ABSTRACT Photonically assisted millimeter‐wave (MMW) signal generation technology, compared to electronic solutions, can overcome modulation bandwidth limitations and is regarded as a key technology for future radio‐over‐fiber (RoF) communication systems. Therefore, we experimentally demonstrate a 1.2‐km wireless communication link based on a V‐band photonic‐assisted MMW 1 × 4 single‐input multiple‐output (SIMO) scheme. Utilizing constant modulus algorithm (CMA) and maximal ratio combining (MRC) techniques, we successfully transmit 4‐, 5‐, and 10‐Gbaud QPSK MMW signals in the 55‐GHz band and achieved a gain of up to 3.4 dB. The experimental results demonstrate that the MRC technique effectively enhances the received signal's signal‐to‐noise ratio (SNR) when combined with the SIMO system. Furthermore, in comparison with a single‐input single‐output system, the results show significant signal quality improvement after employing the CMA and MRC algorithms.
Zhang et al. (Wed,) studied this question.