This work focuses on the half-duplex (HD) relaying based on the generalized quantize-andforward (GQF) scheme in the slow fading Multiple Access Relay Channel (MARC). We consider the case that the relay has no channel state information (CSI) of the relay-to-destination link. Relay listens to the channel in the first slot of the transmission block and cooperatively transmits to the destination in...

This work focuses on the half-duplex (HD) relaying based on the generalized quantize-andforward (GQF) scheme in the slow fading Multiple Access Relay Channel (MARC). We consider the case that the relay has no channel state information (CSI) of the relay-to-destination link. Relay listens to the channel in the first slot of the transmission block and cooperatively transmits to the destination in...

The motivation of this thesis is to understand how nodes can cooperate in a particular relay channel, say a relay channel with orthogonal link between relay and destination. We are especially interested in the scenario where relay cannot decode the message sent because the coding rate is too large vis-a-vis what it can handle, and try to investigate the optimality of compress-and-forward strate...

We analyze the effect of feedback delay and channel estimation errors in a decode-and-forward (DF) relay selection scenario. Amongst all the relays that decode the source information correctly, only one relay with the best relay-to-destination (R → D) channel quality is selected. More specifically, the destination terminal first estimates the relay-destination channel state information (CSI) an...

Problem statement: Multiple Input and Multiple Output (MIMO) system with Multihop relaying techhnique is significant and active areas of wireless communication. In a rich scattering environment MIMO antenna system provides better channel capacity and data rates than single antenna systems. To provide high throughput, reliable transmission and broad coverage, wireless relaying techniques are ess...

In this paper, a Gaussian two-way relay channel, where two source nodes exchange messages with each other through a relay, is considered. We assume that all nodes operate in full-duplex mode and there is no direct channel between the source nodes. We propose an achievable scheme composed of nested lattice codes for the uplink and structured binning for the downlink. We show that the scheme achi...

In this paper, a cooperative algorithm to improve the orthogonal space-timefrequency block codes (OSTFBC) in frequency selective channels for 2*1, 2*2, 4*1, 4*2 MIMO-OFDM systems, is presented. The algorithm of three node, a source node, a relay node and a destination node is formed, and is implemented in two stages. During the first stage, the destination and the relay antennas receive the sym...

The cooperative relay channel is a recent model for the exploitation of the spatial channel. One user node relays information from the source to the destination which in turn improves the error rate performance due the multiple receive copies i.e. diversity gain. The foundation for any investigation of cooperative diversity channels is based on an accurate and reliable simulation environment. T...

We consider the wireless Rayleigh fading relay channel with finite complex input constellations. Assuming global knowledge of the channel state information and perfect synchronization, upper and lower bounds on the achievable rate, for the full-duplex relay, as well as the more practical halfduplex relay (in which the relay cannot transmit and receive simultaneously), are studied. Assuming the ...