Abstract
Radio spectrum is becoming scarce due to increasing demand for high data rate, mobile communication and ever-expanding population with diverse need to always stay interconnected. The cellular network providers and researchers in the academia are continually finding innovative ways to efficiently manage the existing telecommunication infrastructure and plan effective for future expansions and technology. Device to Device (D2D) communication, Full-Duplex (FD) radio, Heterogeneous network are a few of such innovative technologies developed to face the challenges. Device to device communication is one promising technology that is studied for deployment in future network technologies, however it is not without its challenges. Various researches have been carried out and are still being carried out to better understand and improve device to device capabilities. The use of full-duplex radios is an area of study with capability for improving device to device communication due to recent development in full-duplex radio although its major drawback is limited self-interference cancellation abilities to be deployed in large transmit power system. This research presents the practicality of deploying existing FD radios in device to device communication and simulate the amount of self-interference cancellation required using MATLAB for effective use with device to device. Two interference management schemes were implemented to improve the performance of FD-D2D communication, first power control scheme was developed to mitigate interference between D2D and base station in uplink resource sharing, Interference Limited Area (ILA) method was adapted to deal with interference between D2D and cellular user Uplink and Downlink transmission. The performance between 75dB to 110dB Self-Interference (SI) cancellation was carried out. The result was compared to conventional cellular and Half-Duplex D2D communication to estimate the improvement offered on spectral efficiency. The work has improved on achieving almost 100% spectral efficiency thereby improving the Quality of Service (QoS) for cellular network
Highlights
Increasing demand for wireless communications services is leading to the congestion of radio spectrum
We propose adopting a Power control scheme to manage interference on the base station for uplink resource sharing in device to device transmitters, and Interference limited area (ILA) method is proposed to mitigate interference on device to device receivers for uplink and downlink resource sharing
The aim of this dissertation is to improve on the spectral efficiency of full-duplex radios in D2D communication in cellular network
Summary
Increasing demand for wireless communications services is leading to the congestion of radio spectrum. 110 dB of self-interference cancelation is possible for single antenna and multi antenna systems [3,4] Considering these achievements, investigation of possible application areas of available full-duplex radios becomes an interesting topic. FD communications allow a user equipment (UE) to transmit and receive signals at the same time over the same frequency, and can potentially double spectral efficiency [13]. It has long been regarded as impractical in the past due to strong self-interference (SI). Knowing the amount of self-interference cancelation required for device to device communication will make it possible to consider fullduplex radios in future standards of wireless systems. The diagram shows how the scheme of combining Full duplex radios in a D2D communication underlying a cellular network
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