Combining envelope elimination and restoration and predistortion techniques for use in IEEE802.11g systems

被引：12

作者：

Chen, K. ^{[1
]}

Morris, K. A. ^{[1
]}

Beach, M. A. ^{[1
]}

机构：

[1] Univ Bristol, Commun Res Ctr, Bristol BS8 1UB, Avon, England

来源：

IET MICROWAVES ANTENNAS & PROPAGATION | 2007年 / 1卷 / 04期

关键词：

D O I：

10.1049/iet-map:20060192

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：

The envelope elimination and restoration (EE&R) transmitter inherently provides high-power efficiency for linear amplification, but it suffers out-of-band spectral re-growth from a number of distortion sources such as differential time delay between envelope and phase paths and nonlinear conversion and feed-through effect due to envelope variation of the radio frequency (RF) power amplifier. The combination of EE&R and predistortion techniques is discussed, which are used to compensate for the nonlinear distortions, and a modified RF phase signal is used to reduce the feed-through effect for an IEEE802.11 g application. This results in an EE&R transmitter with a performance of -37 dBc at the first adjacent channel power ratio (ACPR) and -47 dBc at the second ACPR and an average power added efficiency of 47.3%.

引用

页码：832 / 838

页数：7

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