【摘要】 介绍了基于FPGA的数控振荡器(NCO)的实现方案,基于FPGA的FIR滤波器的实现方案,MVR CORDIC算法的基本原理;给出了基于MVR CORDIC算法的DDC设计,给出了基于FPGA的DDC仿真结果并对其性能进行了分析,结果表明DDC能够高速实时稳定可靠的工作,已应用于S波段遥测中频数字化接收机系统中。更多还原

【Abstract】 The realization methods of NCO(numerically controlled oscillator) and FIR filter based on FPGA are introduced.And the design of DDC(digital down converter) based on MVR CORDIC algorithm and the design and realization of DDC based on FPGA are given.The simulation results of DDC are given.And then the performance of DDC is analyzed.The test results show that the DDC can work reliably and stably with high speed in real time.The DDC proposed is already applied in S-band telemetry intermediate frequency digital receiver system.更多还原