Palak Ravi Gupta

Bio: Palak Ravi Gupta is an academic researcher from VIT University. The author has contributed to research in topics: Relay & Relay channel. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Cooperative Wireless Optical communication system using IWO based optimal relay placement

Abstract: Wireless Optical communication [WOC] is improved using relay assisted transmission which exploits multiple shorter hops that gives a better performance gain. Relay assisted transmission is used as a mitigation tool in combating atmospheric turbulence occurring in the communication channels. The prime aim is to minimize the outage probability and optimize relay locations for parallel and serial FSO relaying. In this paper we aim to address the major limiting factor for links measuring more than a kilometer; the error rate performances is dismal and therefore relay assisted transmission is employed to combat this shortcoming. The main focus of this study is on considering the channel model, in which turbulence-induced fading and path-loss are considered. The locations of the relay are evaluated using different algorithms and then compared to find out the best optimized result obtained from the simulation results.

Performance of Cooperative System Based on LDPC Codes in Wireless Optical Communication

Abstract: This paper proposes the use of the technique of cooperative systems in wireless optical communication. Several obstacles can degrade the performance of information transmission in wireless optical links. These include atmospheric turbulence in communication links greater than 1 km, the rocking of buildings, wireless optical channel fading and flickering. Several studies have shown that the use of cooperative systems in this communication technique has better performance compared to conventional systems. To improve the performance of the transmission in the optical links we propose to place a DF (Decode and Forward) relay between the transmitter and the receiver, using the LDPC (Low-density Parity-check) codes at the relay level. Another innovation of this article is the introduction of the series relays to connect two very distant sites by also using LDPC at the level of each relay. Our method achieves a remarkable efficiency in terms of BER (Bit Error Rate) compared to some previous work.