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- The receiver unit mainly consisted of the digital down converter, matched filter, differential demodulator and AFC module. 接收子系统包括下变频模块、匹配滤波器模块、差分解调模块、自动频率控制模块。 论文列出了部分模块的VHDL程序，还给出了各个模块的功能和时序仿真。
- In this paper, a new structure of Coordinate Convert Module in Digital Down Converter is presented which is based on CORDIC algorithm. 本文介绍了一种基于CORDIC算法的数字下变频器(DDC)中坐标变换模块的结构以及该结构的ASIC实现。
- The design of hardware module includes A/D converter, DDC (Digital Down Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part. 模块的硬件设计主要包括：A/D转换器、数字下变频器(DDC)以及DSP，详尽讨论了A/D器件AD6640和DDC器件AD6624的设计和应用；
- The Cascade integrator comb filter (CIC) has played an important role as an interpolating and low pass filter in the Digital Down Converter (DDC) of software radio. 在软件无线电的下变频模块中,级联梳状积分滤波器有着重要的应用,其主要作用是信号的抽取与低通滤波。
- The design of hardware module includes A/D converter, DDC (Digital Down Converter), DUC(Digital Up Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part. 收发信机硬件设计主要包括：A/D、D/A转换器、数字下变频器(DDC)、数字上变频器(DUC)以及DSP，论文详尽介绍了A/D器件AD6640、DDC器件AD6624和DSP器件TMS320C5410的设计和应用；
- This paper studies the design of digital down converter based on coordinate rotation digital computer (CORDIC) algorithm , the method can improve the efficiency of signal processing, reduce the design cost of hardware. 尝试了将CORDIC算法，应用于数字下变频的数控振荡器设计中，可提高运算效率，节省硬件资源，并对基于CORDIC算法的数字下变频，进行了仿真分析。 探讨了软件无线电中的多速率信号处理技术，重点分析软件无线电中的带通信号正交多相抽取结构；
- Data after AD sampling and digital down converter transfer to computer through PCI bus interface, while base-band signal processing may choose COTS DSP board or general high-performance PC in term of the need. AD采样、数字下变频后的数据通过PCI接口传入计算机，基带处理可视需要选用多种商用DSP处理板，或选用高性能PC机。
- Algorithm of software digital down converter 软件数字下变频器的算法
- Digital Down Converter Technique in Software Radio 软件无线电中的数字下变频技术
- On the base of these,the paper analyzes applications of digital down converting in the HSP50214B programmable downconverter. 在此基础上，提出了数字下变频技术在可编程数字下变频器HSP50214B中的应用方案。
- The common approach to implement DDC (Digital Down Conversion) on FPGA is based on a look-up table, which requires a huge volume of ROM to achieve high resolution. 摘要数字下变频的FPGA实现通常都是基于查表的方法，为了达到高精度要求，常常需要耗费大量的ROM资源去建立庞大的查找表。
- Digital Down Conerter (DDC) is a vital device of digital receiver and Numerically Controlled Osillator( NCO) also is a key device that influences the DDC s function. 数字下变频器(DDC)是数字接收机的重要部件,而数字振荡器(NCO)又是影响数字下变频性能的关健器件。
- Application of Digital Down Converter in Software Radio Receiver 数字下变频器在软件无线电接收机中的应用
- Design and Implementation of Digital Down Converter for Homenet 家庭网络中数字下变频器的设计与实现
- The radar digitalized receiver is based on Digital Down Conversion (DDC) technology, which is implemented on FPGA. 雷达数字化接收机部分是基于数字下变频(DDC)技术在FPGA上实现的算法研究及工程实现;
- Design of Digital Down Converter Based on CORDIC Algorithm 基于CORDIC算法的数字下变频器设计
- Moreover, this paper explores how to make use of DSP, CPLD, Digital down conversion (DDC) device, ect, to construct a SDR IF receiver which can carry out the demodulation function of AM signal if AM demodulationprogram is downloaded. 利用DSP、CPLD、数字下变频器等器件，构造了一个软件无线电中频接收系统，对该系统下载AM解调程序，它可以执行AM信号的解调功能。
- Polyphase Filters Quadrature Digital Down Converter Process Based on DSP 基于DSP的多相滤波正交数字下变频
- The converter has digital I/O capability. 这种转换器有数字输入/输出（I/O）能力。
- A Zoom- FFT Implementation Based onTechnology of Digital Down Convert 基于数字下变频技术实现的局部细化谱分析
