基于AD9735的高性能全数字调制器设计与实现  

Design and Implementation of a High Performance All-digital Modulator Based on AD9735

作　　者：张昌菊[1] 吴朝慧[1] 邓宏伟[1] 邓强[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2009年第1期81-84,共4页Telecommunication Engineering

摘　　要：介绍了全数字调制器的原理,利用高速数模转换器AD9735、XilinxFPGA和低压差分频率合成器等逻辑器件实现了直接70MHz中频全数字调制器。该调制器通过在线可编程接口设置不同参数,可适用于100bit/s～4Mbit/s符号速率范围内的多速率数据传输,同时支持信道编码,如卷积编码、RS编码和交织等;调制方式可选,如BPSK、QPSK、UQPSK及单载波模式;扩频和编码均可控,是一种通用的高性能全数字调制器。The principle of all- digital modulator is introduced. A direct intermediate frequency（IF） alldigital modulator is implemented by logic elements, such as high -speed digital- to -analog converter （DAC） AD9735, Xilinx FPGA and low- voltage differential signal（LVDS） frequency synthesizer. Differ- ent parameters can be set in the modulator by online programmable interface. It supports multi - rate data transmission in the range of 100bit/s - 4Mbit/s symbol rate. Channel coding is also included in the modulator. Convolutional code, RS code and interleaver are available. The modulation modes are optional, including BPSK, QPSK, UQPSK and single carrier, as well as spread spectrum and coding mode. So, it is a general and high performance all -digital modulator.

关 键 词：数字通信系统 全数字调制器 直接中频 信道编码 

分 类 号：TN761[电子电信—电路与系统]