Mixer-free all digital quadrature demodulation

Author

Guirong, Guo ; Zhaowen, Zhuang ; Feixue, Wang

Author_Institution

Lab. of ATR, Nat. Univ. of Defense Technol., Changsha, China

Volume

2

fYear

1998

fDate

1998

Firstpage

1704

Abstract

All digital quadrature demodulation methods based on direct IF (intermediate frequency) sampling have advantages over conventional analog quadrature demodulation methods in matching accuracy between the inphase and quadrature channels. If we delicately select the sampling frequency and the sampling phase, the NCO (numerical-controlled oscillator) and mixers can be replaced by simple logic circuits. Because the ordinary NCO and mixers are eliminated, these types of demodulators are termed `mixer-free demodulators´. Various mixer-free all digital quadrature demodulation methods based on first-order sampling and second-order sampling are introduced and compared in this paper

Keywords

demodulation; demodulators; logic circuits; signal sampling; direct IF sampling; first-order sampling; inphase channels; intermediate frequency sampling; logic circuits; mixer-free all digital quadrature demodulation; quadrature channels; sampling frequency; sampling phase; second-order sampling; Bandwidth; Demodulation; Digital filters; Frequency; Laboratories; Logic circuits; Mixers; Oscillators; Sampling methods; Signal sampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-4325-5

Type

conf

DOI

10.1109/ICOSP.1998.770959

Filename

770959