CDMA is the abbreviation of CodeDivisionMultipulAccess, which is a brand-new and mature wireless communication technology developed on the spread spectrum communication technology, a branch of digital technology. The principle of CDMA technology is based on spread spectrum technology, that is, the information data to be transmitted with a certain signal bandwidth is modulated by a high-speed pseudo-random code with a bandwidth much larger than the signal bandwidth, so that the bandwidth of the original data signal is expanded and then transmitted by carrier modulation. The receiver uses the same pseudo-random code to correlate with the received bandwidth signal, and changes the broadband signal into the narrowband signal of the original information data, that is, despreading, thus realizing information communication.
Whether to support telecom mobile phones mainly depends on whether the network standard of mobile phones is suitable for CDMA.