Why cell phone jammer has not good effect on CDMA?
CDMA stands for Code Division Multiple Access, which is a branch of the digital technology, a new and
sophisticated wireless communications technology developed on spread-spectrum communication
technology. The principle of CDMA technology is based on spread spectrum technology, that is modulate the
transmitted data with a certain signal bandwidth through a high-speed pseudo code which the bandwidth is
larger than signal bandwidth, expand the original data signal bandwidth, and then transmit after the carrier
modulation. Receiver using the same pseudo code, and receive the signal bandwidth, change the broadband
signal to the narrowband signal of the original data, to achieve the communication.
Mobile communication system has many kinds of classification. For example, according to the nature of the
signal, it can be divided into simulate, digital; According to the modulation methods, it can be divided into
frequency modulation, phase modulation, amplitude modulation; According to the multiple connection
methods, it can be divided into frequency division multiple access (FDMA), time division multiple access
(TDMA) and Code Division Multiple Access (CDMA). Because CDMA uses code division multiple access
technology, it has a strong anti-jamming ability, so it is a little difficult to be jammed by mobile phone
jammer, the effect it not very good.
Principle of mobile phone jammer
Notes of install mobile phone jammer