Asymmetric Cooperation among Wireless Relays with Linear Precoding
(2008) In IEEE Transactions on Wireless Communications 7(12). p.5420-5430- Abstract
- Wireless relays extend coverage, improve spectral efficiency, and enhance reliability and rates of wireless cellular communication systems. In this work, we introduce the fundamental notion of asymmetric cooperation among cooperating relays in cellular downlinks - different relays are party to different but overlapping knowledge about the messages transmitted from the base station. We argue that asymmetric cooperation arises naturally in most two-phase protocols In which the base station first transmits information to multiple relays that then cooperatively forward the information to the recipient mobile stations in the cell. For a system in which two relays are of the decode-and-forward type and cooperate using linear precoding to... (More)
- Wireless relays extend coverage, improve spectral efficiency, and enhance reliability and rates of wireless cellular communication systems. In this work, we introduce the fundamental notion of asymmetric cooperation among cooperating relays in cellular downlinks - different relays are party to different but overlapping knowledge about the messages transmitted from the base station. We argue that asymmetric cooperation arises naturally in most two-phase protocols In which the base station first transmits information to multiple relays that then cooperatively forward the information to the recipient mobile stations in the cell. For a system in which two relays are of the decode-and-forward type and cooperate using linear precoding to communicate with two mobile stations, we formulate the general, but complicated, throughput optimization problem and derive several results that considerably simplify the optimization. We show that under different channel configurations and fairness criteria, asymmetric cooperation is often the throughput-maximizing option. Under typical configurations, a 20-30% throughput enhancement is achieved compared to conventional full-cooperation systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1377069
- author
- Devroye, Natasha ; Mehta, Neelesh and Molisch, Andreas LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- MIMO, SDMA, asymmetry, linear precoding, cooperation, Relays, fading channels
- in
- IEEE Transactions on Wireless Communications
- volume
- 7
- issue
- 12
- pages
- 5420 - 5430
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000261924100037
- scopus:58149125157
- ISSN
- 1536-1276
- DOI
- 10.1109/T-WC.2008.071305
- language
- English
- LU publication?
- yes
- id
- 9e940478-7a2e-475f-9a4e-283a3ce76b7f (old id 1377069)
- date added to LUP
- 2016-04-01 13:31:58
- date last changed
- 2022-01-27 19:41:58
@article{9e940478-7a2e-475f-9a4e-283a3ce76b7f, abstract = {{Wireless relays extend coverage, improve spectral efficiency, and enhance reliability and rates of wireless cellular communication systems. In this work, we introduce the fundamental notion of asymmetric cooperation among cooperating relays in cellular downlinks - different relays are party to different but overlapping knowledge about the messages transmitted from the base station. We argue that asymmetric cooperation arises naturally in most two-phase protocols In which the base station first transmits information to multiple relays that then cooperatively forward the information to the recipient mobile stations in the cell. For a system in which two relays are of the decode-and-forward type and cooperate using linear precoding to communicate with two mobile stations, we formulate the general, but complicated, throughput optimization problem and derive several results that considerably simplify the optimization. We show that under different channel configurations and fairness criteria, asymmetric cooperation is often the throughput-maximizing option. Under typical configurations, a 20-30% throughput enhancement is achieved compared to conventional full-cooperation systems.}}, author = {{Devroye, Natasha and Mehta, Neelesh and Molisch, Andreas}}, issn = {{1536-1276}}, keywords = {{MIMO; SDMA; asymmetry; linear precoding; cooperation; Relays; fading channels}}, language = {{eng}}, number = {{12}}, pages = {{5420--5430}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Wireless Communications}}, title = {{Asymmetric Cooperation among Wireless Relays with Linear Precoding}}, url = {{http://dx.doi.org/10.1109/T-WC.2008.071305}}, doi = {{10.1109/T-WC.2008.071305}}, volume = {{7}}, year = {{2008}}, }