About the CDMA Technology:
CDMA stand for (Code-Division Multiple
Access) is a channel access method used by various radio communication
technologies. It is a form of multiplexing, which allows numerous signals to
occupy a single transmission channel, optimizing the use of available bandwidth.
The technology is used in ultra-high-frequency (UHF) cellular telephone systems
in the 800-MHz and 1.9-GHz bandswidth.
In CDMA employs analog-to-digital conversion (ADC) in combination with
spread spectrum technology. Audio input is first digitized into binary elements.
The frequency of the transmitted signal is then made to vary according to a
defined pattern (code), so it can be intercepted only by a receiver whose
frequency response is programmed with the same code, so it follows exactly along
with the transmitter frequency. There are trillions of possible
frequency-sequencing codes, which enhances privacy and makes cloning difficult.
About the GSM Technology:
GSM, this stands for Global System for Mobile communications, gsm
as the world’s most widely used cell phone technology. Cell phones use a cell
phone service carrier’s GSM network by searching for cell phone towers in
the nearby area.
The origins of GSM can be traced back to 1982 when the Groupe Spécial
Mobile (GSM) was created by the European Conference of Postal and
Telecommunications Administrations (CEPT) for the purpose of designing a
pan-European mobile technology.
It is approximated that 80 percent of the world uses GSM technology when placing
wireless calls, according to the GSM Association (GSMA), which represents
the interests of the worldwide mobile communications industry. This amounts to
nearly 3 billion global people today.
Difference Between CDMA and GSM Technologies:
Here we discuss the main differences between these technologies, and keeping
track of them can be a challenge. Any individual who is looking for better usage
out of their cell phone and their network provider to have a good understanding
of what these differences are, and what they should look out for when choosing a
new smartphone device or cell phone.
Below list show the major diffrences of these Technologies.
| s.no | CDMA | GSM |
| Stands for | Code Division Multiple Access | Global System for Mobile communication |
| Storage Type | Internal Memory | SIM (subscriber identity module) Card |
| Global market share | 25% | 75% |
| Dominance | Dominant standard in the U.S. | Dominant standard worldwide except the U.S. |
| Data transfer | EVDO/3G/4G/LTE | GPRS/E/3G/4G/LTE |
| Network | There is one physical channel and a special code for every device in the coverage network. Using this code, the signal of the device is multiplexed, and the same physical channel is used to send the signal. | Every cell has a
corresponding network tower, which serves the mobile phones in that cellular
area. |
| International roaming | Less Accessible | Most Accessible |
| Frequency band | Single (850 MHz) | Multiple (850/900/1800/1900 MHz) |
| Network service | Handset specific SIM specific. | User has option to select handset of his choice |
| Security | More security is provided in CDMA technology as compared with the GSM technology as encryption is inbuilt in the CDMA.More security is provided in CDMA technology as compared with the GSM technology as encryption is inbuilt in the CDMA | less security is provided in GSM technology as compared with the CDMA technology .In terms of encryption the GSM technology has to be upgraded so as to make it operate more securely. |