History of CDMA in INDIA .and future path ...

CDMA(Code Division Mulitple Access) is an war tested technology developed in 1940s by US military for secure communications.
but later after long time in nineties by making fundamental changes in this technology , company called Qualcomm had filed patent in US for using it as wireless communications technology for society first as a WLL (Wireless Local Loop) and later as cellular technology.
It was later standardised by ANSI and 3GPP2 , its first standard published was IS 95(Interim Standard) in 1995 ,Which is also known as IS 41 standards .

So as a US developed technology it is mainly adopted in US and afterwards Japan and some Asian countries like China , Korea with their own local modifications.

However ,In India we can say this technology came as it is in US ,and this came as a WLL (Wireless Local Loop) technology to give basic telecom services economically in Indian market which was aim of NTP 99 ( National Telecom Policy 1999) by government . However with technlogical advancement and some manipulating practices by private operators in India it was became cellular ,in 2003 with order from Indian court in one of the famous case of GSM vs CDMA operators in ,CDMA as declared as a cellular technology like GSM in India .

now in India is a having close to 150 million subscriber base for CDMA , though it is less comapred to GSM ,but it significant .

CDMA , has been mainly provided in Indian operators like BSNL ,Rcom , TTSL, MTS, Shyam Telecom .

CDMA in India has been evloved from

WLL -- Cellular technology (voice ) --- CDMA 2000 ( voice + data ) ---- Advanced CDMA + EVDO (data optimised ) Rev A, and now B ( 6.2 Mbps )

Now ,with aggressive push by Qaulcomm in chipset design their is variety of handsets and datacards are available in market , so operators are pushing it as wireless broadband technology with efficient use of spectrum , operators like Rcom and TTSL are betting big on advanced CDMA for increased voice capacity and data speed with efficient use of available spectrum , so in India CDMA will play good migration path towards LTE .