Spatial Diversity and Channel Statistics-Based RF-Baseband Co-design for Antenna Selection
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/600644
- author
- Sudarshan, P ; Mehta, N B ; Molisch, Andreas LU and Zhang, J
- organization
- publishing date
- 2004
- 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}}, }