Title :
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
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;
Conference_Titel :
New Circuits and Systems Conference (NEWCAS), 2013 IEEE 11th International
Conference_Location :
Paris
Print_ISBN :
978-1-4799-0618-5
DOI :
10.1109/NEWCAS.2013.6573638
