What is the frequency band for IS-95 CDMA system?
The IS-95 CDMA system operates in the same frequency band as the AMPS using frequency division duplex (FDD) with 25 MHz in each direction. * The uplink (mobile to base station) and downlink (base station to mobile) bands use frequencies from 869 to 894 MHz and from 824 to 849 MHz, respectively.
IS-95 a standard CDMA?
Interim Standard 95 (IS-95) was the first ever CDMA-based digital cellular technology. It was developed by Qualcomm and later adopted as a standard by the Telecommunications Industry Association in TIA/EIA/IS-95 release published in 1995. CDMA permits several radios to share the same frequencies.
IS-95 CDMA radio channel supports up to different users channel?
There can be up to 32 Access Channels on the IS-95 reverse link for each Paging Channel on forward link. Each AC uses the same PN but they are time shifted to enable the mobile to be uniquely identified. Data is sent at 4800 bps in a 20 mS time frame so that each frame contains 96 bits.
IS-95 a frequency band?
The IS-95 channel occupies 1.25 MHz within this band, the rest of which is occupied by other cellular services such as AMPS. Of the 64 available orthogonal channels (ie. channels which have minimum mutual interference), one is assigned to the pilot channel and one to the synchronization channel.
What IMT 2000?
International Mobile Telecommunications
International Mobile Telecommunications for the year 2000 (IMT-2000) is a worldwide set of requirements for a family of standards for the 3rd generation of mobile communications. The IMT-2000 “umbrella specifications” are developed by the International Telecommunicatons Union (ITU).
IS-95 CDMA power controlled?
As specified in the IS-95 standards, mobile acts when it wants to get into the system, it sends a signal called access. In CDMA, each user’s transmission power is allocated by the control power to achieve the same power (Pr) which is received by the base station/BTS with access probe with low power.
IS-95 specified for reverse link?
IS-95 is specified for reverse link operation in _________ band. Explanation: IS-95 is specified for reverse link operation in the 824-849 MHz band and 869-894 MHz for the forward link. The PCS version of IS-95 has also been designed for international use in the 1800-2000 MHz bands.
IS-95 is has forward link operation in which band?
IS-95 reverse link frequency band is 824-849MHz and forward link frequency band is 869-894MHz. A forward and reverse channel pair is separated by 45MHz for cellular band operation.
What’s the difference between IS-95 and CDMA?
The CDMA or code division multiple access system used for IS-95 is very different to other multiple access schemes used in previous cellular systems. However it offers a number of advantages and as a result has been widely used in many cellular technologies.
Is the IS-95 a CDMA2000 or 1x EV DO?
IS-95 itself evolved into the variety of cdma2000 schemes including 1x, 1x ev-do, and the plans were ultimately to migrate onto a 4G system known as UMB – Ultra-Mobile Broadband. However IS-95 proved to be a winner in many areas of the globe, particularly in the Americas and the Far East.
Which is the core of the CDMA2000 standard?
CDMA2000 1X (IS-2000), also known as 1x and 1xRTT, is the core CDMA2000 wireless air interface standard.
What kind of network does IS-95 use?
Networks that utilize IS-95 CDMA 10 air interface and the ANSI-41 network protocol are known as cdmaOne networks. IS-95 networks use one or more 1.25 MHz carriers and operate within the 800 and 1900 MHz frequency bands.