High-speed Optical Wireless Communication System Research Articles

Performance of coherent detection in optical wireless systems for high speed indoor communications

At a time of dramatically increasing bandwidth demand, the choice of the broadband technology adapted to future indoor applications, deserves serious consideration in the near term. Optical wireless technology goes beyond the capabilities of conventional radio communication systems and presents a realistic supplement to its counterpart. In this paper, a high-speed optical wireless communication system based on coherent reception technology is studied. Our analysis includes laser phase noise which, to the extent of our knowledge, has not been adequately addressed in the literature in the field of optical wireless. We also consider the influence of multipath-induced distortion. Our results indicate that coherent detection may significantly alleviate the power budget of line-of-sight and non-line-of-sight configurations. It can enable Gb/s wireless data transmission under moderate transmission powers consistent with eye safety regulations and the operational properties of optical transmitters typically found in the commercial marketplace.

4$\,\times\,$12.5 Gb/s WDM Optical Wireless Communication System for Indoor Applications

A novel high-speed optical wireless communication system incorporating wavelength division multiplexing technology for indoor personal area networking applications is proposed in this paper. Even with the simplest single wide field-of-view (45°) nonimaging receiver, bit rate as high as 4 × 12.5 Gb/s has been successfully demonstrated by experiments. It is shown that error-free reception (bit error rate <; 10-9) can be achieved over the entire beam footprint of about 1 m, so limited mobility can be provided to subscribers. In addition, a new localization system based on this optical wireless communication system has also been proposed and verified by experiments. When these two systems are incorporated together, high-speed optical wireless communication with mobility feature can be provided to users over the entire room.

High-Speed Optical Wireless Communication System for Indoor Applications

A novel high-speed optical wireless communication system for indoor personal area networking applications is proposed and studied. A proof-of-concept experiment at 12.5-Gb/s wireless transmission has been successfully demonstrated with limited mobility. When integrated with a WiFi-based localization system, high-speed optical wireless communication with a mobility feature can be achieved over the entire room. The performance trade-offs between the maximum beam footprint and overall bit rate have also been studied and quantified experimentally and the results show that error-free (BER<;10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-9</sup> ) reception can always be achieved for a wide range of bit rates from 1 to 12.5 Gb/s.