Intshayelelo
Ngexesha leunxibelelwano olulodwa of amakhonkco erediyo abalulekileyo,tuyaphela amandla kanomathotholoiya kuchaphazela umgama wonxibelelwano.Kwinqaku, siya kukwazisa kwiinkcukacha ezivela kwiimpawu zayo kunye nokuhlelwa.
IIiMpawu eziBulalayo zamaza eRadio
Iimpawu zemitha ethe ngqo yemitha, i-refraction, imbonakalo, ukusasazeka, ukuphazamiseka kunye nokufunxwa kwamaza kanomathotholo kwenza amaza erediyo athothe kancinci ngokunyuka komgama wosasazo.
(1) Ukuba amaza kanomathotholo asasazeka kwimigama emikhulu nemikhulu nakwimimandla yesithuba kwindawo ekhululekileyo, amandla amaza kanomathotholo aya kusasazeka ngakumbi nangakumbi, nto leyo ebangela ukuncipha kokusasazwa (oko kukuthi, ukulahleka kwendlela).Ichazwa njengomlinganiselo woxinaniso lwamandla kumgama othile wokusasaza ukusuka kumthombo wokusasazeka kwemitha ukuya kuxinaniso lwamandla kumgama weyunithi, kwaye ixabiso layo lichasene ngokuphambanayo kwisikwere somgama wosasazo.
(2) Ngelixa usasaza phakathi, ukongeza ekunciphiseni ukusasazwa, amandla amaza erediyo nawo aya kusetyenziswa sisiphakathi, okukhokelela ekuncipheni kokufunxwa kunye nokuthomalalisa irefraction.Isalathiso se-refractive n kunye ne-absorption attenuation eqhubekayo ɑ yamaza e-electromagnetic asasaza kumajelo ohlukeneyo ahlukile.
Ilahleko yendlela yokusasaza yesignali yerediyo ethunyelwe sisikhululo sesiseko sichaphazeleka kakhulu kumhlaba kunye nezinto ezisemhlabeni.Ukuphakama kwesikhululo sesiseko, kokukhona umqondiso uya kuhamba.
Ukusasazwa kwamaza erediyo kukwanxulumene nokuphindaphinda.Okukhona iphezulu i-frequency, kokukhona ilahleko enkulu yendlela, kokukhona buthathaka isakhono se-diffraction, kunye nokusondela komgama wosasazo.Ngokuchaseneyo kwiifrikhwensi ezisezantsi.
Ukuhlelwa kwamaza kanomathotholo aphelayo
(1) Ngokwempembelelo yokuphela kweempawu zerediyo, ukuphela kwamaza kanomathotholo ngexesha lokuhanjiswa kwindawo engenazingcingo kwahlulwe3iindidi:
● I-Avareji yoLahleko lweNdlela-Umndilili ofunyenweyo wamandla ophawu uyahluka ngokungafaniyo kunye namandla athile okunyusa ubude bomgama.
● Ukukhanya kwesithunzi - xa i-radio wave idibana nesithunzi sentsimi ye-electromagnetic ebangelwa yimiqobo eyahlukeneyo kwindlela yokusasaza, inqanaba lendawo ye-median litshintsha ngobunono ngendawo, ixesha kunye nesantya sokuhamba, oku kubizwa ngokuba yi-shadow fading (ngenxa yotshintsho olucothayo, ngoko ke iyatshintsha. kukwabizwa ngokuba yi-cocote fading).
● UKufiphala kweMultipath - Iyaphela ngenxa yosasazo lweendlela ezininzi.I-amplitude kunye nesigaba se-wave edibeneyo kwisikhululo esifumanayo siguquguquka ngokukhawuleza kunye nokuhamba kwesikhululo esihambayo.Le nto ibizwa ngokuba yi-multipath fading (ikwabizwa ngokuba yi-fading fast kuba amandla ophawu olufunyenweyo atshintsha ngokukhawuleza).
(2) Ngokobukhulu botshintsho lwamandla entsimi yesignali efunyenweyo, ukufiphala kwamaza onomathotholo kwahlulwe kwi-3iintlobo:
● Ukufiphala komlinganiselo omkhulu - kuchaza ukuthomalaliswa komqondiso obangelwa ngumgama, kunye neempawu zamandla omqondiso owamkelweyo kwisithuba somlinganiselo omkhulu (amakhulu okanye iikhilomitha) ezihluka ngomgama wogqithiso nowokwamkela.
●I-Mesoscale Fading - Uphawu olucothayo lwe-median lufumene amandla omqondiso kwisithuba somlinganiselo ophakathi (amakhulu amaza obude).
● Ukufiphala okuncinci-utshintsho olukhawulezayo lweempawu zexabiso elikhawulezayo lamandla entsimi yesignali efunyenweyo kwisithuba esincinci (amashumi amaza).
Kwimeko yeselula kukho iziphumo ezimbini:
1. Ubuninzi beendlela, ukuphelelwa ngokukhawuleza kwexesha elifutshane okubangelwa kukubonakalisa kunye nokusabalalisa ukusuka kwizakhiwo okanye ezinye izinto.
2. Utshintsho olucothayo lwexesha elide kumandla omqondiso olawulayo oveliswa yindlela ebonakalayo ngokuthe ngqo.Ijelo lisebenza ngokukhawuleza elithobela ukuhanjiswa kweRayleigh kwaye libekwe phezulu kunye nokuncipha okucothayo ukuba i-amplitude yomqondiso ihambelana nokusabalalisa okuqhelekileyo kwe-logarithmic.
IWAVE UNXIBELELWANO CO., LTD.igqwesa kuyilo kunye nokwenziwa koluhlu olude oluqinileyo lwezixhobo zedatha ezingasebenzi ngamacingo.Ukuveliswa kwethu okuqhubekayo kunye nokusebenza kwemveliso engenakulinganiswa kusenze safumana igama elithembekileyo kwishishini elingenazingcingo.
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Ixesha lokuposa: Aug-15-2023
