Performance analysis of space shift keying (SSK) modulation with multiple cooperative relays

Abstract

International audienceIn this article, space shift keying (SSK) modulation is used to study a wireless communication system when multiple relays are placed between the transmitter and the receiver. In SSK, the indices of the transmit antennas form the constellation symbols and no other data symbol are transmitted. The transmitter and the receiver communicate through a direct link and the existing relays. In this study, two types of relays are considered. Conventional amplify and forward relays in which all relays amplify their received signal and forward it to the destination in a round-robin fashion are considered. In addition, decode and forward relays in which the relays that correctly detect the source signal will forward the corresponding fading gain to the destination in pre-determined orthogonal time slots are studied. The optimum decoder for both communication systems are derived and performance analysis are conducted. The exact average bit error probability (ABEP) over Rayleigh fading channels is obtained in closed-form for a source equipped with two transmit antennas and arbitrary number of relays. Furthermore, simple and general asymptotic expression for the ABEP is derived and analyzed. Numerical results are also provided, sustained by simulations which corroborate the exactness of the theoretical analysis. It is shown that both schemes perform nearly the same and the advantages and disadvantages of each are discussed

On the Performance of Full-Duplex Two-Way Relay Channels With Spatial Modulation

“…In [21], the authors analyzed the distributed SSK in relay-aided uplink cellular networks. Furthermore, the authors in [22] analyzed the performance of SSK relay systems with multiple cooperative relays considering both amplify-and-forward (AF) and decode-and-forward (DF) protocols. A bit error probability analysis of SSK in DF relay channels with best relay selection is conducted in [23].…”

An adaptive transmission protocol for exploiting diversity and multiplexing gains in wireless relaying networks

“…However, the overall achieved diversity gain was limited to the number of receive antennas, as only one relay was active for any given transmission. This was partially solved when employing SM specifically at the source node and leaving the full diversity gain to be achieved in the link between the relays and the destination [25,27,28]. The effective use of SM was still bounded by the number of antennas available at the source node.…”

BER Analysis of Space Shift Keying in Cooperative Multi-Hop Multi-Branch DF Relaying

“…Likewise, at every hop, the relays in each diversity branch forward the regenerated symbol if the decoding is correct. This relaying protocol has been considered for SSK in dual-hop multiple relay cooperative system in [8]. Each branch B l , that correctly decodes the signal at the relay terminal R M l ,l , forwards the decoded SSK signal to D in different time slots.…”

“…In [7], the bit error rate (BER) performance of SSK in amplifyand-forward (AF) dual-hop relay channel in the absence of direct link between the source and the destination was analyzed. In [8], the BER analysis of dual-hop cooperative net-work with multiple relays for DF and AF relaying protocol was presented.…”

“…Recent works [3]- [8] have considered the concept of SM/SSK in relay assisted communication. SM was considered for decode-and-forward (DF) non-cooperative dual-hop relay channel in [3].…”