Nader Nassar is in the final year of his Bachelors Degree in Telecommunication Engineering at the University of Wollongong. His professional memberships include the following but not limited to; Institute of Electrical and Electronics Engineers (IEEE), Engineers Australia, and AIESEC
As technology has been evolving in the last decade with respect to different disciplines. Today, we focus on the communication scheme and its integration through Power Line Communication (PLC) and Visible Light Communication (VLC) systems. Most of the current proposed integrated systems are through Direct Sequence Spread Spectrum (DSSS) and OFDM techniques, where they are considered as candidates for future broadband PLC networks. Some work has been done in the area of using power line for communications but these systems suffers from noise and distortion. Our work is different in a sense it is incorporating turbo codes in the integrated system to increase the system robustness to noise and distortion.. The signal data to be transmitted will be connected through the Power Line modulator which is connected to the wall socket. The PLC modulator is then connected to the VLC modulator for the transmission of the signal in the air. . At the receiver side however, the transmitted signal is then received through the VLC demodulator followed by the PLC demodulator. By introducing the turbo coder and decoder we anticipate to have better performance for the integrated system to noise and distortion. The use of the OFDM with multiple carriers in the system will enable multiple users to access the system simultaneously. The performance of the system will be measured through comparing the BER rate for the system with and without the turbo codes. The BER rate will be measured with respect to the signal to noise ratio, data rate and distance
Samavia Rizwan is in the final year of his Bachelors Degree in Electrical Engineering at the University of Wollongong. His professional memberships include the following but not limited to; Institute of Electrical and Electronics Engineers (IEEE), and Engineers Australia.
Wireless internet access technology can experience a major revolution through the use of breakthrough technology of Visible Light Communication (VLC) or Li-Fi (light fidelity) which could promise much higher data rates and better security and integrity of the data at the physical layer. There are many challenges being faced when visible light communication is being used resulting in low efficiency of the system. The main purpose of this paper is to endeavour to achieve highest data rate possible in an indoor environment while tackling problems which include low modulation bandwidth of the transmitters currently used. This paper targets two novel techniques of orthogonal frequency division multiplexing (OFDM) and single carrier frequency-domain equalization (SC-FDE) for gigabyte per second (Gbps) short-range optical wireless access networks based on direct intensity modulation with direct detection (IM-DD). Efficiency was measured in terms of peak-to-average power ratio (PAPR) where a significant reduction was obtained relative to asymmetrically clipped optical OFDM (ACO-OFDM). Bit error performance (BER) was also an indicator of efficiency for both the methods. The use of polar representation for complex signals were proposed to achieve a much higher data rate and spectral efficiency so the novel idea of using Polar OFDM and Polar SC-FDE were investigated and evaluated.