Title :
Broadband DSP based feedforward amplifier lineariser
Author :
Randall, R.G. ; McRory, J.G. ; Johnston, R.H.
Author_Institution :
TRLabs, Calgary, Alta., Canada
fDate :
11/7/2002 12:00:00 AM
Abstract :
The performance of the feedforward linearisation technique begins to degrade for signals with very wide bandwidths due to the non-ideal amplitude and phase frequency response of the components. By implementing part of the lineariser in a digital signal processor (DSP), a digital equaliser can be used to compensate for the nonideal behaviour and improve the cancellation in the first loop.
Keywords :
digital signal processing chips; equalisers; feedforward; frequency response; linearisation techniques; radiofrequency amplifiers; wideband amplifiers; bandwidth; broadband DSP based feedforward amplifier lineariser; digital equaliser; digital signal processor; hybrid lineariser signal cancellation loop performance; nonideal amplitude response; nonideal behaviour compensation; nonideal phase frequency response; wireless base station amplifiers;
Journal_Title :
Electronics Letters
DOI :
10.10491el.-20020971
