MIMO cooperative multiple-relay networks with OSTBCs over Nakagami-m fading

Abstract

In this paper, the performance of a dual-hop multiple-input multiple-output (MIMO) cooperative multiplerelay network using orthogonal space-time block coding (OS-TBC) transmission is examined. The fading environment is modeled as independent, not identical distributed (i.n.i.d.) Nakagamifading. Also, we consider the case that each terminal in the network has multiple-antennas, the relays operate in channel state information (CSI)-assisted amplify-and-forward (AF) relaying mode, and the direct transmission from the source to the destination is applicable. In particular, we derive a closedform expression for the moment generating function (MGF) of the instantaneous signal-to-noise ratio (SNR). Utilizing this derivation, we can analyze the SER performance of the considered system for -ary phase shift-keying ( -PSK) and -ary quadrature amplitude modulation ( -QAM) scheme. Also, the outage performance of the considered relay networks is evaluated. We further investigate the cooperative diversity behavior by deriving asymptotic approximations for the outage probability and the SER. Finally, numerical results are provided showing very close agreement between the analytical results and the Monte-Carlo simulations.

Exact SEP and performance bounds for orthogonal space‐time block codes in cooperative multiantenna AF relaying networks

“…Many researches have widely discussed for cooperative relay networks. () Two main relay categories are dual‐hop (DH) and multihop (MH) schemes, which are usually used as to obtain a cooperative diversity. () In addition, two main cooperation protocols have been proposed in the literature, such as amplify‐and‐forward (AF) and decode‐and‐forward (DF) cooperation.…”

“…To obtain the spatial diversity gain under the reasonable complexity at the relay node, orthogonal space‐time block code (OSTBC) in multiple‐input multiple‐output (MIMO) relaying networks have been also investigated. () Chalise and Vandendorpe analyzed the outage probability for OSTBC transmission over DH relay networks with DF protocol, assuming that each node is equipped with multiple antennas. Zhang et al derived exact formulas of the outage probability and its approximation in high signal‐to‐noise ratio (SNR) region for cognitive DF relay network in a spectrum sharing scenario with OSTBC transmission.…”

“…Under assuming for relay networks that the source is equipped with multitransmit antennas and both the relay and destination are single antenna nodes, Chen et al presented an exact SER and outage probability expressions for relay gains with and without noise variance. Phan et al studied the performance of a DH MIMO AF cooperative relay network with OSTBC transmission over Nakagami‐ m fading channels. The MGF of the instantaneous SNR was derived to obtain the analytical expressions for the outage probability and the SER, and then, the asymptotic results were shown to investigate the cooperative diversity behavior.…”

Performance Analysis of OSTBC for Fixed Gain Relay Network over Nakagami-m Fading with Correlated Antennas

“…OSTBC with channel state information (CSI) assisted AF relay networks is investigated in [4], [5]. Beamforming at the source, a single antenna with CSI assisted relay, and maximal ratio combining (MRC) at the destination is analyzed with antenna correlation over Rayleigh fading in [2].…”

“…Outage probability and average symbol error rate (SER) are derived, followed by the asymptotic analysis of outage probablity. Multiple relays with multiple antennas for all nodes (source, relays, and destination) are considered in [5], where the direct transmission is available. The moment generative function (MGF) of the instantaneous end-to-end SNR, outage probability, SER and the asymptotic outage probability are derived over independent and non identically distributed (i.n.i.d.)…”