Statistical analysis of second-order intermodulation distortion in WCDMA direct conversion receivers

Author

Bevilacqua, Andrea ; Svelto, Francesco

Author_Institution

Dipt. di Ingegneria dell´´Informazione, Univ. di Padova, Italy

Volume

52

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

117

Lastpage

121

Abstract

Nonlinear spectral analysis is exploited in this brief to investigate the second-order intermodulation distortion in direct conversion receivers (DCRs) for wideband code division multiple access systems. The emphasis is on the accurate modeling of the interferer, and on the derivation of the second-order intermodulation distortion spectra. Depending on the number of code multiplexed channels, the second-order intermodulation distortion power produced in the receiver can be significantly different. It varies by 6.5 dB between two boundary cases: multichannel versus single-channel signal. The developed analysis is verified by means of experiments carried out on a 0.18-μm CMOS DCR realized for the universal mobile telecommunications system standard.

Keywords

code division multiple access; intermodulation distortion; receivers; spectral analysis; statistical analysis; telecommunication standards; 0.18 micron; CMOS DCR; WCDMA; accurate modeling; code division multi-access; code multiplexed channels; direct conversion receivers; homodyne detection; multichannel signal; nonlinear spectral analysis; second-order intermodulation distortion; single-channel signal; statistical analysis; stochastic processes; universal mobile telecommunications system standard; wideband code division multiple access systems; 3G mobile communication; Intermodulation distortion; Multiaccess communication; Power system modeling; Quadrature phase shift keying; Semiconductor device modeling; Spectral analysis; Statistical analysis; Stochastic processes; Wideband; Code division multiaccess; homodyne detection; intermodulation distortion; spectral analysis; stochastic processes;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2004.842044

Filename

1406199