Abstract
In this study, we examined the effect of phase noise on the optical millimeter-wave (mm-wave) signal in a dense wavelength division multiplexing radio-over-fiber (DWDM-RoF) system. A single modulator was used to generate the optical mm-wave signal in the DWDM-RoF system. This paper addresses the impact of phase noise, which results from phase imbalance, on the optical mm-wave signal. To lower the effect of phase noise on the optical mm-wave signal, the phase imbalance should be controlled. The phase imbalance can be controlled and decreased by adjusting the phase at the phase shift (PS). The system performance was analyzed using various parameters such as bit error rate (BER), signal-to-noise ratio (SNR), optical signal to noise ratio (OSNR), and error vector magnitude (EVM). From the results, we found the phase imbalance affected the optical mm-wave signal due to the imbalanced splitting of the signal intensity at the MZM. The phase imbalance impacts the phase noise, which impacts the optical mm-wave signal. The phase noise could be decreased by controlling the phase imbalance at the phase of 5π/12. The best results at the phase of 5π/12 were collected for phase noise at 0.02 degrees.
Highlights
During the past few years, the communication industry has experienced rapid expansion in the number of worldwide users and an increase in the speed of transmission data [1]
We examined the effect of phase noise on the mm-wave signal
The Dense wavelength division multiplexing (DWDM)-RoF architecture was evaluated under various phases to show the performance of the mm-wave signal
Summary
During the past few years, the communication industry has experienced rapid expansion in the number of worldwide users and an increase in the speed of transmission data [1] It will be necessary for future access networks to merge both photonic technology and radio-over-fiber (RoF) technology to provide high-flexibility and sufficient systems to the end-user. The 5G traffic requirements will necessitate improvements to the design of radio access networks (RANs), which depend on unused ranges of frequencies such as the mm-wave range Different applications, such as complementing terrestrial RANs with unmanned arial vehicles (UAVs), can be cost-effective and flexible strategies with the 5G radio access networks, as reported in [2]. Several researchers are focusing on mm-wave generation using photonic techniques [7,8]
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