Implementation of Digital Radio for Improved Synchronization using FPGA-based Platform

In this work, a narrow band digital radio is implemented using the FPGA-based platform. We concentrate on the synchronization part which is located at front of digital modem. In peer to peer communications, synchronization between radios is very important. If the synchronization fails, the receiving radio cannot receive any signals. Therefore, the synchronization part plays a crucial role for digital radio system. We propose the effective synchronizer implementation method to improve the performance of digital radio receiver. The measurement results prove that the proposed synchronizer implementation scheme achieves the possible synchronization frequency range around eight times more than conventional synchronization system. Also, it is shown that the implemented digital radio achieves approximately -112 dBm received sensitivity at target FER of 10-2.