Performance Analysis of the Hybrid MMW RF/FSO Transmission System

Physical Layer Security Performance Analysis of Hybrid FSO/RF Communication System

“…For the non-colluding eavesdropping mode, the average secrecy capacity can be calculated by inserting (7) and (12) in (25)…”

“…The overarching idea of the hybrid FSO/RF system is to transmit identical signals simultaneously over both links and combining the received signals using one diversity combining technique. This is logical because the two links exhibit compatible characteristics to atmospheric and weather effects; whereas the RF link is not prone to atmospheric turbulence or fog as the case of the FSO link, but rather to heavy rain [7]. It should be noted that the considered hybrid FSO/RF system in this paper significantly differs from the mixed dual-hop FSO-RF relay-based systems since the FSO link is only part of the mixed FSO-RF dual-hop relay-based system [8].…”

Relay-Assisted Technology in Optical Wireless Communications: A Survey

“…In hybrid OOWC/RF system, for OOWC link, Log-normal distributions, which is widely believed better under weak turbulence, Gamma-Gamma distributions, are generally regarded as optimal model in strong turbulence, Negative Exponential distributions, and Malaga distributions could be selected [72], [73]. For RF link, Rayleigh fading [21], Nakagami-м fading [74], η-μ distributions [72], Rician fading [75] and м distribution [76] could be selected. In many cases, in the actual wireless environment test, Nakagami-м distribution provides a better match with the actual test results than Rayleigh and Rician channels.…”

“…The merging methods are mainly divided into: maxima ratio combining (MRC), equal gain combining (EGC), selection combining or switching combining (SC). In [74], [83], [84], SC has lower complexity and cost than the other two methods. Using relay-assisted technology can further improve the capacity and availability of optical wireless [8].…”

Diversity aided millimeter‐wave/free space optical cooperative relaying systems

“…Moreover, the effect of interference on the performance of multiuser‐diversity‐driven mixed RF/FSO relaying systems has been analyzed by the authors of Upadhya et al 21,22 More specifically, authors of Upadhya et al 21 have analyzed the performance of mixed Nakagami‐ m RF/ α − μ ‐FSO relaying while in Upadhya et al, 22 Nakagami‐ m and double generalized Gamma models have been selected for analysis. As a matter of fact, in order to further increase the offered data rates, there have been a few studies on the performance of mixed mmWave/FSO relaying systems including Shakir 23 . In Shakir, 23 the author has derived the exact closed form expression for the mixed mmWave/FSO relaying system where the mmWave link has been modeled using the Nakagami‐ m fading distribution and FSO link as Gamma–Gamma‐distributed turbulence.…”