1. Main Features Of IS-95 (cdmaone)
Modulation is performed using DSSS.
Employs variable rate coders.
Powerful low rate forward error-correcting codes.
Fast power control is employed to over come the near-far problem.
Soft handoff is employed.
Qualcomm code excited linear predictive (QCELP): 13.4 kbps 1

2. Frequency and Channel Spec
Reverse: MHz, forward: MHz; PCS version MHz
Data rate 9.6kb/s; chip rate Mchips/s, spreading factor 128.
Power Control:
Close-loop/open-loop
Rake receiver;
Soft handoff 2

3. Forward CDMA channel 3

4. Spec Convolution code ½. Repetition circuit depending on speech
Block interleaver
Long PN sequence: 4

5. Power Control
Open Loop
Close Loop 5

6. Orthogonal Covering and modulation
Walsh function: page 574
Quadrature modulation 6

7. Uplink 7

8. Reverse Link Spec 8

9. CT2
CT2 is a cordless telephony standard that was used in the early nineties to provide short-range proto-mobile phone service in some countries in Europe. It is considered the precursor to the popular DECT system. 9

10. DECT
Digital Enhanced (formerly European) Cordless Telecommunications is an ETSI standard for digital portable phones, commonly used for domestic or corporate purposes. DECT can also be used for wireless data transfers. DECT is recognised by the ITU as
fullfilling the IMT-2000
requirements and thus
qualifies as a 3G system,
as a part of the IMT-2000
group of technologies, 10

11. DECT functional concept
Portable handset
Radio fixed part
Cordless controller
Network-specific
interface unit
Supplementary
services 11

12. DEC spec 12