Transmit Antenna Selection with Maximal-Ratio Combining in MIMO Multiuser Relay Networks

2011 ◽  
Author(s):  
Nan Yang ◽  
Phee Lep Yeoh ◽  
M. Elkashlan ◽  
Jinhong Yuan ◽  
I. B. Collings
Keyword(s):  
Antenna Selection ◽  
Relay Networks ◽  
Maximal Ratio Combining ◽  
Transmit Antenna Selection

scholarly journals Secure Transmission for Simultaneous Wireless Information and Power Transfer in AF Untrusted Relay Networks

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 76 ◽  
Author(s):  
Hui Shi ◽  
Weiwei Yang ◽  
Dechuan Chen ◽  
Yunpeng Luo ◽  
Yueming Cai
Keyword(s):  
Outage Probability ◽  
Antenna Selection ◽  
Signal To Noise Ratio ◽  
Relay Networks ◽  
Optimal Number ◽  
Maximal Ratio Combining ◽  
High Signal ◽  
Secrecy Outage Probability ◽  
Transmit Antenna Selection ◽  
Untrusted Relay

This paper investigates secure communications of energy harvesting untrusted relay networks, where the destination assists jamming signal to prevent the untrusted relay from eavesdropping and to improve the forwarding ability of the energy constrained relay. Firstly, the source and the destination transmit the signals to the relay with maximal ratio transmission (MRT) technique or transmit antenna selection (TAS) technique. Then, the destination utilizes maximal ratio combining (MRC) technique or receive antenna selection (RAS) technique to receive the forwarded information. Therefore, four transmission and reception schemes are considered. For each scheme, the closed-form expressions of the secrecy outage probability (SOP) and the connection outage probability (COP) are derived. Besides, the effective secrecy throughput (EST) metric is analyzed to achieve a good tradeoff between security and reliability. In addition, the asymptotic performance of EST is also considered at the high signal-to-noise ratio (SNR). Finally, simulation results illustrate that: (1) the EST of the system with MRT and MRC scheme are superior to other schemes, however, in the high SNR regime, the EST of the system with MRT scheme is inferior to TAS; and (2) for the source node, there exists an optimal number of antennas to maximize the EST of the proposed schemes.

scholarly journals Outage Performance of Bidirectional Full-Duplex Amplify-and-Forward Relay Network with Transmit Antenna Selection and Maximal Ratio Combining

2018 ◽  
Vol 1 ◽  
pp. 62-69
Author(s):  
R. Rajesh ◽  
P. G. S. Velmurugan ◽  
S. J. Thiruvengadam ◽  
P. S. Mallick
Keyword(s):  
Antenna Selection ◽  
Relay Node ◽  
Maximal Ratio Combining ◽  
Full Duplex ◽  
Relay Network ◽  
Amplify And Forward ◽  
Transmit Antenna Selection ◽  
Outage Performance ◽  
Half Duplex ◽  
Af Relay

In this paper, a bidirectional full-duplex amplify- and-forward (AF) relay network with multiple antennas at source nodes is proposed. Assuming that the channel state information is known at the source nodes, transmit antenna selection and maximal ratio combining (MRC) are employed when source nodes transmit information to the relay node and receive information from the relay node respectively, in order to improve the overall signal-to-interference plus noise ratio (SINR). Analytical expressions are derived for tight upper bound SINR at the relay node and source nodes upon reception. Further, losed form expressions are also derived for end-to-end outage probability of the proposed bidirectional full-duplex AF relay network in the Nakagami-m fading channel environment. Although self-interference at the relay node limits the performance of the full-duplex network, the outage performance of the proposed network is better than that of conventional bidirectional full-duplex and half-duplex AF relay networks, due to the selection diversity gain in TAS and diversity and array gain in MRC.

scholarly journals Performance Analysis of Transmit Antenna Selection with MRC in MIMO for Image Transmission in Multipath Fading Channels Using Simulink

2015 ◽  
Vol 5 (1) ◽  
pp. 119
Author(s):  
Vaibhav S Hendre ◽  
M Murugan ◽  
Sneha Kamthe
Keyword(s):  
Performance Analysis ◽  
Fading Channels ◽  
Antenna Selection ◽  
Multiple Input Multiple Output ◽  
Image Transmission ◽  
Multipath Fading ◽  
Block Codes ◽  
Maximal Ratio Combining ◽  
Transmit Antenna Selection ◽  
Diversity Techniques

<em><span>Multiple antenna configurations can be used to increase the data throughput reducing the effects of multipath fading and interference when channel bandwidth is limited. Orthogonal Space Time Block Codes along with Transmit antenna selection can improve the performance of multiple input multiple output systems. In this paper, we present the Transmit Antenna Selection (TAS) technique based on the Maximal Ratio Combining (MRC) scheme with single antenna selection for image transmission. The performance analysis of the system was carried out under different fading channels i.e. Rayleigh and Rician channel for image input. We design end to end TAS/MRC system in Simulink with advancements in the channel designs and receive diversity techniques along with the feedback models. The Bit Error Rate (BER) analysis was performed for the combinations of number of transmit and receive antennas for TAS/MRC system for various fading environments.</span></em>

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