A microwave communication link with self-heterodyne direct down conversion and system predistortion

被引：13

作者：

Park, J ^{[1
]}

Wang, YX ^{[1
]}

Itoh, T ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2002年 / 50卷 / 12期

关键词：

direct downconversion; predistortion; self-heterodyne;

D O I：

10.1109/TMTT.2002.805134

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：

A novel design of a microwave communications link operating at 5.8 GHz; is presented based on self-heterodyne direct downconversion (SHDDC) and system predistortion. Utilizing the SHDDC scheme eliminates the need of-any local oscillators at the receive ends and minimizes spectrum usage; however, the transmitter power efficiency is low, and there exist high mixer intermodulation levels in the receiver. To overcome these drawbacks, a system predistortion approach is proposed. A two-tone measurement is performed to validate the idea. It shows 12.67 dBc of overall improvement in the signal-to-intermodulation ratio by applying a fourth-order predistortion technique. Further, successful transmission of a digitally modulated signal is also demonstrated.

引用

页码：3059 / 3063

页数：5