EVM performance of a radio-over-fiber system for multiband wireless signal transmission

This paper studies the transmission performance of a radio-over-fiber (ROF) system which is utilized to transmit multiband wireless signals at cellular bands of 870 MHz, 935 MHz, 1.96 GHz and ISM band at 2.4 GHz for wireless local area network. At the receiver, GSM, CDMA2000, WCDMA and WLAN signals are detected and error vector magnitude (EVM) measurement is carried out to evaluate the transmission performance of the ROF system for these four wireless signals by Agilent VSA89600. The validation results reveal that the modulation technique of the signal is crucial in determining the EVM performance. Among these wireless signals, the GSM signal at 935.2 MHz is the most susceptible to distortion, while the WLAN signal at 2.4 GHz is the most resilient.