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

ABSTRACT In this paper, the performance of a dual-hop Amplify-and-Forward (AF) multi-antenna relay network, with end-to-end (e2e) best antenna selection, is investigated. To investigate the performance of this system, we first derive the exact outage probability in closed-form. It is then used to obtain expressions for e2e SNR moments and the average symbol/bit error rate (SER/BER) valid for a large class of practical modulation schemes. A simple and accurate BER approximation is also derived to quantify the performance at high SNR. Our analytical results, show that the e2e antenna pair selection scheme achieves the same diversity order as for the case where all antennas are used. To further confirm the validity of our analysis, Monte Carlo simulation results are also presented.

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Available from: George K. Karagiannidis, Jul 23, 2014
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    • "Transmit antenna selection (TAS) with receive maximal-ratio combining (MRC) in MIMO relaying was proposed in [13]. In TAS/MRC relaying, a single antenna is selected at the transmitters and all the antennas at the receivers are MRC combined [14]. In [15], authors presented a framework for the comparative analysis of TAS/MRC and TAS with receive selection combining (TAS/SC) in a two-hop AF relay network. "
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    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.
    International Journal of Advanced Computer Science and Applications 12/2013; 4(7). DOI:10.14569/IJACSA.2013.040719 · 1.32 Impact Factor
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    • "The performance of AS in half-duplex relay systems is a mature topic and well studied, see for e.g., [21]–[24]. On the other hand, to the best of authors' knowledge, the current paper is the first to analytically investigate the AS performance for full-duplex relay systems. Moreover, our analysis presents new results in addition to earlier work such as [25], [26] where the outage probability of single antenna full-duplex systems have been studied. "
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    ABSTRACT: In this paper, we deal with the deployment of full-duplex relaying in amplify-and-forward (AF) cooperative networks with multiple-antenna terminals. In contrast to previous studies, which focus on the spatial mitigation of the loopback interference (LI) at the relay node, a joint precoding/decoding design that maximizes the end-to-end (e2e) performance is investigated. The proposed precoding incorporates rank-1 zero-forcing (ZF) LI suppression at the relay node and is derived in closed-form by solving appropriate optimization problems. In order to further reduce system complexity, the antenna selection (AS) problem for full-duplex AF cooperative systems is discussed. We investigate different AS schemes to select a single transmit antenna at both the source and the relay, as well as a single receive antenna at both the relay and the destination. To facilitate comparison, exact outage probability expressions and asymptotic approximations of the proposed AS schemes are provided. In order to overcome zero-diversity effects associated with the AS operation, a simple power allocation scheme at the relay node is also investigated and its optimal value is analytically derived. Numerical and simulation results show that the joint ZF-based precoding significantly improves e2e performance, while AS schemes are efficient solutions for scenarios with strict computational constraints.
    IEEE Transactions on Wireless Communications 11/2013; 13(2). DOI:10.1109/TWC.2013.122313.130608 · 2.76 Impact Factor
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    • "Here, the e2e transmission takes place by selecting the best Tx/Rx antenna pair at both S → R and R → D MIMO channels. Reference [10] extends [9] by deriving the asymptotic outage probability and average SER. In addition, [19] extends the analysis of [9] for Nakagami-m fading. "
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    ABSTRACT: The performance of three transmit antenna selec-tion (TAS) strategies for dual-hop multiple-input–multiple-output (MIMO) ideal channel-assisted amplify-and-forward (AF) re-lay networks is analyzed. All channel fades are assumed to be Nakagami-m (integer m) fading. The source, relay, and desti-nation are MIMO terminals. The optimal TAS and two subop-timal TAS strategies are considered. Since direct analysis of the end-to-end signal-to-noise ratio (e2e SNR) of the optimal TAS is intractable, a lower bound of the e2e SNR is derived. Its cumu-lative distribution function and the moment generating function (mgf) are derived and used to obtain the upper bounds of the outage probability and the average symbol error rate (SER). For the two suboptimal TAS strategies, we derive the exact mgfs of the e2e SNR and obtain accurate and efficient closed-form approximations for the outage probability and the average SER. The asymptotic outage probability and the average SER, which are exact in high SNR, are also derived, and they provide valuable insights into the system design parameters, such as diversity order and array gain. The exact outage probability, average SER, and their high SNR approximations are also derived for the optimal TAS when the direct path is ignored. The impact of outdated channel state information (CSI) on the performance of TAS is also studied. Specifically, the amount of performance degradation due to feedback delays is studied by deriving the asymptotic outage probability and the average SER and thereby quantifying the reduction of diversity order and array gain. Numerical and Monte Carlo simulation results are provided to analyze the system performance and verify the accuracy of our analysis. Index Terms—Amplify-and-forward (AF) relaying, cooperative multiple-input–multiple-output (MIMO) relay networks, transmit antenna selection (TAS).
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