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systems namely
WDM-RoF showcased timely. Use of WDM-ROF systems help to realize large bandwidth
of optical fiber, hence such systems preferred as very high data rate communication
networks for future. To achieve better value of spectral efficiency (SE) becomes a crucial
issue in WDM-RoF systems. SE is one of the important system designing parameters
which noticeably regulates the transmission capacity of such systems. Inappropriate
efforts for improving SE parameter value results in signal quality degradation and
ultimately signal impairments like XPM and crosstalk severely suppress system working
performance. Along with nonlinear and dispersive behavior of channel more number of
multiplexed channels, excessive amount of input signal power levels in channels and etc;
will create problems in terms of cross talks among channel signals and overall
degradation of signal. The crosstalk issue due to Raman-effect, occurring in the channel
signal is one of the main overwhelming factors in the performance of such systems.

High amount of atmospheric loss occurrence at air interface reduces the size of pico
cells in mobile communication systems. Frequency up conversion of carrier signal in
radio communication systems is one of the possible solutions to offer more bandwidth to
users. Such arrangements provide needed broadband backhaul from base stations for
broadband wireless access networks. In such systems it becomes difficult for end users
to deal with higher data rate processing because of bottleneck of access data at
receiving ends. Implementation of point-to-multipoint PON topology network at receiver
side is one of the best possible solutions to avoid such bottle necking problems at
receiving ends of such systems. In such systems, the received data distributed among
various active end users in economical manner. It is because; such PON arrangement
avoids the need for costly optic-electronic converters, number of optical transceivers and
feeder fiber for each user. Because of such arrangement, the overall cost of feeder fiber
and transceiver is divided among connected total N users. Power divider circuits used as
splitters at receiver side in the system. As per system design requirement splitters
implemented with different configurations like 1:2, 1:4 and etc; Due to the fact like such
arrangement implemented at receiver side without need of additional power requirement
anywhere, hence called PONs [63], [64]. PON is a group of network elements called ODN
that includes an OLT and multiple ONU. GPON is a modified PON technology which
supports higher data rate (~ 2.5 Gbps) service applications like HDTV, video on demand
and broadband mobile networking accompanied by good quality of services [1]. GPON is
a preferred type of PON technology used in high data rate applications working at high
frequency levels, standardized under the ITU-T G.984 recommendation. As reported in
literature ROF system based networks use analog modulation schemes in GPON
architecture. WDM technique used to distribute signal among many BSs. Use of passive

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