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This paper describes a waveform generator for 77 GHz automotive radar systems based on a fractional N-Phase Locked Loop (N-PLL) with a third-order delta-sigma (ΔΣ). A control unit is used to control the ΔΣ modulator to vary the output frequency. The behaviour of the generation is simulated in Simulink and ten output frequencies with a slight difference are generated. The proposed generator has the...
The vehicle radars should be able to detect all stationary or moving objects inside the observation area with short measurement time, high range and velocity resolution, and cost efficiency. To achieve this, an improved model called Double-SFPW based on SFPW is described, it transmits two stepped frequency pulses with a frequency shift and a time difference, its performance is better than conventional...
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