This paper reports a 24 GHz ISM band radar module for pedestrian detection in crosswalks. The radar module is composed of an RF transceiver board, a baseband board, and a microcontroller unit board. The radar signal is a sawtooth frequency-modulated continuous-wave signal with a center frequency of 24.15 GHz, a bandwidth of 200 MHz, a chirp length of 80 μs, and a pulse repetition interval of 320 μs. The radar module can detect a pedestrian on a crosswalk with a width of 4 m and a length of 14 m. The radar outputs the range, angle, and speed of the detected pedestrians every 50 ms by radar signal processing and consumes 7.57 W from 12 V power supply. The size of the radar module is 110 × 70 mm2.
KSP Keywords
15 GHz, 2.4 GHz, Center frequency, Frequency-Modulated Continuous Wave(FMCW), ISM bands, RF transceiver, Radar signal Processing, continuous wave(CW), fmcw radar, microcontroller unit, pedestrian detection
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