Linearity considerations of W-CDMA front-ends for UMTS

Author

Pretl, H. ; Maurer, L. ; Schelmbauer, W. ; Weigel, R. ; Adler, B. ; Fenk, J.

Author_Institution

Inst. for Commun. & Inf. Eng., Linz Univ., Austria

Volume

1

fYear

2000

fDate

11-16 June 2000

Firstpage

433

Abstract

The signals used in UMTS have wide bandwidth and high crest factors. Circuit designers use sinusoids to design and simulate their building blocks. Formulas are presented relating the various distortion effects of the W-CDMA signals like adjacent channel leakage ratio (ACLR), cross modulation or intermodulation to well-known linearity measures like input intercept point of third-(IIP3) and second-order (IIP2) and compression point. Measurements of amplifiers with sinusoidal and broadband signals confirm the obtained results.

Keywords

adjacent channel interference; code division multiple access; intermodulation; mobile radio; UMTS; Universal Mobile Telecommunications System; W-CDMA signal; adjacent channel leakage ratio; cross-modulation; distortion; gain compression; linearity; low-noise amplifier; radio front-end; second-order intermodulation; third-order intermodulation; 3G mobile communication; Bandwidth; Broadband amplifiers; Circuit simulation; Distortion measurement; Intermodulation distortion; Linearity; Low-noise amplifiers; Multiaccess communication; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest. 2000 IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-7803-5687-X

Type

conf

DOI

10.1109/MWSYM.2000.861056

Filename

861056