Linearity requirements for digital wireless communications

Author

Seng-Woon Chen

Author_Institution

Qualcomm Inc., San Diego, CA, USA

fYear

1997

fDate

12-15 Oct. 1997

Firstpage

29

Lastpage

32

Abstract

Linearity requirements, characterization, and simulation for digital wireless communications are discussed with emphasis on CDMA environments. A receiver´s dynamic range and sensitivity in the presence of jammers are determined mainly by the linearity of the front-end low noise amplifier and mixer. In the transmitter, the power amplifier is operated in the large signal mode such that the RF current and voltage excursions sweep over active as well as cut-off and saturation regions of the transistors and cause baseband waveform distortion and RF spectral spreading.

Keywords

digital radio; CDMA; RF front-end; baseband waveform distortion; digital wireless communication; dynamic range; jammer; large signal mode; linearity; low noise amplifier; mixer; power amplifier; receiver; sensitivity; spectral spreading; transmitter; Dynamic range; Jamming; Linearity; Low-noise amplifiers; Multiaccess communication; Radio frequency; Radiofrequency amplifiers; Transmitters; Wireless communication; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1997. Technical Digest 1997., 19th Annual

Conference_Location

Anaheim, CA, USA

ISSN

1064-7775

Print_ISBN

0-7803-4083-3

Type

conf

DOI

10.1109/GAAS.1997.628230

Filename

628230