Six-port direct digital receiver (SPDR) and standard direct receiver (SDR) results for QPSK modulation at high speeds

Author

Schiel, J.-C. ; Tatu, S.O. ; Ke Wu ; Bosisio, G.

Author_Institution

Centre de Recherche Avancee en Micro-ondes et Electronique Spatiale, Ecole Polytech. de Montreal, Que., Canada

Volume

2

fYear

2002

fDate

2-7 June 2002

Firstpage

931

Abstract

Comparative measurements on two direct down-conversion receivers are presented to investigate the performance of a six-port digital receiver (SPDR) with a standard direct receiver (SDR) using quadrature zero-IF mixers. The six-port prototype is fabricated in MHMIC format for a carrier frequency of 2.45GHz with QPSK digital modulation suitable for wireless local loop such as WLAN or MMDS systems. BER measurements on both receivers are presented in the presence of noise, adjacent channel and cochannel interference, local oscillator phase shift and sensitivity for 40 Mb/s data rate. MMIC design scheme of the six-port digital receiver can provide a robust, simple, low-cost design platform for use in mass-market communication systems for present and future multimedia broadband applications.

Keywords

UHF integrated circuits; adjacent channel interference; broadband networks; digital radio; microwave integrated circuits; multimedia communication; multiport networks; quadrature phase shift keying; wireless LAN; 2.45 GHz; 40 Mbit/s; MHMIC format; MMDS; QPSK modulation; WLAN; adjacent channel; carrier frequency; cochannel interference; local oscillator phase shift; low-cost design platform; mass-market communication systems; multimedia broadband applications; quadrature zero-IF mixers; six-port direct digital receiver; standard direct receiver; wireless local loop; Bit error rate; Digital modulation; Frequency; Measurement standards; Noise measurement; Phase measurement; Prototypes; Quadrature phase shift keying; Wireless LAN; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1011782

Filename

1011782