Page 63 - 捷運技術 第28期
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(VCC)
CBTC
(PC Base)
[12]
CBTC
(Signal S) (Noise N)
(Gain G) [17]
2
(S/N) out 3/ (S/N) in G(S/N) in
(S/N) out
(S/N) in
G
ATC
(PN Code)
( )
CBTC
(Spread Spectrum) 40
100~300KHz
(Federal Communications Commission
FCC) 900MHz~2400MHz [6]
GSM CDMA WCDMA OFDMA
GSM900 890~960MHz GSM1800 1710~1880MHz
CDMA WCDMA OFDMA 800MHz 10GHz
CBTC
