WCDMA uplink modulation scheme evolution and transmitter implementation

Author

Lilja, Harri ; Mattila, Heikki

Author_Institution

Nokia Mobile Phones, Oulu, Finland

Volume

2

fYear

1999

fDate

1999

Firstpage

899

Abstract

The evolution of a WCDMA uplink modulation scheme is presented. Modulation schemes are analyzed from the power amplifier implementation point of view by comparing the RF envelopes of various modulation schemes. The power amplifier linearity requirements of different modulation schemes are compared using a measured class AB power amplifier. One of the challenges in WCDMA is the implementation of the transmitter for a WCDMA terminal supporting both speech and high-speed data. This paper proposes a transmitter architecture for optimizing the current consumption of the WCDMA terminal in both modes

Keywords

broadband networks; code division multiple access; data communication; land mobile radio; modulation; power amplifiers; radio links; radio transmitters; radiofrequency amplifiers; voice communication; EMC performance; WCDMA terminal; WCDMA uplink modulation; current consumption optimisation; high-speed data; measured class AB power amplifier; power amplifier implementation; power amplifier linearity requirements; speech communication; third generation mobile systems; transmitter architecture; transmitter implementation; Circuits; Europe; Multiaccess communication; Power amplifiers; Power generation; Quadrature phase shift keying; Radiofrequency amplifiers; Speech; Standards development; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.798460

Filename

798460