ʻO nā ala maʻamau o ka modulation kikohoʻe binary: ʻo ke kī amplitude binary (2ASK) - ka hoʻololi amplitude o ka hōʻailona lawe; Binary frequency shift keying (2FSK)- ka hoʻololi pinepine o ka hōʻailona lawe; ʻO ka hoʻololi ʻana i ka hana binary (2PSK) - Hoʻololi i ka pae o ka hōʻailona lawe. Ma muli o ka maopopo ʻole o ka pae ma ka ʻōnaehana 2PSK, ua hoʻomohala ʻia ke kī kī 2DPSK ʻokoʻa.
ʻO ka bandwidth i koi ʻia e 2ASK a me 2PSK he pālua ka helu helu. Pono ʻo 2FSK i kahi bandwidth kiʻekiʻe ma mua o 2ASK a me 2PSK.
ʻO ka hapa hapa hapa o nā ʻōnaehana digital modulation binary e pili ana i ka hōʻailona noise ratio (SNR) o ka demodulator. Ma ke ʻano o ka leo Gaussian keʻokeʻo anti-additive, ʻoi aku ka maikaʻi o ka 2PSK coherent, ukali ʻia e 2FSK, a ʻo 2ASK ka hana ʻino loa.
ʻO ASK kekahi o nā ʻano hoʻololi kumu mua loa. ʻO kāna mau mea maikaʻi he mea maʻalahi ia a me ka hoʻohana ʻana i ka band frequency kiʻekiʻe; ʻO ka hemahema, ʻaʻole maikaʻi ka hana anti-noise, a maʻalahi ia i ka hoʻololi ʻana o nā ʻano channel.tics, a ʻaʻole maʻalahi ka hana ʻana i ka mea ʻike hoʻoholo hoʻohālike i ka mokuʻāina paepae hoʻoholo maikaʻi loa.
ʻO FSK kahi ʻano modulation pono ʻole i ka kamaʻilio digital. ʻO kāna mea maikaʻi ʻo ia ka ikaika anti-interference a ʻaʻole i hoʻopilikia ʻia e nā hoʻololi ʻana o ke kahawai, no laila ua kūpono loa ʻo FSK no nā kahawai mae. ʻO ka hemahema, ʻo ia ka laulā o ka pahu alapine i noho ʻia, ʻoi aku ka nui o MF-SK, a haʻahaʻa ka hoʻohana ʻana i ka band frequency. I kēia manawa, hoʻohana nui ʻia ka ʻōnaehana modulation frequency i ka lawe ʻana i ka ʻikepili wikiwiki a haʻahaʻa.
ʻO PSK a i ʻole DPSK kahi ʻano modulation me ka maikaʻi o ka hoʻouna ʻana, ʻoi aku ka ikaika o kona anti-noise ma mua o ASK a me FSK, a ʻaʻole maʻalahi i ka hoʻololi ʻana o nā hiʻohiʻona o ke kahawai, no laila ua hoʻohana nui ʻia i ka hoʻoili ʻikepili kiʻekiʻe a me ka wikiwiki. . Loaʻa ka pilikia o ka hoʻololi ʻana o ka pae ʻokoʻa (PSK) i ka ambiguity pae lawe i ka demodulation coherent, no laila ʻaʻole i hoʻohana ʻia i ka hoʻouna pololei ʻana i ka hana. Hoʻohana nui ʻia ka MDPSK.
ʻO ka mea ma luna ka ʻatikala "Binary digital modulation" i lawe ʻia e Shenzhen HDV Phoelectron Technology Co., LTD. He mea hana kūikawā i nā lako kamaʻilio e like me nā huahana nui, e like meONUhuahana moʻo:OLT ONU, ACONU, KūkākūkāONU, fiber opticalONU, CATVONU, GPONONU, XPONONU, etc., hiki ke hoʻohana ʻia nā mea hana ma luna i nā hiʻohiʻona ola like ʻole, a me nā mea piliONUHiki ke hoʻopilikino ʻia nā huahana series e like me kā lākou pono ponoʻī. Hiki i kā mākou hui ke hāʻawi i ke kākoʻo loea a maikaʻi loa. Ke kali nei i kou kipa ʻana.
