{"id":3295,"date":"2011-09-26T14:38:59","date_gmt":"2011-09-26T12:38:59","guid":{"rendered":"http:\/\/dev.ds.unipi.gr\/msc1\/?p=3295"},"modified":"2020-10-15T17:07:43","modified_gmt":"2020-10-15T15:07:43","slug":"development-of-software-defined-radio-systems","status":"publish","type":"post","link":"https:\/\/masters.ds.unipi.gr\/dcomms\/development-of-software-defined-radio-systems\/","title":{"rendered":"\u0391\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u0391\u03c3\u03cd\u03c1\u03bc\u03b1\u03c4\u03c9\u03bd \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b2\u03b1\u03c3\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u039b\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03cc"},"content":{"rendered":"<h3>\u03a3\u03c4\u03cc\u03c7\u03bf\u03c2<\/h3>\n<p style=\"text-align: justify;\">\u03a3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b5\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03ba\u03b1\u03b9 \u03b5\u03bc\u03b2\u03ac\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ce\u03bd \u03c3\u03b5 \u03c0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ac \u03b8\u03ad\u03bc\u03b1\u03c4\u03b1 \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2 \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03b5\u03ba\u03c4\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03b1\u03c3\u03c5\u03c1\u03bc\u03ac\u03c4\u03c9\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 Software Defined Radio (SDR). \u03a3\u03c4\u03bf \u03bc\u03ac\u03b8\u03b7\u03bc\u03b1, \u03bf\u03b9 \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ad\u03c2 \u03b8\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b5 \u03b8\u03ad\u03c3\u03b7 \u03bc\u03ad\u03c3\u03c9 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b5\u03ba\u03c0\u03ad\u03bc\u03c8\u03bf\u03c5\u03bd \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03ac \u03c3\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ce\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ce\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd (\u03c0.\u03c7. LTE, Wi-Fi) \u03ba\u03b1\u03b9 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b1 \u03bd\u03b1 \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b2\u03b1\u03b8\u03bc\u03af\u03b4\u03b5\u03c2 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03bb\u03ae\u03c8\u03b7\u03c2. \u038c\u03bb\u03b5\u03c2 \u03bf\u03b9 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b5\u03c2 \u03c3\u03cd\u03bd\u03b8\u03b5\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2 \u03c3\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03b8\u03b1 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03bf\u03cd\u03bd \u03bc\u03b5 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03c4\u03c9\u03bd \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03c9\u03bd \u03b2\u03b1\u03b8\u03bc\u03af\u03b4\u03c9\u03bd \u03bc\u03b5 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03bf\u03cd, \u03b5\u03bd\u03ce \u03b7 \u03b5\u03ba\u03c0\u03bf\u03bc\u03c0\u03ae\/\u03bb\u03ae\u03c8\u03b7 \u03b8\u03b1 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03bc\u03b5 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd SDR \u03ba\u03b1\u03b9 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd \u03c0\u03bb\u03b1\u03c4\u03c6\u03bf\u03c1\u03bc\u03ce\u03bd (desktop) \u03b3\u03b5\u03bd\u03b9\u03ba\u03bf\u03cd \u03c3\u03ba\u03bf\u03c0\u03bf\u03cd.<\/p>\n<p style=\"text-align: justify;\">\u03a4\u03bf \u03bc\u03ac\u03b8\u03b7\u03bc\u03b1 \u03b4\u03b9\u03b1\u03ba\u03c1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c4\u03c1\u03b5\u03b9\u03c2 \u03b5\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2. \u03a3\u03c4\u03b7\u03bd \u03c0\u03c1\u03ce\u03c4\u03b7 \u03b5\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bf\u03b9 \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ad\u03c2 \u03b5\u03be\u03bf\u03b9\u03ba\u03b5\u03b9\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03bf\u03c5 SDR \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03c9\u03bd \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5, \u03b5\u03bd\u03ce \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1 \u03b1\u03bd\u03b1\u03c0\u03c4\u03cd\u03c3\u03c3\u03bf\u03c5\u03bd \u03ad\u03bd\u03b1\u03bd \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03ad\u03ba\u03c4\u03b7 \u03bc\u03b5 \u03b4\u03b9\u03b1\u03bc\u03cc\u03c1\u03c6\u03c9\u03c3\u03b7 Orthogonal Frequency Division Multiplexing (OFDM) \u03b1\u03c0\u03bb\u03ae\u03c2 \u03b5\u03b9\u03c3\u03cc\u03b4\u03bf\u03c5-\u03b5\u03be\u03cc\u03b4\u03bf\u03c5 (Single Input Single Output \u2013 SISO). \u03a3\u03c4\u03b7 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b5\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1, \u03bf\u03b9 \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ad\u03c2 \u03c5\u03bb\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c0\u03b9\u03bf \u03c3\u03cd\u03bd\u03b8\u03b5\u03c4\u03b5\u03c2 \u03b2\u03b1\u03b8\u03bc\u03af\u03b4\u03b5\u03c2 \u03c0\u03bf\u03bc\u03c0\u03bf\u03cd \u03ba\u03b1\u03b9 \u03b4\u03ad\u03ba\u03c4\u03b7, \u03b5\u03c0\u03b5\u03ba\u03c4\u03b5\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03b1\u03c1\u03c7\u03b9\u03ba\u03cc \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03ad\u03ba\u03c4\u03b7 OFDM \u03c3\u03b5 Multiple Input Multiple Output (\u039c\u0399\u039c\u039f) \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2. \u03a3\u03c4\u03b7\u03bd \u03c4\u03c1\u03af\u03c4\u03b7 \u03b5\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1, \u03bf\u03b9 \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ad\u03c2 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03c5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03c3\u03b5\u03c2 \u03bf\u03bb\u03bf\u03ba\u03bb\u03b7\u03c1\u03c9\u03bc\u03ad\u03bd\u03b5\u03c2 \u03bb\u03cd\u03c3\u03b5\u03b9\u03c2 \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03bf\u03cd \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc \u03b4\u03af\u03ba\u03c4\u03c5\u03bf 4G.<\/p>\n<h3>\u03a0\u03b5\u03c1\u03b9\u03b5\u03c7\u03cc\u03bc\u03b5\u03bd\u03b1<\/h3>\n<ul>\n<li>\u0395\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 1:\n<ul>\n<li>\u0395\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c3\u03c4\u03bf Software Defined Radio (SDR),\n<ul>\n<li>\u0391\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 SDR (\u0399\u03b4\u03b1\u03bd\u03b9\u03ba\u03ae, \u03a1\u03b5\u03b1\u03bb\u03b9\u03c3\u03c4\u03b9\u03ba\u03ae \u03ba.\u03b1.,) \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 SDR, \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03c9\u03bd \u03c5\u03c0\u03bf\u03c3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03c4\u03bf\u03c5 SDR \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03ad\u03ba\u03c4\u03b7.<\/li>\n<li>\u0395\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c3\u03c4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc SDR\u03c4\u03c9\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03b1\u03ba\u03ce\u03bd \u03b1\u03c3\u03ba\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c7\u03c1\u03ae\u03c3\u03b7\u03c2.<\/li>\n<li>\u0393\u03bd\u03c9\u03c3\u03c4\u03b9\u03ba\u03ac \u03a1\u03b1\u03b4\u03b9\u03bf\u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 (Cognitive Radios) \u03ba\u03b1\u03b9 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03cc\u03c2 \u03b4\u03b9\u03b1\u03bc\u03bf\u03b9\u03c1\u03b1\u03c3\u03bc\u03cc\u03c2 \u03c6\u03ac\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2.<\/li>\n<\/ul>\n<\/li>\n<li>\u03a3\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2, \u03a6\u03b1\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u0391\u03bd\u03af\u03c7\u03bd\u03b5\u03c5\u03c3\u03b7\n<ul>\n<li>\u0394\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ce\u03bd \u03c3\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03b7\u03bc\u03b9\u03c4\u03cc\u03bd\u03bf\u03c5, \u03c4\u03b5\u03c4\u03c1\u03b1\u03b3\u03c9\u03bd\u03b9\u03ba\u03bf\u03cd \u03c0\u03b1\u03bb\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03b7 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b1 \u03c6\u03b9\u03bb\u03c4\u03c1\u03b1\u03c1\u03af\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03b5 \u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03c1\u03c5\u03b8\u03bc\u03bf\u03cd \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2.<\/li>\n<li>\u0392\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03b8\u03b5\u03c9\u03c1\u03af\u03b1\u03c2 \u03b1\u03bd\u03af\u03c7\u03bd\u03b5\u03c5\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03ba\u03c4\u03af\u03bc\u03b7\u03c3\u03b7\u03c2, \u03c3\u03c4\u03b1\u03c4\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc\u03c2 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03c3\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2, \u03b1\u03bd\u03b9\u03c7\u03bd\u03b5\u03c5\u03c4\u03ae\u03c2 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7\u03c2 \u03c0\u03b9\u03b8\u03b1\u03bd\u03bf\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2\/Bayesian \u03ba.\u03b1.<\/li>\n<li>\u0395\u03bd\u03b5\u03c1\u03b3\u03b5\u03b9\u03b1\u03ba\u03cc\u03c2 \u03b1\u03bd\u03b9\u03c7\u03bd\u03b5\u03c5\u03c4\u03ae\u03c2, Matched filter, \u03b1\u03bd\u03b9\u03c7\u03bd\u03b5\u03c5\u03c4\u03ae\u03c2 \u03c4\u03c1\u03ac\u03c0\u03b5\u03b6\u03b1\u03c2 \u03c6\u03af\u03bb\u03c4\u03c1\u03c9\u03bd<\/li>\n<\/ul>\n<\/li>\n<li>\u03a5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03ad\u03ba\u03c4\u03b7 QPSK \u03bc\u03b5 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03bf\u03cd.\n<ul>\n<li>\u0391\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03c9\u03c4\u03ae\/\u03b1\u03c0\u03bf\u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03c9\u03c4\u03ae OFDM.<\/li>\n<li>\u0395\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c0\u03b9\u03bb\u03cc\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c0\u03c1\u03bf\u03bf\u03b9\u03bc\u03af\u03c9\u03bd \u03c3\u03c5\u03bc\u03b2\u03cc\u03bb\u03c9\u03bd \u2013 \u03a3\u03c5\u03b3\u03c7\u03c1\u03bf\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2.