A transmitter architecture for nonconstant envelope modulation

被引：53

作者：

Berland, C ^{[1
]}

Hibon, I

Bercher, JF

Villegas, M

Belot, D

Pache, D

Le Goascoz, V

机构：

[1] ESYCOM, ESIEE, Lab Syst Commun, F-93162 Noisy Le Grand, France

[2] STMicroelectronics, F-38926 Crolles, France

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2006年 / 53卷 / 01期

关键词：

linearization techniques; pulsewidth modulation (PWM); sigma-delta (Sigma Delta) modulation; transceivers;

D O I：

10.1109/TCSII.2005.854594

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：

This paper presents a transmitter architecture which is less sensitive to power amplifier AM/AM and AM/PM conversions. Indeed, most radio communication standards employ non-constant envelope modulation such as in the 802.11 series. Owing to power amplifiers' nonlinearities, distortions on the modulations degrade the overall transmitter performance. As a consequence, linearization methods, such as envelope elimination and restoration, have to be employed. The architecture relies on the transformation of a nonconstant envelope modulation to a constant or switched one. This signal coding enables the efficient amplification of the signal without undergoing power amplifier distortions. The envelope variation is restored by bandpass filtering just after the power amplifier.

引用

页码：13 / 17

页数：5

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