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Spatial Diversity and Channel Statistics-Based RF-Baseband Co-design for Antenna Selection

Sudarshan, P; Mehta, N B; Molisch, Andreas LU and Zhang, J (2004) IEEE 60th Vehicular Technology Conference, VTC2004-Fall. In IEEE 60th Vehicular Technology Conference, VTC2004-Fall. 3. p.1658-1662
Abstract
For MIMO systems, we introduce two novel architectures that significantly reduce the required number of expensive RF chains and still perform as well as a conventional full complexity solution for many cases of interest. We combine RF pre-processing - based solely on channel statistics and not instantaneous channel state - with selection and corresponding baseband signal processing. For a system with L RF chains, N/sub t/ transmit and N/sub r/ receive antennas, the first architecture uses an L/spl times/N/sub r/ RF pre-processing matrix that outputs only L streams followed by baseband signal processing. The second one uses an N/sub r//spl times/N/sub r/ RF pre-processing matrix followed by selection of L streams and baseband signal... (More)
For MIMO systems, we introduce two novel architectures that significantly reduce the required number of expensive RF chains and still perform as well as a conventional full complexity solution for many cases of interest. We combine RF pre-processing - based solely on channel statistics and not instantaneous channel state - with selection and corresponding baseband signal processing. For a system with L RF chains, N/sub t/ transmit and N/sub r/ receive antennas, the first architecture uses an L/spl times/N/sub r/ RF pre-processing matrix that outputs only L streams followed by baseband signal processing. The second one uses an N/sub r//spl times/N/sub r/ RF pre-processing matrix followed by selection of L streams and baseband signal processing. We derive the optimal RF pre-processing matrices and the corresponding baseband combining vectors that maximize the average output SNR. A beamforming-based geometric intuition is also developed. With the constraints of today's IC fabrication technology in mind, an approximation that requires only variable phase-shifters and adders, is also proposed and shown to incur a negligible loss in performance. In the process, a fair benchmark for comparing with the previously proposed FFT Butler pre-processing is provided. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
signal processing, diversity reception, beam steering, MIMO systems
in
IEEE 60th Vehicular Technology Conference, VTC2004-Fall.
volume
3
pages
1658 - 1662
conference name
IEEE 60th Vehicular Technology Conference, VTC2004-Fall.
external identifiers
  • Scopus:17144383566
ISSN
1090-3038
ISBN
0-7803-8521-7
DOI
10.1109/VETECF.2004.1400316
language
English
LU publication?
yes
id
956f9cc5-94e7-4539-b203-e24d5e9e49ad (old id 600644)
date added to LUP
2007-12-06 10:49:07
date last changed
2016-10-13 04:30:26
@misc{956f9cc5-94e7-4539-b203-e24d5e9e49ad,
  abstract     = {For MIMO systems, we introduce two novel architectures that significantly reduce the required number of expensive RF chains and still perform as well as a conventional full complexity solution for many cases of interest. We combine RF pre-processing - based solely on channel statistics and not instantaneous channel state - with selection and corresponding baseband signal processing. For a system with L RF chains, N/sub t/ transmit and N/sub r/ receive antennas, the first architecture uses an L/spl times/N/sub r/ RF pre-processing matrix that outputs only L streams followed by baseband signal processing. The second one uses an N/sub r//spl times/N/sub r/ RF pre-processing matrix followed by selection of L streams and baseband signal processing. We derive the optimal RF pre-processing matrices and the corresponding baseband combining vectors that maximize the average output SNR. A beamforming-based geometric intuition is also developed. With the constraints of today's IC fabrication technology in mind, an approximation that requires only variable phase-shifters and adders, is also proposed and shown to incur a negligible loss in performance. In the process, a fair benchmark for comparing with the previously proposed FFT Butler pre-processing is provided.},
  author       = {Sudarshan, P and Mehta, N B and Molisch, Andreas and Zhang, J},
  isbn         = {0-7803-8521-7},
  issn         = {1090-3038},
  keyword      = {signal processing,diversity reception,beam steering,MIMO systems},
  language     = {eng},
  pages        = {1658--1662},
  series       = {IEEE 60th Vehicular Technology Conference, VTC2004-Fall.},
  title        = {Spatial Diversity and Channel Statistics-Based RF-Baseband Co-design for Antenna Selection},
  url          = {http://dx.doi.org/10.1109/VETECF.2004.1400316},
  volume       = {3},
  year         = {2004},
}