Design And Realization Of The IF Digital Receiver Based FPGA

In order to meet the development needs of software-defined radio,radar,the industry put forward the "digital radar","software radar"concept,due to the restriction of technical it is unable to achieve this goal in the short term,but the digital technology in radar is the widely used is a trend.Digital receiver is the key technologies for radar digital transformation with stable and flexible benefits.This study focused on the IF digital receiver combining the theoretical of software radio,which purpose is to get the phase difference of two IF signal,and ultimately its function can be implemented by hardware.This paper describes a dual-channel IF digital receiver design and hardware implementation.First,given the system design plan to introduce the chip selection and design of the circuit;Building the module based on orthogonal transformation theory of multi-phase filtering and CORDIC IP core and the filters based on the pulse-width matched have a better filtering effect.Then to calculate the phase difference of two IF signal and send them to the next to system.Finally experimental data and test results show that the completion of system technical commend well.In this Paper all operations of control and calculation are performed in a high-performance FPGA, and all software modules and software timing are optimized carefully to make the system work with real-time, high efficiency and low power consumption advantages.