In order to meet the ever increasing demand for larger transmission bandwidth, Wireless network based on radio-over-fiber technologies is a very beneficial solution. Various disadvantages of Analog Radio over Fiber link such as non-linearity, chromatic Dispersion can be mitigated by use of Digital Radio over Fiber link. A digitized RF-over-Fiber transmission scheme based on Bandpass Sampling theory is being introduced, Which provides mobility as well as large bandwidth. Comparison of Analog and digital Radio over Fiber is presented. Bit Error Rate and Signal to Noise Ratio for various input schemes such as BPSK,QPSK and 16 QAM are analyzed for Analog and Digital link and comparison is presented. Digital Radio Over Fiber link shows improved performance in terms of Bit Error Rate. Presence and absence of Optical Fiber Link is also analyzed and discussed.