DMCA
Achieving near-capacity on a multiple-antenna channel (2003)
| Venue: | IEEE Trans. Commun |
| Citations: | 401 - 2 self |
BibTeX
@ARTICLE{Hochwald03achievingnear-capacity,
author = {Bertrand M. Hochwald and Stephan Ten Brink},
title = {Achieving near-capacity on a multiple-antenna channel},
journal = {IEEE Trans. Commun},
year = {2003},
pages = {389--399}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
Recent advancements in iterative processing of channel codes and the development of turbo codes have allowed the communications industry to achieve near-capacity on a single-antenna Gaussian or fading channel with low complexity. We show how these iterative techniques can also be used to achieve near-capacity on a multiple-antenna system where the receiver knows the channel. Combining iterative processing with multiple-antenna channels is particularly challenging because the channel capacities can be a factor of ten or more higher than their single-antenna counterparts. Using a “list ” version of the sphere decoder, we provide a simple method to iteratively detect and decode any linear space-time mapping combined with any channel code that can be decoded using so-called “soft ” inputs and outputs. We exemplify our technique by directly transmitting symbols that are coded with a channel code; we show that iterative processing with even this simple scheme can achieve near-capacity. We consider both simple convolutional and powerful turbo channel codes and show that excellent performance at very high data rates can be attained with either. We compare our simulation results with Shannon capacity limits for ergodic multiple-antenna channel. Index Terms—Wireless communications, BLAST, turbo codes, transmit diversity, receive diversity, fading channels, sphere decoding, soft-in/soft-out, concatenated codes 1
Keyphrases
multiple-antenna channel iterative processing channel code turbo code so-called soft input high data rate sphere decoder channel capacity recent advancement simple method iterative technique single-antenna counterpart single-antenna gaussian linear space-time mapping index term wireless communication fading channel ergodic multiple-antenna channel communication industry shannon capacity limit low complexity multiple-antenna system list version simulation result receive diversity simple scheme soft-in soft-out transmit diversity powerful turbo channel code simple convolutional excellent performance
