^2nd International Conference and Business Expo on Wireless & Telecommunication April 21-22, 2016 The Oberoi Centre, Dubai, UAE

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.

Yassine El Mouden is a student in the final year of his Bachelor’s Degree in Electrical Engineering at the University of Wollongong. His research and academic interests include digital and statistical signal processing, image processing, wireless communication systems, and control systems. His professional memberships include the following but not limited to; Institute of Electrical and Electronics Engineers (IEEE), and Engineers Australia (EA).

The performance of MIMO wireless communication systems is mainly governed by the wireless channel environment. The wireless channel is dynamic and unpredictable, which makes an exact analysis of the wireless communication system often difficult. Linear equations of very high dimensions arising from the pilot-based channel estimators need to be solved for massive Multiple-Input-Multiple-Output (MIMO) communication systems. It is one of the key techniques for future generation wireless communications (e.g. 5G) to improve the power and spectral efficiency. Direct solutions incur very high complexities. Schemes based on polynomial-based inversion of large matrices are designed and analyzed in this paper to lower the complexity by avoiding the direct matrix inversion without performance degradation. The measure of the computational complexity in the channel estimators used in this paper is in terms of the floating-point operations (FLOPs) by which the polynomial-based estimators are shown to lead to a more reduced complexity compared to the conventional estimators used in massive MIMO. The performance evaluation of the designed estimators will consider different interference scenarios where comparison is performed with respect to conventional estimators. The results are analyzed analytically and are simulated in MATLAB then compared with the results achieved in previous research work for validation purposes.

Luke McShine is in the final year of his Bachelor’s Degree in Computer 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.

To reduce the spectral load on radio cell systems solid-state light-emitting diodes (LED) has been used as a potential means for a dual communications role, lighting and communication. The visible light transmitted from the LEDs can reduce use of mobile date without interfering with radio frequency transceivers. This visible light system (VLC) can send data through different modulation techniques to the intensity of the light. However, there are few mathematical and analysis framework for the different modulation techniques. Most of previous work used experimental results to compare the different modulation techniques for VLC. This research work provides detailed investigation of the different modulation techniques that can be used for a VLC system. The system bit error rate (BER), bandwidth and data rates will be compared for the different modulation techniques used. The transmitter of the VLC system can implement different modulation techniques hence it can be used in a wide variety of applications depending on the needs of data rate or the bandwidth. Three different modulation techniques will be compared, 4-ASK modulation with digital filtering, color shift keying (CSK), and pulse position modulation (PPM). The channel will be estimated as additive white Gaussian noise (AWGN). The results shows that the bit error rate results strongly depends on the type of modulation scheme used, the sampling rate, and the light intensity.

Ilyass Elataoui 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.

Visible light communication (VLC) systems uses commercial white LED devices can be used for both illumination and data transmission. The VLC system transmits digital signals wirelessly via the optical channel as light signals. Radio frequency (RF) communications using electromagnetic waves can create interference with medical instruments when used in biomedical and health applications. Hence visible light communication technology can be used safely for transmitting biomedical data. The white light emitted from light emitting diodes (LEDs) are used as carriers for the biomedical data such as ECG and PP signals. ON-OFF keying (OOK) modulation and other types of digital modulation techniques can be used to modulate the biomedical data into the visible light beam. The receiver circuit includes high speed photo detector and a demodulator to extract the data. Due to the lower bandwidth of ECG and PP signals, other medical information such the patient information can be multiplexed in the same system. Due to the wireless nature of the communication system, mobile health systems can be used in the healthcare sector. Their use will help in providing a solution to some of the problems in the health sector such as interference of RF waves with sensitive medical equipment, data transfer security, health-hazards associated with the exposure of radio frequency and microwaves level.

Nour El Sayed 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), and Engineers Australia.

Light-emitting diode (LED) devices are being used in a wide range of applications for both illumination and as a communication system. The use of LEDs as emitters for communications is evolving and it is likely that visible light communications (VLC) will provide extra data transmission capacity in the future wireless systems. At present devices used for illumination suffers from inter symbol interference (ISI). To reduce the inter symbol interference an adaptive FIR filter (an adaptive equalizer filter) is placed in the transmitter side and a raised cosine filter (RCC) is introduced in the receiver circuit. To find the optimal coefficients for the FIR filter, previous channel information and off-line adaptive algorithm is used. The proposed adaptive FIR was verified using Simulink and MATLAB. The FIR filter structure is designed with 4-tap for the simulation purpose. For compatibility and flexibility the channel impulse response is randomly selected. The bit error rate (BER) performance of the VLC system together with other measures such as data rate and distance were compared with the results obtained without the use of equalizer circuits. It clearly shows an advantage of using the pre-equalizer FIR filter in improving the system performance.

Afrah Ali is a final year Bachelors of Telecommunications Engineering student of University of Wollongong in Dubai. She has worked on the dimming control in Visible Light Communications as a part of her thesis research in her final year. Afrah has worked on the research and implementation of various other projects throughout her academic journey.

Increasing wireless data traffic is creating pressure on the conventional dwindling radio frequency spectrum. A new and reliable communication medium becomes a necessity. Visible Light Communication (VLC), a subset of optical wireless communications uses the visible light spectrum between 400 and 800 THz as a medium for communication. VLC utilizes the illumination of LED to establish a communication medium. The project focuses on achieving a successful VLC communication link at low intensities of light without affecting the speed, accuracy and efficiency of VLC. Conventional communication medium such as Radio Frequency (RF) spectrum uses complex valued Orthogonal Frequency Division Multiplexing (OFDM) signal which is not suitable for Intensity Modulation – Direct Detection (IM/DD). IM/DD is a modulation scheme where the RF signal modulates the intensity of an optical source. The LED driving signal in optical communication must be real and positive. The challenge lies in the development of a dimming control technique in VLC systems. Dimming control in VLC fixes the average intensity according to user requirements. The project will comprise of a reverse polarity optical RPO-OFDM modulator, a Forward Error Correction (FEC) encoder block, a dimming control circuit, an RPO-OFDM demodulator and a FEC decoder. Extensive research on various modulation schemes, coding and error correction techniques along with various driver circuit design for dimming control in VLC were thoroughly investigated to conclude the best reliable solution for dimming in VLC. The signal processing was validated through MATBLAB and the simulation was performed on SIMULINK.