WCDMA power amplifier requirements and efficiency optimization criteria

Author

Lilja, H. ; Mattila, H.

Author_Institution

Nokia Mobile Phones, Oulu, Finland

Volume

4

fYear

1999

fDate

13-19 June 1999

Firstpage

1843

Abstract

In this paper the WCDMA mobile transmitter requirements are studied. HPSK modulation method with multicode transmission capability has been adopted for the WCDMA system. Power amplifier requirements and efficiencies are studied with the measured class-AB HBT amplifier. In order to achieve long talk times for WCDMA terminal, it is essential that efficiency is optimized for medium power levels. However, it is also identified that power amplifier efficiency is important at the maximum output powers, because otherwise too much thermal heating occurs. This paper also proposes a procedure for WCDMA talk time standardization.

Keywords

channel capacity; code division multiple access; mobile radio; phase shift keying; radio transmitters; HPSK modulation method; WCDMA power amplifier; class-AB HBT amplifier; efficiencies; efficiency optimization criteria; maximum output powers; medium power levels; mobile transmitter requirements; multicode transmission capability; talk time standardization; Filters; Frequency; Heterojunction bipolar transistors; Multiaccess communication; Phase modulation; Power amplifiers; Power generation; Power measurement; Pulse shaping methods; Telecommunication standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.780331

Filename

780331