Design of QPSK Modem Based on FPGA

摘要

Quadrature Phase Shift Keying as a efficient modulation mode to be used in wireless communication. it is significant to study its implement. This paper presents a method to design QPSK modulator and demodulator, which use field programmable gate array. We will analysis the principle of QPSK modem and will give the design method, display the block diagram of the system in this paper and discuss its feasibility. The whole system is divided into several small models. Because space is limited, we can only introduce some key modules. Such as carrier recover and bit synchronization.