Channel State Feedback over the MIMO-MAC
Information Theory
2010-05-11 v1 math.IT
Abstract
We consider the problem of designing low latency and low complexity schemes for channel state feedback over the MIMO-MAC (multiple-input multiple-output multiple access channel). We develop a framework for analyzing this problem in terms of minimizing the MSE distortion, and come up with separated source-channel schemes and joint source-channel schemes that perform better than analog feedback. We also develop a strikingly simple code design based on scalar quantization and uncoded QAM modulation that achieves the theoretical asymptotic performance limit of the separated approach with very low complexity and latency, in the case of single-antenna users.
Cite
@article{arxiv.1005.1594,
title = {Channel State Feedback over the MIMO-MAC},
author = {K. Raj Kumar and Giuseppe Caire},
journal= {arXiv preprint arXiv:1005.1594},
year = {2010}
}
Comments
Submitted to the IEEE Transactions on Information Theory, April 2010