DocumentCode :
46413
Title :
Joint Precoder and Receiver Design for AF Non-Simultaneous Two-Way MIMO Relaying
Author :
Budhiraja, Rohit ; Ramamurthi, Bhaskar
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India
Volume :
14
Issue :
6
fYear :
2015
fDate :
Jun-15
Firstpage :
2942
Lastpage :
2955
Abstract :
We investigate a joint design of linear precoders and receivers for multiple-input multiple-output non-simultaneous two-way relaying (NS-TWR). Unlike conventional two-way relaying, the base station in NS-TWR performs two-way relaying with two different users-a transmit-only user and a receive-only user (RUE). The RUE experiences back-propagating interference (BI). The proposed design cancels this BI and provides beamforming gain over existing designs. For NS-TWR, we maximize the weighted sum-rate (WSR) through joint power allocation, by solving a sequence of geometric programs. The precoder and the receiver designs as well as the power allocation program are then extended for a multi-user system with multiple transmit-only and receive-only users. With exhaustive simulations, we show that the proposed design provides significantly better WSR than the existing ones. The proposed design is also evaluated in a cellular framework using realistic path loss models, to assess the system-level performance gain achievable.
Keywords :
MIMO communication; amplify and forward communication; cellular radio; geometric programming; precoding; radio receivers; radiofrequency interference; relay networks (telecommunication); AF nonsimultaneous two-way MIMO relaying; BI; NS-TWR; RUE; WSR; backpropagating interference; base station; beamforming gain; cellular framework; geometric program sequence; joint linear precoder-receiver design; joint power allocation program; multiple-input multiple-output system; multiuser system; realistic path loss models; receive-only user; system-level performance gain; transmit-only user; weighted sum-rate; Bismuth; Downlink; MIMO; Receivers; Relays; Uplink; Vectors; Back-propagating interference; diagonalized channels; geometric program; non-simultaneous traffic;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2015.2398434
Filename :
7029137
Link To Document :
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