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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. 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)
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author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
signal processing, diversity reception, beam steering, MIMO systems
host publication
IEEE 60th Vehicular Technology Conference, VTC2004-Fall.
volume
3
pages
1658 - 1662
conference name
IEEE 60th Vehicular Technology Conference, VTC2004-Fall.
conference dates
2004-09-26 - 2004-09-29
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
2016-04-04 09:26:00
date last changed
2022-01-29 17:49:20
@inproceedings{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}},
  booktitle    = {{IEEE 60th Vehicular Technology Conference, VTC2004-Fall.}},
  isbn         = {{0-7803-8521-7}},
  issn         = {{1090-3038}},
  keywords     = {{signal processing; diversity reception; beam steering; MIMO systems}},
  language     = {{eng}},
  pages        = {{1658--1662}},
  title        = {{Spatial Diversity and Channel Statistics-Based RF-Baseband Co-design for Antenna Selection}},
  url          = {{http://dx.doi.org/10.1109/VETECF.2004.1400316}},
  doi          = {{10.1109/VETECF.2004.1400316}},
  volume       = {{3}},
  year         = {{2004}},
}