一种通用型低成本中频数字化方案的实现  

Realization of a Universal Low-cost IF Digitalization Scheme

作　　者：宋大凤[1] 姚元飞[1] 吴仡[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》2010年第6期59-62,共4页Telecommunication Engineering

摘　　要：根据超短波组合式电台低成本中频数字化的要求,提出了一种低成本的中频数字化方案,采用Xilnx公司的低成本FPGA XC3S4000和AD公司的上变频器AD9857以及模数转换器AD9235-40设计了中频数字化硬件平台,并在该平台上完成了AM、FM模拟信号和MSK数字信号的调制解调。模块级和系统级的测试表明,AM、FM的解调音频信纳比和MSK的误码率均满足系统设计要求。该平台具有很好的通用性,适用于中频频率低于40MHz的中频数字化设计。在该平台上只需进行软件更改就可以实现其它调制解调方案。According to the low-cost requirement of assembling V/UHF Radio, a low-cost IF digitalization scheme is proposed in this paper. The low-effictive FPGA-XC3S4000 produced by Xilnx, Inc., digital upconverter （DAC） AD9857 and DAC AD9235 -40 produced by AD, Inc., are used in this hard platform. AM and FM analog signal, MSK digital signal modulation and demodulation algorithms are accomplished based on this plat- form. The demodulated SINAD of AM and FM satisfies the demand of module and system, as well as the bit error ratio（BER） of MSK. The platform is provided with universality and can be used to realize other IF digitalization algorithms when IF frequency is blow 40 MHz. The other modulation and demodulation schemes can be realized on this platform only by modifying software.

关 键 词：软件无线电 超短波电台 中频数字化 低成本 调制 解调 

分 类 号：TN924[电子电信—通信与信息系统]