32-QAM All-Digital RF Signal Generator Based on a Homodyne Sigma-Delta Modulation Scheme

被引:0
|
作者
Sotiriadis, Paul Peter [1 ]
Basetas, Charis [1 ]
Temenos, Nikos [2 ]
机构
[1] Natl Tech Univ Athens, Dept Elect & Comp Engn, Athens, Greece
[2] Univ Athens, Dept Informat & Telecommun, Athens, Greece
关键词
Sigma-delta; noise shaping; single-bit quantization; multiplier-less; all-digital; homodyne; synthesizer; RF; QAM;
D O I
暂无
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
An all-digital sigma-delta modulator (SDM) based RF synthesizer is presented. A multiplier-less architecture for the implementation of the band-pass SDM loop filter is proposed. Furthermore, this architecture enables the adjustment of the loop filter central frequency by exploiting homodyne up-and down-conversion. The RF synthesizer is comprised of a direct digital synthesizer (DDS) and the proposed multiplier-less single-bit band-pass SDM. Due to the simplicity of the synthesizer building blocks very high generated frequencies are possible. Modualtion is easily incorporated and as a test case its performance in a 32-QAM modulation scheme is presented.
引用
收藏
页码:603 / 604
页数:2
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