Accurate UMTS power transition with power alignment loop between two different modulation modes for polar transmitter

Author

Nakamura, Maki ; Urushihara, Tomoya ; Do, Gary ; Igarashi, Masatoshi ; Ishida, Kaoru

Author_Institution

Commun. Core Devices Dev. Center, Panasonic Corp., Yokohama, Japan

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

Generally low power region is very dominant for current consumption on UMTS handsets. However, a polar modulation architecture has a little bit lager current consumption in this region. So, we propose polar/quadrature modulation architecture with a fast-feedback power control technique “power alignment loop (PAL)”. The PAL can realize accurate UMTS power transition over the two different modulation modes. Measurement results shows that the power accuracy between the two modes can satisfy the 3GPP standard within 25 μs from the slot boundary. The average current consumption of the transmitter is 128 mA at the battery.

Keywords

3G mobile communication; feedback; modulation; power control; radio transmitters; telecommunication control; 3GPP standard; UMTS power transition; current 128 mA; current consumption; fast-feedback power control technique; modulation modes; polar modulation architecture; polar transmitter; polar-quadrature modulation architecture; power alignment loop; time 25 mus; 3G mobile communication; Accuracy; Modulation; Power generation; Radio transmitters; Radiofrequency integrated circuits; UMTS; cellular; polar modulation transmitter; power control; quadrature modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972755

Filename

5972755