Irada

Kumasistimu e-radar, izitholi zisetshenziswa kakhulu ukuguqula isignali ye-echo eyamukelwe i-radar isuka kusignali yefrikhwensi yomsakazo (RF) ibe isignali ye-baseband ukuze kuqhutshekwe nokucutshungulwa okufana nokukalwa kwebanga nokulinganisa isivinini esiqondiwe. Ngokukhethekile, amasignali e-RF anemvamisa ephezulu akhishwa i-radar ajabulisa amagagasi ahlakazekile kulokho okuqondiwe, futhi ngemva kokuba lezi zimpawu ze-echo waveform zamukelwe, ukucutshungulwa kokwehlisa isignali kudingeka kwenziwe ngomtshina. Umtshina uguqula izinguquko ku-amplitude kanye nemvamisa yamasiginali e-RF yefrikhwensi ephezulu abe yi-DC noma amasiginali kagesi wefrikhwensi ephansi ukuze kucutshungulwe amasignali okulandelayo.

Umtshina empeleni uyingxenye yemojula yokusebenza kumzila wokwamukela i-radar, ikakhulukazi okufaka isikhulisi sesignali, i-mixer, i-oscillator yendawo, isihlungi kanye ne-amplifier eyakhiwe yisamukeli sesignali ye-echo. Phakathi kwazo, i-oscillator yendawo ingasetshenziswa njengomthombo wesiginali yereferensi (I-Oscillator Yendawo, i-LO) ukuhlinzeka nge-co-signal yokuxuba ukuxuba, futhi izihlungi nama-amplifiers asetshenziselwa ikakhulukazi ukuhlunga okubuthakathaka kwe-clutter yamasekethe kanye nokukhulisa isignali ye-IF. Ngakho-ke, umtshina udlala indima ebalulekile ohlelweni lwe-radar, futhi ukusebenza kwawo nokuzinza kokusebenza kuthinta ngokuqondile ukutholwa nekhono lokulandela umkhondo wesistimu ye-radar.

Isikhathi sokuthumela: Jun-25-2023