Operation of multiple frequency CW radar involves transmitting signals at different frequencies and measuring the Doppler shift for each frequency. This technique helps distinguish targets at different speeds and can improve the accuracy of speed measurements.
CW radar works by emitting a continuous signal at a constant frequency and detecting changes in the frequency of the reflected signal caused by the Doppler effect. These frequency changes are used to determine the speed of moving objects, because radar does not measure signal delay to determine distance.
Radar operations include transmitting an electromagnetic signal, receiving the reflected signal after it bounces off an object, and processing the received signal to determine various characteristics of the object, such as distance, speed, and direction.
The beat frequency in FMCW radar is the difference between the transmitted and received frequencies. This difference in frequency, which varies with distance from the target, is used to determine the target range. The beat frequency is analyzed to calculate the delay and distance to the radar object.
The operating principle of FMCW radar involves a continuous variation of the frequency of the transmitted signal in a linear or non-linear manner. By comparing the frequency of the received signal with the transmitted frequency, the FMCW radar can measure both the distance and speed of the target. The difference in frequency between the transmitted and received signals, known as the beat frequency, is used to determine the range and speed.