TDMA, FDMA, and CDMA

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Frequency Hopping Spread Spectrum FH-SS signal robustness to a interferers at constant frequency Interference limited a un dwell time f f9 f8 f7 f6 f5 f4 f3 f2 f1 f0 Interferer at constant frequency t 34
Frequency Hopping Spread Spectrum Coexistence of different FH-SS signals Signal 1 Signal 2 f f9 f8 f7 f6 f5 f4 f3 f2 f1 f0 If codes are well chosen (orthogonal) No interference!! t 35
Page 1 and 2: TDMA, FDMA, and CDMA Telecomunicazi
Page 3 and 4: TDMA : Frame Structure TDMA require
Page 5 and 6: TDMA : guard times Since there are
Page 7 and 8: S Digital signal TDMA: reference tr
Page 9 and 10: () j s () t 1 0.8 0.6 0.4 0.2 0 -0.
Page 11 and 12: from the buffer () () t j sC Code g
Page 13 and 14: from the TDMA coder 1 0.8 0.6 0.4 0
Page 15 and 16: 100 50 0 -50 -100 () () t j sTX 0 0
Page 17 and 18: Frequency requency Division ivision
Page 19 and 20: S Digital signal FDMA: reference sc
Page 21 and 22: s FDMA: a case study () j () () j
Page 23 and 24: TDMA + FDMA FDMA TDMA + FDMA 23
Page 25 and 26: Code ode Division ivision Multiple
Page 27 and 28: CDMA schemes Direct Sequence CDMA (
Page 29 and 30: Direct Sequence Spread Spectrum Ori
Page 31 and 32: Received signal signal 1 Direct Seq
Page 33: Frequency Hopping Spread Spectrum T
Page 37 and 38: CDMA : the near-far problem If all
Page 39 and 40: DS-CDMA: reference scheme Front-End
Page 41 and 42: s DS-CDMA: a case study s Digital b

TDMA, FDMA, and CDMA

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