Analysis of subcarrier intensity modulation-based optical wireless DF relaying over turbulence channels with path loss and pointing error impairments

作者：Aggarwal Mona^*; Garg Parul; Puri Parul

来源：IET Communications, 2014, 8(17): 3170-3178.

DOI：10.1049/iet-com.2014.0292

• intensity modulation
• optical communication
• relay networks (telecommunication)
• optical losses
• atmospheric turbulence
• fading channels
• gamma distribution
• protocols
• decode and forward communication
• probability
• method of moments
• error statistics
• phase shift keying
• Monte Carlo methods
• optical modulation
• optical wireless DF relaying
• path loss
• pointing error impairment
• subcarrier intensity-modulated relayed optical wireless communication system
• atmospheric turbulence channel

The authors consider a subcarrier intensity-modulated relayed optical wireless communication system under the combined influence of path loss, atmospheric turbulence and pointing error impairments. The turbulence-induced fading is modelled by independent but not necessarily identically distributed (i.n.i.d.) Gamma-Gamma fading statistics where the relaying protocol followed by the system is decode and forward (DF). First, the statistics of instantaneous signal-to-noise ratio at the destination is derived, followed by the novel and exact closed-form expression for outage probability of the system. Then using the moment generating function-based approach, the authors evaluate error performance of the system in terms of average symbol error rate (SER) for M-ary phase shift keying modulation schemes. Further, as a special case for M = 2, that is, binary phase shift keying modulation scheme, the exact closed-form expression of average SER is derived in terms of mathematically tractable Meijer's G-function and extended generalised bivariate Meijer's G-function. Finally, at the end of the paper, various numerical examples are included to demonstrate the effect of different system parameters on the performance of the system and are verified by Monte-Carlo simulations.

• 出版日期2014-11-27