Analysis and Design of Small-Signal Polar Transmitters for Cellular Applications

被引：17

作者：

Darabi, Hooman ^{[1
]}

Jensen, Henrik ^{[1
]}

Zolfaghari, Alireza ^{[1
]}

机构：

[1] Broadcom Corp, Irvine, CA 92618 USA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2011年 / 46卷 / 06期

关键词：

GSM; GMSK; EDGE; 8PSK; WCDMA; QPSK; direct-conversion; phased locked loop; direct modulation; polar; small-signal polar; modulation spectrum; phase error; EVM; CMOS POWER-AMPLIFIER;

D O I：

10.1109/JSSC.2011.2118470

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 cellular applications, open-loop small-signal polar transmitters offer several advantages such as low power consumption and small silicon area. However, due to their complexity, circuit imperfections can severely affect performance, potentially rendering them impractical to meet the challenging cellular transmitter requirements. In this paper a detailed analysis of the direct-modulated and small-signal polar transmitters for GSM/EDGE/WCMA applications are provided followed by some case studies. Several key non-idealities will be discussed and circuit level as well as architectural remedies for each will be presented. A prototype EDGE transmitter fabricated in 65 nm CMOS with an 8PSK +/- 400 kHz modulation spectrum of -64/63 dBc for high/low bands, and an RMS EVM of 2.5/2.0% will be discussed.

引用

页码：1237 / 1249

页数：13

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