quotation:		[Copy]
		[Copy]

This Paper:Browse 4079 Download 3087
一种通用型低成本中频数字化方案的实现
宋大凤,姚元飞,吴仡
0 Fontlarge +\|Default\|Small
(中国西南电子技术研究所，成都 610036)

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AD9 235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40 MHz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。

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

DOI：

基金项目:

Realization of a Universal Low cost IF Digitalization Scheme

SONG Da-feng,YAO Yuan-fei,WU Yi

(Southwest China Institute of Electronic Technology，Chengdu 610036，China)

Abstract:

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 pr oduced by AD,Inc., are used in this hard platform. AM and FM analog signal,MSK d i gital signal modulation and demodulation algorithms are accomplished based on th i s platform. 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 provid ed with universality and can be used to realize other IF digitalization algorith ms when IF frequency is blow 40 MHz. The other modulation and demodulation s chemes can be realized on this platform only by modifying software.

Key words: software defined radio(SDR) VHF/UHF radio IF digitalization low cost modulation demodulation