Design and Implementation of a COFDM Communication System with Zero Intermediate Frequency Architecture

Abstract

With the rapid growth of automobiles, subways and high-speed rails have brought great convenience to our lives, but they also posegreat challenges to existing communication systems. The mobile terminal moves at a high speed, causing the channel fading to exhibit rapid time-varying characteristics, bringing multipath effects and Doppler effects, causing problems such as “short transmission distance”, “long delay”, and “low resolution” in the communication system. In view of the above problems, the system adopts the 802.11a protocol standard in wireless communication as the theoretical basis of communication. Through theoretical simulation and software and hardware design, a COFDM wireless communication system based on zero-IF architecture is developed. The system can stably receive real-time video captured by the high-definition camera in the transmitter when the receiver moves at high speed.