Ukuhlaziya nokucutshungulwa kwesignali yokutholwa kwenkulumo eyirimothi ye-laser

I-Laserukuhlaziya nokucutshungulwa kwesignali yokuthola inkulumo ekude
Ukukhishwa kwekhodi komsindo wesignali: ukuhlaziywa kwesignali nokucutshungulwa kokutholwa kwenkulumo yesilawuli kude
Esigcawini esimangalisayo sobuchwepheshe, ukutholwa kwenkulumo okukude nge-laser kufana ne-symphony enhle, kodwa le symphony iphinde ibe “nomsindo” wayo - umsindo wesignali. Njengezithameli ezinomsindo ngokungalindelekile ekhonsathini, umsindo uvame ukuphazamisaukutholwa kwenkulumo nge-laser. Ngokomthombo, umsindo wokutholwa kwesignali yenkulumo yesilawuli kude nge-laser ungahlukaniswa cishe ube umsindo owethulwa ithuluzi lokulinganisa lokudlidliza kwe-laser ngokwalo, umsindo owethulwa eminye imithombo yomsindo eduze kwethagethi yokulinganisa ukudlidliza kanye nomsindo odalwa ukuphazamiseka kwemvelo. Ukutholwa kwenkulumo yebanga elide ekugcineni kudinga ukuthola izimpawu zenkulumo ezingabonwa ukuzwa komuntu noma imishini, futhi imisindo eminingi exubile evela endaweni yangaphandle kanye nesistimu yokuthola kuzonciphisa ukuzwakala nokuqondakala kwamasignali enkulumo atholiwe, kanye nokusabalalisa ibhendi yefrikhwensi. yale misindo ngokwengxenye ihambisana nokusatshalaliswa kwebhendi yefrikhwensi enkulu yesignali yenkulumo (cishe 300~3000 Hz). Ngeke ihlungwe kalula ngezihlungi zendabuko, futhi ukucubungula okwengeziwe kwamasignali enkulumo atholiwe kuyadingeka. Njengamanje, abacwaningi bafunda ngokuyinhloko ukudalulwa komsindo we-broadband ongamile kanye nomsindo womthelela.
Umsindo ongemuva we-Broadband ngokuvamile ucutshungulwa ngendlela yesikhathi esifushane yokulinganisa i-spectrum, indlela ye-subspace kanye namanye ama-algorithms okucindezela umsindo asekelwe ekucubunguleni isignali, kanye nezindlela ezivamile zokufunda ngomshini, izindlela zokufunda ezijulile nobunye ubuchwepheshe bokuthuthukisa inkulumo ukuze kuhlukaniswe amasignali enkulumo emsulwa kusukela ngemuva. umsindo.
Umsindo we-Impulse umsindo wamachashaza ongase wethulwe umthelela wamachashaza aguquguqukayo lapho indawo yethagethi yokutholwa iphazanyiswa ukukhanya kokutholwa kwesistimu yokuthola i-LDV. Njengamanje, lolu hlobo lomsindo lususwa kakhulu ngokuthola indawo lapho isignali inenani eliphakeme lamandla bese ifaka inani elibikezelwe esikhundleni salo.
Ukutholwa kwezwi okukude nge-laser kunamathuba ohlelo lokusebenza emikhakheni eminingi efana nokucasha, ukuqapha kwemodi eminingi, ukutholwa kokungena, ukusesha nokuhlenga, imakrofoni ye-laser, njll. Kungabikezelwa ukuthi inkambiso yocwaningo lwesikhathi esizayo yokutholwa kwezwi okukude nge-laser izosekelwe kakhulu (1) ukuthuthukisa ukusebenza kokulinganisa kwesistimu, njengokuzwela kanye nesilinganiso sesignali-kuya-nomsindo, ukuthuthukisa imodi yokuthola, izingxenye kanye nesakhiwo sesistimu yokuthola; (2) Thuthukisa ukuzivumelanisa nezimo kwama-algorithms okucubungula isignali, ukuze ubuchwepheshe bokuthola inkulumo nge-laser bukwazi ukuzivumelanisa namabanga ahlukene wokulinganisa, izimo zemvelo kanye nokuhlosiwe kokulinganisa kokudlidliza; (3) Ukukhethwa okunengqondo okwengeziwe kokuhlosiwe kokulinganisa ukudlidliza, kanye nesinxephezelo sefrikhwensi ephezulu yamasignali enkulumo akalwa kokuhlosiwe okunezici ezihlukile zokuphendula imvamisa; (4) Thuthukisa ukwakheka kwesistimu, futhi uthuthukise ngokwengeziwe isistimu yokuthola ngokusebenzisa

miniaturization, ukuphatheka kanye nenqubo ehlakaniphile yokuthola.

I-FIG. 1 (a) Umdwebo wohlelo lokunqamula i-laser; (b) Umdwebo oyisikimu wesistimu ye-laser anti-interception