Abstract
We consider an OFDM-based decode-and-forward relay network with multiple uncorrelated equal power interferers over frequency-selective Rayleigh fading channels and derive a unified closed-form expression of average symbol-error ratio for M- ary phase-shift-keying (M-PSK) modulation. Simulations are carried out to validate our analyses.
Highlights
Relay communications, as a promising technique to help in attaining broader coverage and combating the impairments of the wireless channel, have gained significant interests at the beginning of this century [1,2,3]
The performance analysis of the relay network has attracted a lot of interest, considering different issues, such as cooperation protocols [4], channel models [5], power allocation schemes [6], and so on
In [10], the authors examine the feasibility of applying collaborative relays to the large-scale wireless network for the throughput improvement by modeling the interference-sensitive region
Summary
As a promising technique to help in attaining broader coverage and combating the impairments of the wireless channel, have gained significant interests at the beginning of this century [1,2,3]. Based on the model in [11], the authors in [12] consider the case where the destination is corrupted by a number of CCIs, while the relay is only perturbed by an additive white Gaussian noise (AWGN) and obtain the closed-form expression of the outage probability for the dual-hop relay system. For multiple relays and frequency-selective fading channels, more should be considered involving the selection of the relays, the combiner for combating multiple interferers at the relays and the destination, and so on. It remains an open problem to determine the performance of OFDM-based relay networks over frequency-selective fading channels. The performance of OFDM-based relay networks is a significative work for the system design. We consider an OFDMbased DF relay network over frequency-selective Rayleigh fading channels. CN(0, R) denotes a circularly symmetric complex normal zero mean random vector with covariance matrix R. ()T and ()H denote the transpose and conjugate transpose of a vector/matrix, respectively
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