Title :
Calibration scheme for LINC transmitter
Author :
Zhang, X. ; Larson, L.E. ; Asbeck, P.M.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
A simple calibration scheme for correction of the path imbalance in a LINC transmitter is presented. By properly exchanging two LINC vector components and controlling a downconversion loop. The gain and phase imbalance are characterised by the baseband DSP/SCS. The error effects of the imbalance are compensated by introducing a pre-distortion term. Simulation results demonstrate that this scheme is sufficient to suppress the out-of-band spectrum for wireless communications
Keywords :
calibration; mobile communication; optical links; optical transmitters; LINC transmitter; LINC vector components; baseband DSP/SCS; calibration scheme; downconversion loop; linear amplification with nonlinear components; mobile communication; out-of-band spectrum; path imbalanc; phase imbalance; pre-distortion term; wireless communications;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010209
