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Code Division Multiple Access Prepared by: Christina Chiu Mar 24, 2004
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Spread Spectrum Technique ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Direct Sequence Spread Spectrum  ,[object Object],[object Object],[object Object],[object Object],[object Object]
System Block Diagram
Spreading & Despreading ,[object Object]
Spreading & Despreading
CDMA ,[object Object],[object Object],[object Object],[object Object],[object Object]
Demodulation (Correlator)
2G: IS-95A (1995) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
2G: IS-95A (1995) 8~13 kbps Speech Rate Up to 14.4 kbps Data Rate 1.25 Mbps (chip rate) Channel Bit Rate 600 mW Maximum Tx Power 64 Number of Channel BPSK/QPSK Modulation Scheme 1.25 MHz Channel Separation 824-849 MHz Downlink Frequency 869-894 MHz Uplink Frequency CDMA Multiple Access IS-95, ANSI J-STD-008 Standard
2.5G: IS-95B (1998) ,[object Object],[object Object],[object Object],[object Object]
3G Technology ,[object Object],[object Object],[object Object],[object Object],[object Object]
3G Specficiations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3G: CDMA2000 (2000) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3G: CDMA2000 Spreading Codes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3G: W-CDMA (2000) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3G: W-CDMA Spreading Codes  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
4G Technology (2010) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MC-CDMA
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Code division multiple access