Integrated Optical Wireless Network For Next Generation Wireless Systems

Integrated Optical Wireless Network For Next Generation Wireless Systems,Aditya Goel,R. K. Sethi

Integrated Optical Wireless Network For Next Generation Wireless Systems   (Citations: 1)
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The demand of bandwidth in mobile communication is growing exponentially day-by-day, as the numbers of users have been increased drastically over the span of last five years. The next generation wireless communication systems therefore need to be of higher standards, so as to support various Broadband wireless services- such as, Video conferencing, mobile videophones, high-speed Internet access etc. The existing wireless systems can hardly provide transmission capacity of the order of few Mbps. However, millimeter (mm) waves and optical fiber technology has the potential of providing data capacity of the order of Mbps and Tbps respectively. Therefore the requirements of broadband wireless system can be met through the integration of optical fiber and millimeter wave wireless systems. In this paper we suggest a modified millimeter wave wireless system using orthogonal frequency division multiplexing (OFDM) technique, integrated with optical fiber as a feeder network. Here we have investigated how well OFDM performs when transmitted over the wireless channel and multi mode optical fiber (MMOF) channel for various S/N values & fiber length respectively. Simulated performance shows that as the SNR is increased the signal gets less affected by noise; hence there will be fewer errors in decoding. For SNR greater than 12 dB, there is no significant difference observed in the received constellation. Therefore, it is not recommended to increase the SNR above 12 dB, as it results in unnecessary enhancement of the system complexity. When simulated results of Fiber are compared with AWGN channel, it is observed that the performance of MMOF link even for distance of 100 KM is better than that of the AWGN channel with SNR of 50 dB & above, due to the better transmission capabilities of Optical fiber.
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