Nkhani

Pamene mphamvu yotumizira ya mayendedwe akuthupi ndipamwamba kuposa kufunikira kwa siginecha imodzi, njirayo imatha kugawidwa ndi ma sign angapo. Mwachitsanzo, thunthu la matelefoni nthawi zambiri limakhala ndi masauzande ambiri azizindikiro zomwe zimatumizidwa pamtundu umodzi wa optical fiber. Multiplexing ndiukadaulo womwe umathetsa ...

1) Khodi ya AMI Dzina lonse la code ya AMI (Alternative Mark Inversion) ndi nambala ina yosinthira chizindikiro. blank) kukhalabe osasintha. Chitsanzo: Khodi ya uthenga: 0 1 1 0 0 0 0 0 0 0 1 1 0 0 1 1… AMI kodi: 0 -1 +1 0 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… zogwirizana ndi AMI code ndi ...

Pamene titumiza chizindikiro, kaya ndi chizindikiro cha kuwala, chizindikiro cha magetsi, kapena chizindikiro chopanda zingwe, ngati chikuperekedwa mwachindunji, chizindikirocho chimasokonezeka mosavuta ndi phokoso, ndipo n'zovuta kupeza chidziwitso cholondola pamapeto olandira. Pofuna kukonza luso la anti-interference ...

Njira zoyambira zakusintha kwa digito ndi: Binary amplitude keying (2ASK) -kusintha kwa matalikidwe a chizindikiro chonyamulira; Binary frequency shift keying (2FSK) -kusintha pafupipafupi kwa chizindikiro chonyamulira; Binary phase shift keying (2PSK) -kusintha kwagawo kwa chizindikiro chonyamulira. Kusintha kwagawo losiyana makiyi ...

Dongosolo la PON limagwiritsa ntchito ukadaulo wogawanitsa nthawi munjira ya uplink, ndipo ONU imatumiza ma datagraphs kupita ku uplink direction molingana ndi sitampu yanthawi yomwe OLT idaperekedwa. ONU ikatulutsa kuwala popanda kuyika sitampu yanthawi, imasemphana ndi ma siginecha ena pa...

Ndi chitukuko cha njira zoyankhulirana zowoneka bwino zokhala ndi mtunda wautali, mphamvu zazikulu, ndi liwiro lapamwamba, makamaka pamene mafunde amodzi amachokera ku 40g mpaka 100g kapena ngakhale super 100g, chromatic dispersion, nonlinear zotsatira, polarization mode dispersion, ndi zotsatira zina zopatsirana. ..