Conference Paper

# Amplify-and-Forward Relay Transmission with End-to-End Antenna Selection.

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

DOI: 10.1109/WCNC.2010.5506633 Conference: 2010 IEEE Wireless Communications and Networking Conference, WCNC 2010, Proceedings, Sydney, Australia, 18-21 April 2010 Source: DBLP

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**ABSTRACT:**We propose and analyze transmit antenna selection (TAS) to enhance physical layer security in a wiretap channel with multiple antennas at the transmitter, the receiver, and the eavesdropper. We consider the practical scenario of passive eavesdropping, where the transmitter does not have any channel state information (CSI) of the eavesdropper's channel. In the main channel between the transmitter and the receiver, we select a single antenna at the transmitter that maximizes the instantaneous signal-to-noise ratio (SNR) at the receiver. At the receiver and the eavesdropper, we consider two combining techniques: 1) maximal-ratio combining (MRC) and 2) selection combining (SC). For non-identical Rayleigh fading between the main channel and the eavesdropper's channel, we first derive new closed-form expressions for the exact and asymptotic secrecy outage probabilities. The asymptotic results accurately reveal the secrecy diversity order and the secrecy array gain. Next, we derive new closed-form expressions for the probability of positive secrecy and characterize the ε-outage secrecy capacity. We show that, under TAS/MRC and TAS/SC protocols, the secrecy outage probability approaches zero and the ε-outage secrecy capacity increases with increasing number of transmitter antennas.Global Communications Conference (GLOBECOM), 2012 IEEE; 01/2012 - [Show abstract] [Hide abstract]

**ABSTRACT:**Now-a-days, intense research is going on two-hop wireless link under different fading conditions with its remedial measures. In this paper work, a two-hop link under three different conditions is considered: (i) MIMO on both hops, (ii) MISO in first hop and SIMO in second hop and finally (iii) SIMO in first hop and MISO in second hop. The three models used here give the flexibility of using STBC (Space Time Block Coding) and combining scheme on any of the source to relay (S- R) and relay to destination (R-D) link. Even incorporation of Transmitting Antenna Selection (TAS) is possible on any link. Here, the variation of SER (Symbol Error Rate) is determined against mean SNR (Signal-to-Noise Ratio) of R-D link for three different modulation schemes: BPSK, 8-PSK and 16-PSK, taking the number of antennas and SNR of S-R link as parameters under Nakagami -m fading condition.12/2013; -
##### Conference Paper: Performance analysis of dual-hop MIMO-MRC AF relaying in the presence of co-channel interference at the destination

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**ABSTRACT:**In this paper, the performance of the dual-hop Multiple-input multiple-output (MIMO) amplify-and-forward (AF) relay systems with transmit beamforming and maximum ratio combining scheme (MIMO-MRC) is investigated over interference-limited Rayleigh fading channels. Exact closed-form expressions have been derived for the cumulative distribution function (CDF) and probability distribution function (PDF) of the equivalent signal-to-interference-plus-noise ratio (SINR), the outage probability, and average symbol error rate (SER). Finally, numerical results and Monte Carlo simulations are carried out, by which we verify the validity of our analysis and study the effects of various parameters on the system performance.Wireless Communications & Signal Processing (WCSP), 2012 International Conference on; 01/2012

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