Title :
Novel Waveform Generation Principle for short-range FMCW-Radars
Author_Institution :
EADS DE, Ulm
Abstract :
The FMCW-radar-principle is widely used for short range radar systems. The basic idea for FMCW-radars is to generate a linear frequency ramp as transmit signal. There are too widely used principles for range-Doppler-processing: generation of ramps with different slopes and generation of a sequence of short ramps processed by a two-dimensional FFT. The developed ramp generation sequence also applies two-dimensional Fourier transforms, but allows to reduce the baseband bandwidth. The principle can be also regarded as an extension of a frequency stepped-CW-radar with intertwined ramps. In the following the method is derived for systems with and without I/Q-demodulator and first measurement results on a 24 GHz-system are presented. The waveform generator has been implemented on a FPGA.
Keywords :
Doppler radar; Fourier transforms; demodulators; field programmable gate arrays; ramp generators; waveform generators; FMCW radars; FPGA; I/Q-demodulator; ramp generation sequence; range-Doppler-processing; short range radar systems; two-dimensional Fourier transforms; waveform generation principle; Bandwidth; Calibration; Delay; Field programmable gate arrays; Frequency; Power capacitors; Random access memory; Sampling methods; Signal generators; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
DOI :
10.1109/GEMIC.2009.4815876
