RADAR SYSTEM AND METHOD FOR DETERMINING RANGE, RELATIVE VELOCITY AND BEARING OF AN OBJECT USING CONTINUOUS-WAVE AND CHIRP SIGNALS

摘要

Determining distance and relative speed includes a transmitter transmitting electromagnetic signals defined by a plurality of sections, a first section comprising a continuous-wave (CW) signal, a second section comprising a chirp electromagnetic signal, the chirp electromagnetic signal comprising a plurality of subsections. A detector detects reflected signals being the transmitted electromagnetic signals reflected from an object, and comprising a reflected CW signal and a reflected chirp signal. The detector detects the reflected signals by: (i) generating a plurality of samples of the reflected CW signal, and (ii) generating a plurality of samples of the reflected chirp signal. A processor determines a first set of phase differences among the plurality of samples of the reflected CW signal and a second set of phase differences among the plurality of samples of the reflected chirp signal, and processes the first and second sets of phase differences to determine the distance, relative speed and bearing.

主权项

1. A method for determining parameters of an object with respect to an observation point, comprising:
transmitting electromagnetic signals from the observation point, said electromagnetic signals being defined by a plurality of sections, a first section of the electromagnetic signals comprising a continuous-wave (CW) electromagnetic signal, a second section of the electromagnetic signals comprising a chirp electromagnetic signal, the chirp electromagnetic signal comprising a plurality of subsections divided in time; detecting reflected signals, the reflected signals being the transmitted electromagnetic signals reflected from the object, the reflected signals comprising a reflected CW signal being the CW electromagnetic signal reflected from the object and a reflected chirp signal being the chirp electromagnetic signal reflected from the object, said detecting reflected signals comprising: (i) generating a plurality of samples of the reflected CW signal, and (ii) generating a plurality of samples of the reflected chirp signal; determining a first set of phase differences among the plurality of samples of the reflected CW signal; determining a second set of phase differences among the plurality of samples of the reflected chirp signal; and processing the first and second sets of phase differences to determine the distance and relative speed of the object.