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Bit-Interleaved Coded Multiple Beamforming with Imperfect CSIT

Summary: 1
Bit-Interleaved Coded Multiple Beamforming
with Imperfect CSIT
Ersin Sengul Member, IEEE, Hong Ju Park,
and Ender Ayanoglu Fellow, IEEE
Center for Pervasive Communications and Computing
Department of Electrical Engineering and Computer Science
University of California, Irvine
Irvine, California 92697-2625
Email: esengul@uci.edu, hjpark@uci.edu, ayanoglu@uci.edu
This paper addresses the performance of bit-interleaved coded multiple beamforming (BICMB) [1], [2] with
imperfect knowledge of beamforming vectors. Most studies for limited-rate channel state information at the
transmitter (CSIT) assume that the precoding matrix has an invariance property under an arbitrary unitary transform.
In BICMB, this property does not hold. On the other hand, the optimum precoder and detector for BICMB are
invariant under a diagonal unitary transform. In order to design a limited-rate CSIT system for BICMB, we propose
a new distortion measure optimum under this invariance. Based on this new distortion measure, we introduce a new
set of centroids and employ the generalized Lloyd algorithm for codebook design. We provide simulation results
demonstrating the performance improvement achieved with the proposed distortion measure and the codebook
design for various receivers with linear detectors. We show that although these receivers have the same performance


Source: Ayanoglu, Ender - Department of Electrical and Computer Engineering, University of California, Irvine


Collections: Engineering