CDMA Chipsets

CDMA Chipsets is a popular Chipsets used in 3G and 2G mobile phones manufactured by Qualcomm Inc.

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Spread spectrum in digital communications

Main articles|

* Spread spectrum
* Code-division multiple access (CDMA)

History
Hedy Lamarr
Commercial use
More...

Spread spectrum methods|

* Direct-sequence spread spectrum (DSSS)
* Frequency-hopping spread spectrum (FHSS)
* Chirp spread spectrum (CSS)
* Time-hopping spread spectrum (THSS)

CDMA schemes|

* W-CDMA
* TD-CDMA
* TD-SCDMA
* DS-CDMA
* FH-CDMA
* MC-CDMA

Major implementations|

* Space Network (NASA)
* GPS
* Galileo
* GLONASS
* Bluetooth
* Cordless phones: DECT

Cellular
EV-DO Mobile
IS-95 (aka cdmaOne)
CDMA2000 (aka IS-2000)
Also
Qualcomm
Verizon

Major concepts|

* PN (pseudorandom noise) code
* Chip
* Near–far problem
* Power spectral density (PSD)
* Process gain
* Rake receiver
* Low probability of intercept

See also
Digital communication
Modulation
Statistical multiplexing
Waveform

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