Next Article in Journal
Investigating Random Linear Coding from a Pricing Perspective
Next Article in Special Issue
Dynamic Rounds Chaotic Block Cipher Based on Keyword Abstract Extraction
Previous Article in Journal
A Novel Codeword Selection Scheme for MIMO-MAC Lower-Bound Maximization
Open AccessArticle

Achievable Rate Region under Linear Beamforming for Dual-Hop Multiple-Access Relay Network

1
The State Key Laboratory of Integrated Services Network, Xidian University, Xi’an 710071, China
2
Bell Labs., Alcatel-Lucent, Shanghai 201206, China
*
Author to whom correspondence should be addressed.
Entropy 2018, 20(8), 547; https://doi.org/10.3390/e20080547
Received: 20 May 2018 / Revised: 18 July 2018 / Accepted: 21 July 2018 / Published: 24 July 2018
(This article belongs to the Special Issue Information Theory Applications in Signal Processing)
Consider a network consisting of two independent single-antenna sources, a single-antenna destination and a helping multiple-antenna relay. This network is called a dual-hop multiple access relay network (MARN). In this network, sources transmit to the relay simultaneously in the first time slot. The relay retransmits the received sum-signal to the destination using a linear beamforming scheme in the second time slot. In this paper, we characterize the achievable rate region of MARN under linear beamforming. The achievable rate region characterization problem is first transformed to an equivalent “corner point” optimization problem with respect to linear beamforming matrix at the relay. Then, we present an efficient algorithm to solve it via only semi-definite programming (SDP). We further derive the mathematical close-forms of the maximum individual rates and the sum-rate. Finally, numerical results demonstrate the performance of the proposed schemes. View Full-Text
Keywords: beamforming; multiple-access relay network (MARN); achievable rate region; semi-definite relaxation; semi-definite programming beamforming; multiple-access relay network (MARN); achievable rate region; semi-definite relaxation; semi-definite programming
Show Figures

Figure 1

MDPI and ACS Style

Feng, G.; Guo, W.; Liu, B. Achievable Rate Region under Linear Beamforming for Dual-Hop Multiple-Access Relay Network. Entropy 2018, 20, 547.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop