CDMA ߿ Ư¡ ϳ ũ ű ִٴ ̴.
ũ ű ð() ִ ȣ и ִ ű⸦ϴ CDMA 뿪Ȯ ؼ ִ Ư̴.
ĸ ̿Ͽ Ҷ ǰ ִ ߿ ū ִ ߰ο ̵̴. ο ٸ η ű ȣ (ð ) ؼ ϴ ̴.
̷ ȣ ũ⸦ ҽŰǷ C/I ȭ ۿ Ų. ð ȣ (ISI:Inter-symbol Interference) Ų.
밳 ĸ ̿ ŹĿ ̹Ƽ ̿Ͽ غϰ ð ð ϴ ȭ(Equalizer) ̿Ͽ ISḬ ִ.
CDMA ũ ű⸦ ִ ڴ.<> ִ ó ߰ο ؼ ű 3 η, 3 ȣð ű ߴٰ . ̶ 1 κ 2ȣ 0.5chip(⼭ chip Ȯڵ Ʈ Ͽ Ѵ.QCDMA Ȯӵ 1.2288Mbps̹Ƿ chip ð 0.814uS̴)ð̸ ְ3ȣ 2chip ð ִٰ .<>⼭ űⰡ 1ȣ ⸦ ߾ Ȯ Ѵٸ 2, 3ȣ Ⱑ ʱ Ȯ ʴ´. ̹ ѹٿͰ Ⱑ ʴ ȣ ٸ ȣ, Ǵ ٸ ڵ带 ѰͰ ̴. ȣ 3 ٸ ð ߴµ ߿ 1ȣ Ȯ Ͽ ȣ Ҽ ٸ η ȣ Ȯ ʾ ġ 3 ȣ 1ȣ Ͱ.<> ⸦ 1ȣ ſ 2chipŭ ־ 3 ߸ ̹ 3ȣ Ҽ ִ ̴.<> CDMA ð ŵǾ ȣ νϹǷ ġ ð ̹ƼͰ ȿ ִ ̴. ̿ ٸ (Ǵ ð ) ȣи ִ ̷ ű⸦ ũ ű Ѵ.<> °ó 1 2 ð ó νȣl ð ̰ 1chipª ũ ű ȣи Ƿ ̶ ȣ ġ ȴ.̵ ȯ(ũμ:ݰ 5 ~ 20Km Ǵ ) Ÿ Ư 2uS 3uS ˷ Ƿ ̷ ȯ濡 ũ ű ū ȿ ִ. ũμ ȯ̳ ȯ濡 ð 0.2uS̹Ƿ ū ȿ . ȯ濡 ũ ű ȿ ؼ Ȯ 뿪50MHz̻ Ǿ ̴.<≯ ̿Ͽ <2-8> ִ ó (Correlator) ̿Ͽ ũ ű⸦ Ҽ ִ. ̷ ũ ִ ű⸦ ̵ 3, 4 ð ȣ ϴ ܿ Ʈ ڵÿ ٸ ȣ ÿ ϴ ȴ.
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