. . . . . . "896102"^^ . "Kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem (anglicky Phase-shift keying, PSK) je metoda digit\u00E1ln\u00ED modulace, kter\u00E1 pro p\u0159enos informac\u00ED pou\u017E\u00EDv\u00E1 zm\u011Bny f\u00E1ze referen\u010Dn\u00EDho sign\u00E1lu (nosn\u00E9 vlny). PSK se pou\u017E\u00EDv\u00E1 pro ni\u017E\u0161\u00ED rychlosti komunikace u Bluetooth, Wi-Fi a pro RFID.Digit\u00E1ln\u00ED modulace pou\u017E\u00EDvaj\u00ED pro reprezentaci digit\u00E1ln\u00EDch dat kone\u010Dn\u00FD po\u010Det sign\u00E1l\u016F. U PSK se tyto sign\u00E1ly li\u0161\u00ED r\u016Fzn\u00FDmi posuvy f\u00E1ze, z nich\u017E ka\u017Ed\u00FD reprezentuje ur\u010Ditou hodnotu jednoho nebo n\u011Bkolika bit\u016F."@cs . . . . "modulaci f\u00E1zov\u00FDm posuvem"@cs . . "82"^^ . . "DQPSK"@cs . . . "Kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem"@cs . . . "PSK"@cs . . . "SOQPSK"@cs . "33505"^^ . . . . . . . . . . . . "f\u00E1zov\u00FDm posuvem"@cs . . . . . . . . . . "QPSK (info, \u010Desky)"@cs . . . . . . . . . . . . . . . . . . . . "16377262"^^ . . . . "DPSK (info, \u010Desky)"@cs . . "OQPSK"@cs . . "Kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem (anglicky Phase-shift keying, PSK) je metoda digit\u00E1ln\u00ED modulace, kter\u00E1 pro p\u0159enos informac\u00ED pou\u017E\u00EDv\u00E1 zm\u011Bny f\u00E1ze referen\u010Dn\u00EDho sign\u00E1lu (nosn\u00E9 vlny). PSK se pou\u017E\u00EDv\u00E1 pro ni\u017E\u0161\u00ED rychlosti komunikace u Bluetooth, Wi-Fi a pro RFID.Digit\u00E1ln\u00ED modulace pou\u017E\u00EDvaj\u00ED pro reprezentaci digit\u00E1ln\u00EDch dat kone\u010Dn\u00FD po\u010Det sign\u00E1l\u016F. U PSK se tyto sign\u00E1ly li\u0161\u00ED r\u016Fzn\u00FDmi posuvy f\u00E1ze, z nich\u017E ka\u017Ed\u00FD reprezentuje ur\u010Ditou hodnotu jednoho nebo n\u011Bkolika bit\u016F. U v\u011Bt\u0161iny metod ka\u017Ed\u00E1 f\u00E1ze k\u00F3duje stejn\u00FD po\u010Det bit\u016F. Ka\u017Ed\u00FD bitov\u00FD vzor tvo\u0159\u00ED tak zvan\u00FD symbol, kter\u00FD je reprezentov\u00E1n ur\u010Dit\u00FDm f\u00E1zov\u00FDm posuvem. Demodul\u00E1tor, kter\u00FD je navr\u017Een pro konkr\u00E9tn\u00ED sadu symbol\u016F, ur\u010Duje f\u00E1zi p\u0159ij\u00EDman\u00E9ho sign\u00E1lu a mapuje ji zp\u011Bt na p\u016Fvodn\u00ED symboly. Jestli\u017Ee demodul\u00E1tor porovn\u00E1v\u00E1 f\u00E1zi p\u0159ij\u00EDman\u00E9ho sign\u00E1lu s referen\u010Dn\u00EDm sign\u00E1lem, mluv\u00EDme o koherentn\u00EDm detektoru (anglicky Coherent Phase-Shift Keying, CPSK).Druhou mo\u017Enost\u00ED je, \u017Ee demodul\u00E1tor neporovn\u00E1v\u00E1 aktu\u00E1ln\u00ED sign\u00E1l s referen\u010Dn\u00ED vlnou, ale s p\u0159edchoz\u00EDm pr\u016Fb\u011Bhem p\u0159ij\u00EDman\u00E9ho sign\u00E1lu, neboli \u0159\u00EDd\u00ED se zm\u011Bnou f\u00E1ze p\u0159ij\u00EDman\u00E9ho sign\u00E1lu. Tato metoda se naz\u00FDv\u00E1 diferenci\u00E1ln\u00ED kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem (anglicky differential phase-shift keying, DPSK). DPSK m\u016F\u017Ee b\u00FDt v\u00FDrazn\u011B jednodu\u0161\u0161\u00ED ne\u017E b\u011B\u017En\u00E9 PSK, proto\u017Ee demodul\u00E1tor nemus\u00ED udr\u017Eovat kopii referen\u010Dn\u00EDho sign\u00E1lu pro ur\u010Den\u00ED p\u0159esn\u00E9 f\u00E1ze p\u0159ij\u00EDman\u00E9ho sign\u00E1lu (jedn\u00E1 se o nekoherentn\u00ED metodu). Nev\u00FDhodou je, \u017Ee \u010Dast\u011Bji doch\u00E1z\u00ED k chybn\u00E9 demodulaci."@cs . . . . . . . . . . . . . "Kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem"@cs . "kl\u00ED\u010Dov\u00E1n\u00ED f\u00E1zov\u00FDm posuvem"@cs . . . "DPQPSK"@cs . . . . . .