Envelope Delta-Sigma Modulation with Adaptive Dither for Direct-Conversion Transmitter and Switch-Mode Power Amplifier

被引：0
|
作者：
Xiao, Lu [1 ]
Abbasian, Sadegh [1 ]
Kumar, Rohit [2 ]
Yogi, Shanu [2 ]
Johnson, Thomas [1 ]
机构：
[1] Univ British Columbia, Sch Engn, Kelowna, BC V1V 1V7, Canada
[2] Indian Inst Technol, Dept Elect Engn, Kanpur 208016, Uttar Pradesh, India
来源：
2016 IEEE 17TH ANNUAL WIRELESS AND MICROWAVE TECHNOLOGY CONFERENCE (WAMICON) | 2016年
关键词：
switch-mode power amplifier; envelope delta-sigma modulation; adaptive dither;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new encoder for radio frequency switch-mode power amplifiers is described. The encoder is designed for a transmitter architecture that uses envelope delta-sigma modulation (ESDM) and a direct conversion transmitter architecture. The ESDM is modified to include a dither signal that shapes the out-of-band spectrum while simultaneously maintaining good SNDR. The out-of-band dither can also be used to improve the power efficiency of the switch-mode power amplifier by rectifying the dither signal to recycle power. The encoder is designed to be implemented in a FPGA. Simulation and experimental results with an LTE modulated carrier are shown to demonstrate the concept.
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页数：4
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