Direct conversion using lowpass sigma-delta modulation

Author

Eerola, Ville ; Lampinen, Harri ; Ritoniemi, Tapani ; Tenhunen, Hannu

Author_Institution

Signal Process. Lab., Tampere Univ. of Technol., Finland

Volume

6

fYear

1992

fDate

10-13 May 1992

Firstpage

2653

Abstract

A method for quadrature demodulation by subsampling with sigma-delta analog-to-digital converters is discussed, and a correlator receiver structure based on this method is described. The almost completely digital demodulator structure is based on second-order sampling and sigma-delta analog-to-digital converters. A theoretical performance analysis is presented, and a measurement system for the method is described. The proposed structure can be implemented on a single integrated circuit

Keywords

analogue-digital conversion; correlators; delta modulation; demodulation; digital communication systems; receivers; ADC; correlator receiver structure; digital demodulator; direct conversion; lowpass sigma-delta modulation; measurement system; performance analysis; quadrature demodulation; second-order sampling; single integrated circuit; subsampling; Analog-digital conversion; Band pass filters; Delta-sigma modulation; Demodulation; Digital filters; Digital modulation; Frequency conversion; Frequency domain analysis; Robustness; Sampling methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0593-0

Type

conf

DOI

10.1109/ISCAS.1992.230675

Filename

230675