Amplify and Forward Relaying Systems for Collocated Antennas

Power Allocation for Amplify-and-Forward Opportunistic Relaying Systems

In this letter, power allocation methods are devised for Amplify-and-Forward (AF) opportunistic relaying systems aiming at minimizing the outage probability. First, we extend the result on outage probability in [8] and develop an approximate expression to simplify the power allocation problem. A corresponding optimization problem is constructed and proved to be convex. Then an iterative numeric...

Cooperative Amplify-and-Forward Relaying Systems with Quadrature Spatial Modulation

Quadrature spatial modulation (QSM) is a recent digital multiple-input multiple-output (MIMO) transmission technique. Combined with cooperative relaying, QSM improves the overall spectral efficiency and enhances the communication reliability. In this paper, we study the performance of QSM amplify-and forward cooperative relaying systems. In particular, a closed-form expression for the average p...

Overview of Amplify- and-Forward Relaying

Cooperative diversity has emerged as a promising technique to combat fading in wireless communications (Sendonaris et. al., 2003a; Sendonaris et. al., 2003b). It is based on the broadcast nature of the wireless medium and enables single-antenna users to “enjoy” space diversity benefits by sharing their physical resources through a virtual transmit and/or receive antenna array. The basic relay c...

Static hybrid amplify and forward (AF) and decode and forward (DF) relaying for cooperative systems

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Are Amplify-and-Forward Relaying and Decode-and-Forward Relaying the Same?