Isimiso:Isimiso se-Direct Sequence Spread Spectrum system silula kakhulu. Isibonelo, uchungechunge lolwazi oluzothunyelwa lunwetshwa lube yibhendi yefrikhwensi ebanzi kakhulu ngekhodi ye-PN. Ekupheleni kokwamukela, ulwazi oluthunyelwe lubuyiswa ngokuhlobanisa isiginali ye-spectrum esabalele nekhodi ye-PN efanayo esetshenziselwa ukunwetshwa ekugcineni kokuthumela.
Umgomo wokujula:Okokuqala, isebenzisa ngokuqondile uchungechunge lwekhodi ye-spectrum yokusabalalisa enenani eliphezulu lekhodi ukusabalalisa i-spectrum yesiginali kumthumeli ngokusebenzisa izindlela ezihlukahlukene zokumodemu, bese isebenzisa ukulandelana okufanayo kwekhodi ye-spectrum yokusabalalisa ukuze kukhishwe ikhodi kumamukeli ukubuyisela ukusabalala. isignali ye-spectrum kulwazi lwangempela. Indlela yokusabalalisa i-spectrum ngokuqondile: Eqinisweni, indlela yokumodulation yedijithali isetshenziswa. Ngokukhethekile, ikhodi ethile ye-PN (ikhodi mbumbulu yomsindo) isetshenziselwa ukwengeza umthombo wesiginali. Isibonelo, uma isidlulisi sidinga ukudlulisa amasiginali, buyisela okuthi “1″ ngo-110001000110 kanye no-“0” ngo-00110010110. Le nqubo ibona i-spectrum ebanzi. Kumamukeli, uma ukulandelana okutholiwe kungu-110001001110, kuzobuyiselwa kokuthi “1″ futhi uma kungu-“00110010110,” kuzobuyiselwa ku-“0″. Lokhu kubizwa ngokuthi “isinkwa. Ngale ndlela, izinga lomthombo wesignali likhuphuka izikhathi ezingu-11, futhi inzuzo yokucubungula ingaphezu kuka-10dB, okuthuthukisa ngokuphumelelayo isilinganiso somsindo omningi womshini wonke.
Umkhawulokudonsa we-RF wesistimu ye-DSSS ubanzi kakhulu. Ngakho-ke, ingxenye encane ye-spectrum ngeke ibangele ukufiphala okukhulu kwe-spectrum yesignali, okungenye yezinzuzo zayo. I-DSSS inhle kakhulu ekuvikelekeni kwayo, yingakho amasosha ase-US eyisebenzisela ukuthunyelwa okungenantambo phakathi neMpi Yezwe II.
Okungenhla kuyincazelo yolwazi ye-Direct Sequence Spread Spectrum (DSSS) Communication - Umgomo Wokuxhumana olethwe kuwe ngu.I-Shenzhen HDV Optoelectronic Technology Co., Ltd., umkhiqizi wezinto zokuxhumana ezibonakalayo. ngethemba ukuthi lesi sihloko singakusiza ukukhulisa ulwazi lwakho. Siyabonga ngokufunda lesi sihloko.