EFFICIENT DUTY-CYCLE MISMATCH COMPENSATION IN DIGITAL TRANSMITTER

被引：0

作者：

Li, Chunshu ^{[1
]}

Li, Min ^{[1
]}

Ingels, Mark ^{[1
]}

Verhelst, Marian ^{[1
]}

Zhang, Xiaoqiang ^{[1
]}

Van Driessche, Joris ^{[1
]}

Bourdoux, Andre ^{[1
]}

Van Der Perre, Liesbet ^{[1
]}

Pollin, Sofie ^{[1
]}

机构：

[1] IMEC, B-3001 Leuven, Belgium

来源：

2014 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP) | 2014年

关键词：

digital mixing; pre-distortion; duty cycle mismatch; digital intensive transmitter; IQ-IMBALANCE; DAC;

D O I：

暂无

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper presents an efficient mitigation approach for duty cycle mismatch of in-phase and quadrature upconversion signals in digital transmitters. This approach is supported by a mathematical analysis of the baseband equivalent impact of duty cycle mismatch. An efficient digital pre-distortion method is proposed to eliminate the distortion impact. Simulation results show that, for both 64-QAM and 256-QAM modulation schemes, the error-vector-magnitude can be improved from -25.1dB to less than -55dB, which leaves substantial design margin for other non-idealities distorting the transmitted signal.

引用

页数：5

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