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this paper analyzes the performance of fixed decode-and-forward (FDF) relaying and selection decode-and-forward (SDF) relaying network over non-identical Nakagami-m fading channels. The colsed-form outage probabilities and average symbol error probabilities (ASEPs) are derived. Additionally, we provide closed-form outage probability in multiuser scenarios with maximum SNR schedule. These proposed...
In this paper, the performance of beamforming in two-hop relay networks with Rayleigh-Rician asymmetric fading channels is investigated. This network consists of a relay node equipped with a single antenna, a source and a destination node both equipped with multiple antennas. The first and the second hop are respectively subjected to Rayleigh and Rician fading. Transmit beamforming and receive beamforming...
This letter presents a study on statistical and symbol error performance analysis of the two-hop orthogonal frequency division multiplexing (OFDM) relay link with amplify-and-forward (AF) protocol and subcarrier mapping (SCM) scheme. Closed-form expressions for probability density function (PDF) and symbol error probability (SEP) of the signal-to-noise ratio (SNR) for the kth mapped subcarrier pair...
This paper analyzes the performance bound of variable gain relaying over non-identical Nakagami-m fading channel, and the closed-form expressions for average bit error probability (ABEP) of binary phase shift keying (BPSK)modulation and multiple amplitude modulation (M-AM) are derived. Numerical and simulation results show that the deduced performance bound is a tight lower bound especially at medium...
This paper analyzes the performance measures of amplify-and-forward (AF) relaying over non-identical Nakagami-m fading channel. The exact probability density functions (PDFs) of total signal-to-noise ratio (SNR) for variable gain relaying and fixed gain relaying are deduced, and the theoretical formulas of moment generating function (MGF) and moments for fixed gain relaying are presented. Since the...
We address the problem of frequency reuse schemes in the downlink of the fixed two-hop orthogonal frequency division multiple access (OFDMA) cellular relaying networks. There has been little work on specific frequency reuse schemes for this system in the literatures, although this is the key element for realizing the potential capacity and coverage increase offered by the relay. Therefore, we propose...
This paper derives the tight performance bound for average bit error probability (ABEP) of binary phase shift keying (BPSK) modulation and multiple amplitude modulation (M-AM), using variable gain relaying, over non-identical Nakagami-m fading channel. Additionally, we present other performance measures including approximate moments and amounts of fading (AoF). Numerical and simulation results show...
This paper provides three channel estimations including LS (least square) estimation, LMMSE (linear minimum mean square error) estimation and Lr-MMSE (low rank minimum mean square error) estimation utilized to the relay channel to approximate the optimal solution in OFDM system. The simulation results show that LMMSE estimation outperforms the other two estimations, but it is too complicated. The...
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