Journal article
Vector channel modeling and prediction for improvement of downlink received power
IEEE transactions on communications, Vol.50(5), p866
01 May 2002
Abstract
Fast fading is still one of the most serious problems in mobile communications. Channel prediction is a very effective approach to solve this problem. Recently, many researchers have done significant work in this area [1]-[9]. However, most of the research has been concentrated on single channel prediction instead of vector channel prediction required for smart antenna systems. In this paper we introduce a novel synthesis and prediction filter at the base station to predict the vector channel in time-division duplex systems. We show the advantage of modeling each component of the vector channel with the same coefficients over modeling each channel separately. Experimental results from measurements taken in downtown Austin show that prediction of the vector channel is feasible, even as far as 10 steps ahead. Ray tracing simulations [10], [11] of downtown Austin show that these predictions enhance downlink beamforming resulting in improvements in downlink received power in excess of 10 dB in nonline-of-site scenarios compared to beamforming without predictions. Furthermore, this improvement allows an increase in the duplex interval by more than three times, assuming constant mobile velocity.
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Details
- Title
- Vector channel modeling and prediction for improvement of downlink received power
- Creators
- Alberto ArredondoKapil R DandekarGuanghan Xu
- Publication Details
- IEEE transactions on communications, Vol.50(5), p866
- Publisher
- Institute of Electrical and Electronics Engineers, Inc
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Identifiers
- 991019186630804721