Browsing by Author "Schonken, Willem Petrus Francois"
Now showing 1 - 1 of 1
Results Per Page
Sort Options
- ItemModelling and mitigation of specular multipath interference in a dual-frequency phase comparison FMCW radar system(Stellenbosch : Stellenbosch University, 2017-03) Schonken, Willem Petrus Francois; De Swardt, J. B.; Van der Merwe, Paul; Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.ENGLISH ABSTRACT: Digital signal processing technology has improved greatly over the last two decades. Increased processing power, cheaper memory and higher sampling rates have enabled the application of Frequency-Modulated Continuous Wave (FMCW) radar to a myriad of new areas. FMCW offers a number of advantages, such as continuous coverage and low peak output power, making it an attractive technology for industrial and automotive applications. Expansion into new application environments and the use of new signal processing algorithms have created a need for new multipath interference models. This study aims to fulfil that need through rigorous mathematical modelling of both the physical multipath environment and the two-dimensional Fast Fourier Transform (FFT) signal processing method, in the context of a Dual-Frequency Phase- Comparison FMCW radar sensor. It will be shown that specular reflections can have a profound effect on the amplitude and the phase of an FMCW radar’s base-band received signals. The multipath phase error interacts with the signal processing method, resulting in new and interesting effects. Furthermore, new mitigation methods will be proposed and critically evaluated by means of simulated and real-world measurements.