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This paper presents an improvement design of an Optical Code Division Multiple Access for Radio over Fiber (OCDMA-RoF) system. This improved system is divided into two main subsystems, Central Stations (CS) and Base Station (BS). Implement OCDMA code into RoF system promised a secure, cost-effective, and high-capacity mobile and multimedia wireless services. The analysis was made based on the relationship...
In this paper, we will focus on the modulation format used to produce the optical pulses, which are return to zero (RZ), and non-return to zero (NRZ). Bit error rate (BER) performance is assessed for OCDMA-RoF system. OCDMA-RoF system is viewed as a promising method for improving spectral efficiency and in the meantime diminish hardware equipment. The execution of RZ against NRZ is looked at through...
Research in optical communications is always determined by fundamentals for high information rates and enhanced spectral efficiency. Also, the development of highrequest modulation formats is included a higher bit rates per channel, which requirement expanded signal-to-noise ratio considerably and high power per channel. Then again, higher spectral efficiency also needs closely spaced channels to...
This paper presents five signal formats of return to zero (RZ), non-return to zero (NRZ), chirped return to zero (CRZ), soliton and duobinary in a transmission link. All the signals are compared in terms of its original and conversion to carrier suppressed. Long haul of 3880km is used in original transmitter while 770km used for conversion transmitter. The signal converter utilizes the semiconductor...
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