This paper concerns two-hop communication over relay-assisted Block fading channel. It is assumed there is not a direct link between the transmitter and the affiliated destination and the communication occurs in two hops through the use of a relay, where the amplify and forward (AF) strategy is employed at this node. In this case, in a Rayleigh block fading channel, the optimal weight function ...

❐ Gaussian channels with power-constraint; ❐ Band-limited Gaussian channels; ❐ Parallel Gaussian channels with average power-constraint (water-filling); ❐ Parallel coloured Gaussian channels with average power-constraint; ❐ Capacity of time-varying fading channels with channel state side-information; ❐ Capacity of Rayleigh fading channels with diversity and channel state side-information; ❐ Cap...

In this paper, novel Dual-Functional Radar-Communication (DFRC) waveforms with peak average power ratio (PAPR) constraint are designed, which under the multiple-input multiple-output (MIMO) radar-communication system. The DFRC transmitted by multiple antennas can send communication information to many downlink cellular users and detect radar targets simultaneously. An optimization model is esta...

This dissertation presents adaptation techniques that can achieve high spectral efficiency for single user multiple-input multiple-output (MIMO) systems. Two types of adaptation techniques, adaptive modulation and adaptive power allocation, are employed to adapt the rate and the transmit power to fading channels. We start by investigating the adaptive modulation subject to a certain bit-error-r...

We optimize modulation formats for the additive white Gaussian noise channel with a nonnegative input constraint, also known as the intensity-modulated direct-detection channel, with and without confining them to a lattice structure. Our optimization criteria are the average electrical, average optical, and peak power. The nonnegativity input signal constraint is translated into a conical const...