Coordinated Direct and Relay Transmission with Linear Non-Regenerative Relay Beamforming

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Resumé

Joint processing of multiple communication flows in wireless systems has given rise to a number of novel transmission techniques, notably the two-way relaying, but also more general traffic scenarios, such as coordinated direct and relay (CDR) transmissions. In a CDR scheme the relay has a central role in managing the interference and boosting the overall system performance. In this letter we consider the case in which an amplify-and-forward relay has multiple antennas and can use beamforming to support the coordinated transmissions. We focus on one representative traffic type with one uplink user and one downlink user. Two different criteria for relay beamforming are analyzed: maximal weighted sum-rate and maximization of the worst-case weighted SNR. We propose iterative optimal solutions, as well as low-complexity near-optimal solutions.
OriginalsprogEngelsk
TidsskriftI E E E Signal Processing Letters
Vol/bind19
Udgave nummer10
Sider (fra-til)680 - 683
Antal sider4
ISSN1070-9908
DOI
StatusUdgivet - 2012

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Beamforming
Relay
Optimal Solution
Traffic
Multiple Antennas
Antennas
Amplify-and-forward
Uplink
Boosting
Weighted Sums
Communication
Low Complexity
System Performance
Processing
Interference
Scenarios

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Coordinated Direct and Relay Transmission with Linear Non-Regenerative Relay Beamforming. / Sun, Fan; De Carvalho, Elisabeth; Popovski, Petar; Thai, Chan.

I: I E E E Signal Processing Letters, Bind 19, Nr. 10, 2012, s. 680 - 683.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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