DMCA
Effective SNR for Space-Time Modulation over a TimeVarying Rician Channel (2004)
| Venue: | IEEE Transactions on Communications |
| Citations: | 9 - 3 self |
BibTeX
@ARTICLE{Peel04effectivesnr,
author = {Christian B. Peel and A. Lee Swindlehurst and Senior Member},
title = {Effective SNR for Space-Time Modulation over a TimeVarying Rician Channel},
journal = {IEEE Transactions on Communications},
year = {2004},
pages = {17--23}
}
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Abstract
Abstract—Rapid temporal variations in wireless channels pose a significant challenge for space–time modulation and coding algorithms. This letter examines the performance degradation that results when time-varying flat fading is encountered when using trained and unitary space–time modulation. Performance is characterized for a channel having a constant specular component plus a time-varying diffuse component. A first-order autoregres-sive (AR) model is used to characterize diffuse channel coefficients that vary from symbol to symbol, and is shown to lead to an effective signal-to-noise ratio (SNR) that decreases with time. Differential modulation is shown to have an advantage in effective SNR over trained unitary modulation at high power. Simulation results are provided to support our analysis. Index Terms—Differential modulation, fading channels, mul-tiple antennas, space–time modulation, time-varying channels, trained modulation, wireless communications. I.
Keyphrases
effective snr timevarying rician channel space-time modulation space time modulation mul-tiple antenna abstract rapid temporal variation effective signal-to-noise ratio time-varying channel differential modulation significant challenge high power diffuse channel coefficient index term differential modulation unitary space time modulation time-varying flat fading time-varying diffuse component wireless communication performance degradation trained modulation wireless channel simulation result trained unitary modulation constant specular component
