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Statistical rate allocation for layered space-time structure

Du, Jianxuan; Li, Ye (Geoffrey); Gu, Daqing; Molisch, Andreas LU and Zhang, Jinyun (2007) In IEEE Transactions on Communications 55(3). p.489-496
Abstract
We propose a modified layered structure for multiple-input multiple-output systems, where the layer detection order is fixed and the data rate for each layer is allocated based on the detection order and channel statistics. Using a Gaussian approximation of the layer capacities, we derive an asymptotic optimum data-rate-allocation approach. For optimum data-rate allocation, the amount of backoff from the mean layer capacity is proportional to the standard deviation of the layer capacity. With statistical data-rate allocation, only limited channel feedback is needed to update channel statistics at the transmitter. Simulation results show significant performance improvement with the proposed algorithm. We also find that the performance gap... (More)
We propose a modified layered structure for multiple-input multiple-output systems, where the layer detection order is fixed and the data rate for each layer is allocated based on the detection order and channel statistics. Using a Gaussian approximation of the layer capacities, we derive an asymptotic optimum data-rate-allocation approach. For optimum data-rate allocation, the amount of backoff from the mean layer capacity is proportional to the standard deviation of the layer capacity. With statistical data-rate allocation, only limited channel feedback is needed to update channel statistics at the transmitter. Simulation results show significant performance improvement with the proposed algorithm. We also find that the performance gap between the layered structure and the channel capacity diminishes with increasing ergodicity within each codeword. Numerical results show a singal-to-noise ratio improvement of 6.3 and 3.6 dB for TGn channels "B" and "D," respectively, for 1 % outage probability and 9 b/s/Hz spectral efficiency. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
rate allocation, vertical, multiple-input multiple-output orthogonal, frequency-division multiplexing (MIMO-OFDM), layered space-time coding, Bell Labs layered space-time (V-BLAST)
in
IEEE Transactions on Communications
volume
55
issue
3
pages
489 - 496
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000245149000014
  • scopus:34147182663
ISSN
0090-6778
DOI
10.1109/TCOMM.2006.888891
language
English
LU publication?
yes
id
4e6da394-f73e-404f-b47c-b0db659b411e (old id 670451)
date added to LUP
2007-12-07 13:10:01
date last changed
2017-01-01 06:46:00
@article{4e6da394-f73e-404f-b47c-b0db659b411e,
  abstract     = {We propose a modified layered structure for multiple-input multiple-output systems, where the layer detection order is fixed and the data rate for each layer is allocated based on the detection order and channel statistics. Using a Gaussian approximation of the layer capacities, we derive an asymptotic optimum data-rate-allocation approach. For optimum data-rate allocation, the amount of backoff from the mean layer capacity is proportional to the standard deviation of the layer capacity. With statistical data-rate allocation, only limited channel feedback is needed to update channel statistics at the transmitter. Simulation results show significant performance improvement with the proposed algorithm. We also find that the performance gap between the layered structure and the channel capacity diminishes with increasing ergodicity within each codeword. Numerical results show a singal-to-noise ratio improvement of 6.3 and 3.6 dB for TGn channels "B" and "D," respectively, for 1 % outage probability and 9 b/s/Hz spectral efficiency.},
  author       = {Du, Jianxuan and Li, Ye (Geoffrey) and Gu, Daqing and Molisch, Andreas and Zhang, Jinyun},
  issn         = {0090-6778},
  keyword      = {rate allocation,vertical,multiple-input multiple-output orthogonal,frequency-division multiplexing (MIMO-OFDM),layered space-time coding,Bell Labs layered space-time (V-BLAST)},
  language     = {eng},
  number       = {3},
  pages        = {489--496},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Communications},
  title        = {Statistical rate allocation for layered space-time structure},
  url          = {http://dx.doi.org/10.1109/TCOMM.2006.888891},
  volume       = {55},
  year         = {2007},
}