Blog

Letšoao la digital baseband ke waveform ea motlakase e emelang tlhahisoleseding ea digital, e ka emeloa ke maemo a fapaneng kapa maqhubu. Ho na le mefuta e mengata ea matshwao a dijithale a baseband (eo ka mora moo a bitswang matshwao a baseband). Setšoantšo sa 6-1 se bonts'a maqhubu a 'maloa a motheo a baseband, ...

Matshwao a kananelo a ka arolwa ka matshwao a matla le matshwao a matla ho ya ka matla a ona. Lipontšo tsa matla li ka aroloa ka lipontšo tsa nako le nako le lipontšo tsa aperiodic ho latela hore na ke nako kapa che. Letšoao la matla le na le moeli ka boholo le nako, matla a lona ke ...

Ha matla a phetiso ea mocha oa 'mele a phahame ho feta tlhoko ea lets'oao le le leng, mocha o ka arolelanoa ka matšoao a mangata. Ka mohlala, teraka ea tsamaiso ea lithelefono hangata e na le melaetsa e likete-kete e fetisetsoang mothapong o le mong oa optical. Multiplexing ke theknoloji e rarollang ...

1) Khoutu ea AMI Lebitso le felletseng la khoutu ea AMI (Alternative Mark Inversion) ke khoutu e 'ngoe ea phetoho ea letšoao. blank) lula bo sa fetohe. Mohlala: Khouto ya molaetsa: 0 1 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1… AMI khoutu: 0 -1 +1 0 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… Sebopeho sa wave e tsamaellanang le khoutu ea AMI ke ...

Ha re fetisa letšoao, ebang ke lets'oao la optical, lets'oao la motlakase, kapa lets'oao le se nang mohala, haeba le fetisoa ka kotloloho, lerata le ferekanngoa habonolo, 'me ho thata ho fumana tlhahisoleseling e nepahetseng qetellong ea ho amohela. E le ho ntlafatsa bokhoni ba ho thibela ho kena-kenana le ...

Mekhoa ea motheo ea binary digital modulation ke: Binary amplitude keying (2ASK) - phetoho ea amplitude ea letšoao la mochine; Binary frequency shift keying (2FSK) - phetoho ea maqhubu a lets'oao la sesebelisoa; Binary phase shift keying (2PSK) - phetoho ea mohato oa lets'oao la mochini. Differential phase shift keyin...