Multiuser Two-Way Nonregenerative MIMO Relaying With Nonconcurrent Traffic

Author

Budhiraja, Rohit ; Ramamurthi, Bhaskar

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India

Volume

64

Issue

7

fYear

2015

fDate

Jul-15

Firstpage

3268

Lastpage

3273

Abstract

Multiuser two-way relaying (MWR) enables multiple users to exchange data with a base station (BS) via a half-duplex relay in two channel uses. MWR assumes a specific traffic pattern, where users concurrently transmit/receive data to/from the BS. In this paper, we design a multiple-input-multiple-output (MIMO) two-way relaying protocol for a nonconcurrent traffic scenario, where one set of users transmits data to the BS in the first channel use, whereas another set of users receives data from the BS in the second channel use. By designing a novel linear precoder at the nonregenerative relay and by applying dirty-paper coding (DPC) at the BS, we maximize the: 1) minimum rate among all users; and 2) weighted sum rate (WSR) of the system, via the formulation of two geometric programs. Simulation results demonstrate the improved performance of the proposed precoder over conventional ones.

Keywords

MIMO communication; channel coding; data communication; geometric programming; linear codes; multiuser channels; precoding; protocols; relay networks (telecommunication); telecommunication traffic; DPC; base station; data exchange; data transmission; dirty paper coding; geometric program; half-duplex relay; linear precoder; multiple input multiple output system; multiuser two-way nonregenerative MIMO relaying protocol; nonconcurrent traffic scenario; Bismuth; Matrix decomposition; Protocols; Relays; Signal to noise ratio; Uplink; Vectors; Dirty-paper coding (DPC); geometric program (GP); linear precoder; nonconcurrent traffic; two-way relay;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2014.2348574

Filename

6879285