<\/li>\n<li>\u0391\u03bd\u03af\u03c7\u03bd\u03b5\u03c5\u03c3\u03b7 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.<\/li>\n<li>\u0395\u03ba\u03c4\u03af\u03bc\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b5\u03be\u03b9\u03c3\u03bf\u03c1\u03c1\u03cc\u03c0\u03b7\u03c3\u03b7 \u03c1\u03b1\u03b4\u03b9\u03bf\u03b4\u03b9\u03b1\u03cd\u03bb\u03bf\u03c5.<\/li>\n<li>\u03a5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03c3\u03b5 MATLAB \u03ae C++.<\/li>\n<li>\u0395\u03ba\u03c0\u03bf\u03bc\u03c0\u03ae\/\u039b\u03ae\u03c8\u03b7 \u03c3\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03bc\u03b5 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac SDR \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u2013 \u0391\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u0395\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 2:\n<ul>\n<li>\u0395\u03c0\u03ad\u03ba\u03c4\u03b1\u03c3\u03b7 \u03c3\u03b5 \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 MIMO\n<ul>\n<li>\u03a5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 MIMO \u03c3\u03c4\u03bf \u03c5\u03bb\u03b9\u03ba\u03cc SDR.<\/li>\n<\/ul>\n<\/li>\n<li>\u0394\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03ae \u03bb\u03ae\u03c8\u03b7\n<ul>\n<li>\u0391\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03ae\u03c2 \u03bb\u03ae\u03c8\u03b7\u03c2 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae (selection diversity).<\/li>\n<li>\u0391\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03ae\u03c2 \u03bb\u03ae\u03c8\u03b7\u03c2 \u03bc\u03b5 Maximum Ratio Combining (MRC).<\/li>\n<\/ul>\n<\/li>\n<li>\u039c\u03ad\u03b8\u03bf\u03b4\u03bf\u03c2 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b9\u03ba\u03ae\u03c2 \u03b5\u03ba\u03c0\u03bf\u03bc\u03c0\u03ae\u03c2.\n<ul>\n<li>\u03a7\u03c9\u03c1\u03bf\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03bc\u03c0\u03bb\u03bf\u03ba \u03ba\u03c9\u03b4\u03b9\u03ba\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 (Space Time Block Coding) \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf Alamouti.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u0395\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 3:\n<ul>\n<li>\u03a5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03bf\u03cd \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03bc\u03b5 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c5\u03c0\u03b1\u03c1\u03c7\u03cc\u03bd\u03c4\u03c9\u03bd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03bf\u03cd \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 (\u03c0.\u03c7. Open Air Interface).<\/li>\n<li>\u0395\u03be\u03bf\u03b9\u03ba\u03b5\u03af\u03c9\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 4G. \u03a0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03cc\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b1\u03bd\u03ac\u03b8\u03b5\u03c3\u03b7 \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03ce\u03bd \u03c0\u03cc\u03c1\u03c9\u03bd.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u03a3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03a3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b5\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03ba\u03b1\u03b9 \u03b5\u03bc\u03b2\u03ac\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ce\u03bd \u03c3\u03b5 \u03c0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ac \u03b8\u03ad\u03bc\u03b1\u03c4\u03b1 \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2 \u03c0\u03bf\u03bc\u03c0\u03bf\u03b4\u03b5\u03ba\u03c4\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03b1\u03c3\u03c5\u03c1\u03bc\u03ac\u03c4\u03c9\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 Software Defined Radio (SDR). \u03a3\u03c4\u03bf \u03bc\u03ac\u03b8\u03b7\u03bc\u03b1, \u03bf\u03b9 \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ad\u03c2 \u03b8\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b5 \u03b8\u03ad\u03c3\u03b7 \u03bc\u03ad\u03c3\u03c9 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b5\u03ba\u03c0\u03ad\u03bc\u03c8\u03bf\u03c5\u03bd \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03ac \u03c3\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ce\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ce\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[111,146],"tags":[],"_links":{"self":[{"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/posts\/3295"}],"collection":[{"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/comments?post=3295"}],"version-history":[{"count":11,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/posts\/3295\/revisions"}],"predecessor-version":[{"id":4881,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/posts\/3295\/revisions\/4881"}],"wp:attachment":[{"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/media?parent=3295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/categories?post=3295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masters.ds.unipi.gr\/dcomms\/wp-json\/wp\/v2\/tags?post=3295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}