What type of network is cdma?

cdma is Telecom’s 2G network type. It is a network standard launched by telecom operators in the past few years. When domestic 2G networks began to become popular, China Mobile and China Unicom used GSM 2G networks. Telecom uses CDMA1X. If you use a telecom card in your mobile phone, and it displays a 2G signal, it is using the CDMA network.

#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What type of network is cdma?

CDMA is Telecom’s 2G network. It is a network standard launched by telecom operators in the past few years. When domestic 2G networks began to become popular, China Mobile and China Unicom used GSM 2G network, and China Telecom uses CDMA1X. If you use a telecommunications card in your mobile phone, and it displays a 2G signal, it uses the CDMA network.

First of all, CDMA belongs to China Telecom. It belongs to neither China Unicom nor China Mobile. It is a standard exclusively used by China Telecom’s 2G network. The advantage is that the call quality is very good, and it has the function of noise shielding and confidentiality. It is very high and the radiation is also very low, so it is safe, environmentally friendly, and relatively fast.

Code Division Multiple Access

The technical principle of CDMA is based on spread spectrum technology, that is, the information data with a certain signal bandwidth that needs to be transmitted uses a high-speed pseudo-random code with a bandwidth much larger than the signal bandwidth. The sequence (PN) is modulated so that the bandwidth of the original data signal is expanded, and then modulated by the carrier and sent out.

The receiving end uses exactly the same pseudo-random code to perform relevant processing on the received broadband signal, and convert the broadband signal into a narrowband signal of the original information data, that is, despreading, to achieve information communication. CDMA code division multiple access technology fully meets the requirements of large capacity, high quality, comprehensive services, soft handover and other requirements required by modern mobile communication networks, and is being favored by more and more operators and users.

For more related knowledge, please visit the FAQ column!

The above is the detailed content of What type of network is cdma?. For more information, please follow other related articles on the PHP Chinese website!