Study and analysis of a new implementation of a mixed-signal cartesian feedback for a low power zero-IF WCDMA transmitter

Author

Aulery, A. ; Dallet, Dominique ; Le Gal, Bertrand ; Deltimple, Nathalie ; Belot, Didier ; Kerherve, Eric

Author_Institution

Lab. IMS, Univ. de Bordeaux, Talence, France

fYear

2013

fDate

16-19 June 2013

Firstpage

1

Lastpage

4

Abstract

This paper, proposes a new architecture to reduce the silicon area of the Cartesian feedback (CFB) used to linearize a power amplifier in WCDMA communication standard. The first stage of the previous version consists of two CORDIC structures in vector mode for the phase computation following by a subtractor. Here, we propose to merge these two CORDIC structures to obtain directly the phase difference between the feedback and the direct paths. This approach allows reducing the silicon area as well as the power consumption.

Keywords

code division multiple access; digital arithmetic; linearisation techniques; low-power electronics; power amplifiers; radio transmitters; CORDIC structure; WCDMA communication standard; low power zero-IF WCDMA transmitter; mixed-signal cartesian feedback; phase computation; power amplifier linearization; power consumption; silicon area reduction; subtractor; vector mode; Computer architecture; Libraries; Multiaccess communication; Power demand; Silicon; Spread spectrum communication; Vectors; CORDIC; PA linearization; digital design;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2013 IEEE 11th International

Conference_Location

Paris

Print_ISBN

978-1-4799-0618-5

Type

conf

DOI

10.1109/NEWCAS.2013.6573638

Filename

6573638