Symbol error probability of hop-by-hop beamforming in Nakagami-m fading (original) (raw)
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Cooperative Dual-Hop Relaying Systems with Beamforming over Nakagami-m Fading Channels
IEEE Transactions on Wireless Communications, 2009
In this paper, we investigate the end-to-end performance of dual-hop relaying systems with beamforming over Nakagami-m fading channels. Our analysis considers semiblind (fixed-gain) relays with single antennas, and source and destination nodes equipped with multiple antennas. Closed-form expressions for the outage probability (OP), moment generating function (MGF), and generalized moments of the end-to-end signal-to-noise ratio (SNR) are derived. The proposed expressions apply to general operating scenarios with distinct Nakagamim fading parameters and average SNRs between the hops. The influence of the power imbalance, fading parameters, and antenna configurations on the overall system performance are analyzed and discussed through representative numerical examples. Furthermore, the exactness of our formulations is validated by means of Monte Carlo simulations.
KSII Transactions on Internet and Information Systems, 2018
In this paper, we derive the theoretical Symbol Error Probability (SEP) of cooperative systems with best relay selection for Nakagami-m fading channels. For Amplify and Forward (AF) relaying, the selected relay offers the best instantaneous Signal to Noise Ratio (SNR) of the relaying link (source-relay-destination). In cooperative networks using Decode and Forward (DF), the selected relay offers the best instantaneous SNR of the link between the relay and the destination among the relays that have correctly decoded the transmitted information by the source. In the second part of the paper, we derive the SEP when all participating AF and DF relaying is performed. In the last part of the paper, we extend our results to cognitive radio networks where there is interference constraints : only relays that generate interference to primary receiver lower than a predefined threshold T can transmit. Both AF and DF relaying with and without relay selection are considered.
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We analyze the performance of amplify-andforward (AF) multiple-input multiple-output (MIMO) cooperative networks over independent but not identically distributed Nakagami-m fading channels. Specifically, we consider an AF MIMO relay network where the source deploys the transmit antenna selection scheme to communicate with the destination through the help of a relay. We derive analytical expressions for outage probability (OP) and symbol error probability (SEP). Moreover, asymptotically tight approximations for OP and SEP have been obtained to facilitate insights on how fading parameters affect the performance. Our analytical results are verified by Monte-Carlo simulations for respective scenarios.
Interference-Limited Relaying Transmissions in Dual-Hop Cooperative Networks over Nakagami-m Fading
IEEE Communications Letters, 2000
In this letter, we investigate the outage performance of dual-hop decode-and-forward (DF) cooperative systems in an interference-limited Nakagami-m fading environment. More specifically, assuming the presence of Nakagami-m faded multiple co-channel interferers at the DF relay and a noisy destination, simple accurate closed-form approximations for the end-to-end outage probability are derived. To this end, moment-based estimators are used to attain the appropriate Nakagami-m fading parameters. Simulation results are presented in order to confirm the accuracy of the proposed approximations.
Performance analysis of cooperative diversity wireless networks over Nakagami-m fading channel
2007
Abstract This letter analyzes the performance of cooperative diversity wireless networks using amplify-and-forward relaying over independent, non-identical, Nakagami-m fading channels. The error rate and the outage probability are determined using the moment generating function (MGF) of the total signal-to-noise-ratio (SNR) at the destination. Since it is hard to find a closed form for the probability density function (PDF) of the total SNR, we use an approximate value instead.
IEEE Communications Letters, 2000
This letter analyzes the performance of multiuser diversity in multi-hop cooperative relay networks (MCRNs). In this letter, we derive a novel, simplified, asymptotic expression for the average symbol error rate (ASER) of multiuser MCRNs operating over Rayleigh or Nakagami-fading channels (with arbitrary fading parameters). Both theoretical analysis and simulations explicitly reveal that for multiuser MCRNs operating over Rayleigh or Nakagami-fading channels, a diversity order of 2 or 2 can respectively be achieved (where represents the number of users and is the Nakagami fading parameter).
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference, 2009
We derive new exact closed-form expressions for the symbol error rate (SER) of cooperative selection diversity (CSD) with amplify-and-forward (AF) transmission using channel-stateinformation (CSI)-based gain relaying. We consider the general fading condition of independent but not necessarily identically distributed (i.n.d.) Nakagami-m fading. We also present a closedform expression for i.n.d. Rayleigh fading as a special case. We highlight the impact of the m fading parameter on the SER performance in unbalanced fading conditions. Numerical results substantiate the validity of our analysis.
Cooperative Relayed Network under Rayleigh and Nakagami-m Fading Channel
IJCSIS, 2019
In dual-hop wireless link, the cooperative relayed link shows better performance compared to single relayed communication case. In this paper we consider the received SNR (signal to noise ratio) of cooperative relay network as a random variable (r.v.) then we derive cdf (cumulative distribution function) and pdf (probability density function) of received signal. The paper extends the MGF (moment generating function) based model of single antenna of previous work to multiple antenna model, which provides better results. Two analytical models: ‘combining schemes’ and ‘upper bound of SNR under moment generating function’ are used to measure SER (symbol error rate) of the network. The theoretical results are finally verified by simulation and yields 95% confidence level. Keywords- Combining schemes, pdf, MGF, SNR and SER