A QPSK direct-conversion receiver for wireless communications

被引：3

作者：

Karmakar, NC ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Div Commun Engn, Singapore 639798, Singapore

来源：

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING | 2005年 / 15卷 / 01期

关键词：

anti-parallel diode pair; mixer; direct conversion receiver; QPSK receiver; RF front ends;

D O I：

10.1002/mmce.20049

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The design and development of a compact receiver front-end comprised of two even-harmonic direct-conversion mixers, a quadrature hybrid coupler, two bandpass filters, two lowpass filters and a Wilkinson power divider are presented. The subharmonic mixer utilizes a well-matched antiparallel diode (APD) pair. The design helps improve the 2(nd)-order intermodulation performance (IM2) due to the suppression of the even-order mixing products and LO noises. The receiver front-end is able to generate in-phase I and quadrature-phase Q baseband outputs at 35 MHz. The detailed design of radio frequency (RF) components at the C-band and a quadrature intermediate frequency (IF) carrier signal in the I and Q waveforms are demonstrated successfully with a 9-dB effective IF conversion loss at 10-dBm LO power at the C-band. (C) 2004 Wiley Periodicals, Inc.

引用

页码：31 / 43

页数：13