Usati wanzwisisa tekinoroji yePAM4, chii chinonzi tekinoroji yekuchinja masaini? Tekinoroji yekushandura masaini inzira yekushandura masaini ebaseband (masaini emagetsi asina kugadzirwa) kuita masaini ekutumira masaini. Kuti uve nechokwadi chekuti kutaurirana kunoshanda uye kukunda matambudziko ekutumira masaini kure, zvakakosha kutamisa masaini kuenda kune chiteshi chine frequency yakakwira kuburikidza nekushandura masaini ekutumira masaini.
PAM4 inzira yekuchinja pulse amplitude modulation (PAM) yechikamu chechina.
Chiratidzo chePAM itekinoroji inozivikanwa yekutumira masaini mushure meNRZ (Non Return to Zero).
Chiratidzo cheNRZ chinoshandisa mazinga maviri echiratidzo, epamusoro neakaderera, kumiririra 1 ne 0 yechiratidzo chedhijitari chelogic, uye chinogona kutumira 1 bit yeruzivo rwelogic pawachi yega yega.
Chiratidzo chePAM4 chinoshandisa mazinga mana akasiyana echiratidzo chekutumira chiratidzo, uye wachi yega yega inogona kutumira mabhiti maviri eruzivo rwelogic, anoti 00, 01, 10, uye 11.
Saka, pasi pemamiriro akafanana ebhaud rate, bit rate yePAM4 signal yakapetwa kaviri pane yeNRZ signal, izvo zvinowedzera kaviri kushanda kwetransmission uye zvinoderedza mitengo zvinobudirira.
Tekinoroji yePAM4 yave ichishandiswa zvakanyanya muchikamu chekubatanidza masaini ekumhanya kwepamusoro. Parizvino, kune module ye400G optical transceiver yakavakirwa patekinoroji yePAM4 modulation yedata center uye module ye50G optical transceiver yakavakirwa patekinoroji yePAM4 modulation ye5G interconnection network.
Maitiro ekushandisa 400G DML optical transceiver module zvichibva paPAM4 modulation ndeekuti: pakutumira masaini eyuniti, machaneli gumi nematanhatu anogamuchirwa e25G NRZ emagetsi anopinzwa kubva kuyuniti yemagetsi, anogadziriswa kare neDSP processor, PAM4 modulated, uye anoburitsa machaneli masere e25G PAM4 emagetsi, ayo anoiswa padriver chip. Masaini emagetsi anomhanyisa anoshandurwa kuita machaneli masere e50Gbps emagetsi anomhanyisa kuburikidza nemachaneli masere emalaser, akabatanidzwa newavelength division multiplexer, uye anogadzirwa kuita chiteshi chimwe che400G high-speed optical signal output. Pakugamuchira masaini eyuniti, 1-channel 400G high-speed optical signal inopinzwa kuburikidza neyuniti ye optical interface, inoshandurwa kuita 8-channel 50Gbps high-speed optical signal kuburikidza ne demultiplexer, inogamuchirwa ne optical receiver, uye inoshandurwa kuita signal yemagetsi. Mushure mekudzoreredzwa kwewachi, kuwedzerwa, kuenzana, uye kubviswa kwePAM4 neDSP processing chip, chiratidzo chemagetsi chinoshandurwa kuita nzira gumi nematanhatu dzechiratidzo chemagetsi che25G NRZ.
Shandisa tekinoroji yePAM4 modulation kumamodule e400Gb/s optical. Module ye400Gb/s optical yakavakirwa paPAM4 modulation inogona kuderedza huwandu hwema laser anodiwa pamagumo ekutumira uye saizvozvo kuderedza huwandu hwevanogamuchira vanodiwa pamagumo ekugamuchira nekuda kwekushandisa matekiniki emodulation emhando yepamusoro zvichienzaniswa neNRZ. PAM4 modulation inoderedza huwandu hwezvikamu zve optical mu optical module, izvo zvinogona kuunza mabhenefiti akadai sekudzikira kwemitengo yekubatanidza, kuderedzwa kwesimba remagetsi, uye saizi diki yekurongedza.
Pane kudiwa kwemamodule e50Gbit/s optical mu5G transmission uye backhaul networks, uye mhinduro yakavakirwa pamidziyo ye25G optical uye inowedzerwa nePAM4 pulse amplitude modulation format inotorwa kuti iwane zvinodiwa zvebandwidth zvakachipa uye zvakakwirira.
Pakutsanangura zviratidzo zvePAM-4, zvakakosha kutarisisa musiyano uripo pakati pehuwandu hwebaud nehuwandu hwebit. Kune zviratidzo zveNRZ zvechinyakare, sezvo chiratidzo chimwe chichitumira bit imwe yedata, huwandu hwebit nehuwandu hwebaud zvakafanana. Semuenzaniso, mu100G Ethernet, uchishandisa zviratidzo zvina zve25.78125GBaud zvekutapurirana, huwandu hwebit pachiratidzo chimwe nechimwe i25.78125Gbps, uye zviratidzo zvina zvinosvika pa100Gbps; Kune zviratidzo zvePAM-4, sezvo chiratidzo chimwe chichitumira 2 bits yedata, huwandu hwebit hunogona kutapurirana hwakapetwa kaviri kupfuura huwandu hwebaud. Semuenzaniso, uchishandisa nzira ina dze26.5625GBaud dzekutapurirana mu200G Ethernet, huwandu hwebit pachiteshi chimwe nechimwe i53.125Gbps, uye nzira ina dzesignali dzinogona kusvika pa200Gbps zvekutapurirana. Kune 400G Ethernet, inogona kuwanikwa ne8 channels dze26.5625GBaud.
Nguva yekutumira: Ndira-02-2025