Packet-Size Optimization for Multiple-Input Multiple-Output Cognitive Radio Sensor Networks-Aided Internet of Things

Wavelet Packet Transform Modulation for Multiple Input Multiple Output Applications

An investigation into the wavelet packet transform (WPT) modulation scheme for Multiple Input Multiple Output (MIMO) band-limited systems is presented. The implementation involves using the WPT as the base multiplexing technology at baseband, instead of the traditional Fast Fourier Transform (FFT) common in Orthogonal Frequency Division Multiplexing (OFDM) systems. An investigation for a WPT-MI...

Energy Constrained Packet Size Optimization for Cluster-based Cognitive Radio-based Wireless Sensor Networks

The increased deployment of WSN using the unlicensed spectrum band-Industrial Scientific and Medical (ISM) has led to the increasing demand for communication channel within the ISM band due to overcrowding. This resulted in the cognitive radio (CR) paradigm. Critical issue in cognitive radio-based wireless sensor networks is the need to minimize energy consumption without undermining the qualit...

A Multiband Multiple-input Multiple-output Antenna System for Long Term Evolution and Wireless Local Area Networks Handsets

A novel multiband multiple-input-multiple-output (MIMO) antenna system is proposed. The MIMO antenna system consists of two antenna elements, each of which comprises of three radiators: a driven monopole, an S-shaped strip and an inverted F-shaped strip and occupies footprint of 15x18.5x0.8 mm3 only. The driven monopole acts as a quarter-wave monopole and stimulate higher mode resonance. The tw...

Modeling of Multiple-Input Multiple-Output Radio Propagation Channels

Transmit Optimization for Multicarrier and Multiple - Input Multiple - Output Wireless

To meet growing demand for wireless access to voice, data and multimedia services, current wireless communication technologies need further improvement in spectral efficiency. Many enabling technologies have been proposed, including multicarrier modulation, multiple-input multiple-output (MIMO) and link adaptation. This thesis investigates link adaptation, particularly transmit optimization in ...