On the ergodic capacities of decode‐and‐forward MIMO relay network with simultaneous wireless information and power transfer

This paper investigates destination-aided simultaneous wireless information and power transfer (SWIPT) for a decode-and-forward relay network, in which massive multiple-input multiple-output antennas are deployed at relay to assist communications among multiple source-destination pairs. During relaying, energy signals are emitted from multiple destinations when multiple sources are sending their information signals to relay. With power splitting and unlimited antennas at relay, asymptotic expression of harvested energy is derived. The analysis reveals that asymptotic harvested energy is independent of fast fading effect of wireless channels; meanwhile transmission powers of each source and destination can be scaled down inversely proportional to the number of relay antennas. To significantly reduce energy leakage interference and multipair interference, zero-forcing processing and maximum-ratio combing/maximum-ratio transmission are employed at relay. Fundamental trade-off between harvested energy and achievable sum rate is quantified. It is shown that asymptotic sum rate is neither convex nor concave with respect to power splitting and destination transmission power. Thus, a one-dimensional embedded bisection algorithm is proposed to jointly determine the optimal power splitting and destination transmission power. It shows that destination-aided SWIPT are beneficial for harvesting energy and increasing sum rate. The significant sum rate improvements of the proposed schemes are verified by numerical results.

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Performance Analysis of MIMO Relay Network via Propagation Measurement in L-Shaped Corridor Environment

IEICE Transactions on Communications ◽

10.1587/transcom.e95.b.1345 ◽

2012 ◽

Vol E95-B (4) ◽

pp. 1345-1356 ◽

Cited By ~ 1

Author(s):

Namzilp LERTWIRAM ◽

Gia Khanh TRAN ◽

Keiichi MIZUTANI ◽

Kei SAKAGUCHI ◽

Kiyomichi ARAKI

Keyword(s):

Performance Analysis ◽

Relay Network ◽

Mimo Relay ◽

Propagation Measurement

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On Performance of Combining Methods for Three-Node Relay Network

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.263-266.1160 ◽

2012 ◽

Vol 263-266 ◽

pp. 1160-1164

Author(s):

Wen Yuan Rao

Keyword(s):

Relay Network ◽

Estimation Accuracy ◽

Diversity Order ◽

Amplify And Forward ◽

Decode And Forward ◽

Channel Quality ◽

Combining Methods ◽

Better Than

We study the performance of the three-node relay network. Three combining methods for the Amplify-and-Forward (AF) protocol and the Decode-and-Forward (DF) protocol are compared. Simulations indicate that the AF protocol is better than DF under all these three combining methods. To combine the incoming signals the channel quality should be estimated as accuracy as possible, more estimation accuracy requires more resource. A very simple combining method can obtain the performance comparative with optimal combining methods approximately. At the same time, all three combining methods for both diversity protocols can achieve the maximum diversity order.

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