Title :
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
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;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.861056
