{'fraction_non_alphanumeric': 0.023192360163710776, 'fraction_numerical': 0.002728512960436562, 'mean_word_length': 5.066115702479339, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Investigating a Portable Low-Cost Target Simulator for Doppler Radars

This article presents a study on employing a single-sideband (SSB) mixer as a target simulator for Doppler radar sensors. The SSB mixer modulates the continuous-wave radio frequency (RF) signal transmitted by the Doppler radar, similar to a moving target. To prove the effectiveness of the proposed target simulator, the response of a real human target performing a hand gesture is emulated using the target simulator. The spectrogram of the human hand gesture and the simulator-generated gesture have been compared for performance evaluation. A 5.8-GHz prototype of the proposed target simulator and the obtained experimental results are presented in the paper.