Benefits to processor load for quadrature baseband versus radio frequency demodulation algorithms
Date
2008-12
Authors
Ndovi, Lusungu
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University
Abstract
The continued advancement and improvement of software-defined radio technology has
been a key factor in furthering research into the implementation of most signal
processing algorithms at baseband. Traditionally, these algorithms have been carried
out at RF, but with the coming of SDR, there has been a need to shift the processing
down to baseband frequencies which are more compatible with the fast developing
software radio technology.
The study looks at selected demodulation algorithms and investigates the
possibility and benefits of carrying them out at QBB. The study ventures into the area
of beamforming, multipath compensation, Doppler shift compensation and matched
filter detection. The analysis is carried out using Matlab simulations at RF and QBB.
The results obtained are compared, not only to evaluate the possibility but also the
benefits in terms of the processing load. The results of the study showed that indeed,
carrying out the selected demodulation algorithms at QBB was not only possible, but
also resulted in an improvement in the processing speed brought about by the reduction
in the processing load.
Description
Thesis (MScEng (Electrical and Electronic Engineering))--Stellenbosch University, 2008.
Keywords
Quadrature, Software radio, Radio frequency modulation, Algorithms, Dissertations -- Electronic engineering, Theses -- Electronic engineering