A Circuit Technique for Blocker-Induced Modulated Spur Cancellation in 4G LTE Carrier Aggregation Transceivers

被引:8
|
作者
Sadjina, Silvester [2 ]
Krzysztof, Dufrene [2 ]
Kanumalli, Ram Sunil [2 ]
Huemer, Mario [1 ]
Pretl, Harald [1 ,2 ]
机构
[1] Johannes Kepler Univ Linz, Linz, Austria
[2] DMCE GmbH & Co KG, Linz, Austria
来源
2017 25TH AUSTROCHIP WORKSHOP ON MICROELECTRONICS (AUSTROCHIP) | 2017年
关键词
Carrier aggregation; cellular hand-sets; full duplex; modulated spur; modulated blocker; TX leakage; mixed-signal cancellation;
D O I
10.1109/Austrochip.2017.21
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
In this paper, we propose a novel mixed-signal cancellation circuit for LTE carrier aggregation receivers targeting modulated spur interference. This circuit senses interference via an auxiliary analog path, and generates a reference signal for the adaptive digital cancellation. To evaluate the performance of the proposed technique, a demonstrator, realized in 28nm LP CMOS, is shown with a cancellation of over 20 dB and low impact on the main path while consuming 14.3mW. Measurement results show that the receiver's noise figure is restored to a value within 0.1 dB of the reference value.
引用
收藏
页码:23 / 28
页数:6
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