomlinson-Harashima precoding and decentralized receivers, operating over multiple-input single-output (MISO) frequency-selective fading channels, is evaluated. First, we derive the probability of symbol error for Tomlinson-Harashima precoding operating over single-input single-output channels with intersymbol interference. We then generalize this result to MISO frequency-selective fading channels with decentralized receivers by using the QR decomposition technique. The effect of optimal ordering of the decentralized receivers, which minimizes the total transmit energy, is investigated. We obtain a closed-form expression for the probability density function of the squared diagonal elements of the upper right triangular matrix belonging to the optimal QR decomposition when two transmit antennas and two receivers are used. We also provide simulations to corroborate the analytical results.

Published in:

Communications, IEEE Transactions on  (Volume:55 ,  Issue: 7 )

Date of Publication:

July 2007

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