ABSTRACT The generation and transmission of millimeter‐Wave (mmWave) are limited by complexity in the system, signal degradation due to nonlinearities and dispersion, and inefficiency in generating high‐frequency Radio Frequency (RF) signals such as 60 GHz. In addition, the demodulation of Quadrature Amplitude Modulation (QAM) is significantly affected over large distances of the fiber, primarily due to distortions in the channel. The conventional approach is based on a large number of RF and optical components, which raises the system cost, energy consumption, and less than optimal performance in dealing with nonlinearities and dispersion over long distances. In this context, this research introduces a new concept for transmitting OC‐192 (9.95328 Gbps) digital data and generating 60 GHz RF signals over Standard Single‐Mode Fiber (SSMF) by using Stimulated Brillouin Scattering (SBS). This system merges fewer components altogether, such as a 1550 nm Distributed Feedback (DFB) laser diode, a Mach–Zehnder Modulator (MZM), and the optical receiver together, which inherently reduces the overhead of hardware by reducing complexity across the board. A two‐stage Non‐Linear Equalizer (NLE) with a Carpet Weaver Convolutional Long Short‐Term Memory (CWCLSTM)‐based first stage extends the performance up to higher grades. The current equalizers available in the past are unable to compensate for high nonlinear distortions with better efficiency and adaptivity. The Carpet Weaver Optimization Algorithm (CWOA)‐based second stage is utilized for improving QAM demodulation accuracy with channel variation robustness. The proposed method outperforms other techniques by exhibiting a higher level of transmission accuracy, improved energy efficiency, less complex system structure, and higher adaptability to long‐distance fiber networks, hence a promising candidate for efficient mmWave communication.
S. et al. (Wed,) studied this question.