Digital upconversion architecture for quadrature modulators

Author

Schaumont, P. ; Vernalde, S. ; Engels, M. ; Bolsens, I.

Author_Institution

IMEC/VSDM, Leuven, Belgium

fYear

1996

fDate

30 Oct-1 Nov 1996

Firstpage

315

Lastpage

324

Abstract

Traditionally, the digital implementation of modems is restricted to parts operating at the baseband frequency. At higher frequencies, roughly 30 MHz and beyond, analog technologies such as SAW filters provide a better power/performance figure. We show how this barrier can be broken by trading programmability for speed. Using a digital multirate filter structure that offers combined interpolation and frequency shifting, an area- and power efficient digital upconversion is achieved

Keywords

CMOS digital integrated circuits; delay circuits; digital filters; filtering theory; frequency convertors; interpolation; modems; quadrature amplitude modulation; surface acoustic wave filters; 30 MHz; CMOS standard cell; QAM; SAW filters; analog technologies; area efficient digital upconversion; baseband frequency; digital multirate filter structure; digital upconversion architecture; frequency shifting; interpolation; modems; power efficient digital upconversion; power/performance figure; programmability; quadrature modulators; speed; Bandwidth; Baseband; Digital modulation; Frequency; Image converters; Interpolation; Modems; OFDM modulation; Quadrature amplitude modulation; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Signal Processing, IX, 1996., [Workshop on]

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-3134-6

Type

conf

DOI

10.1109/VLSISP.1996.558364

Filename

558364