CDMA is Code-Division Multiple Access abbreviation, full known as Code Division Multiple Access, is a more advanced digital interface technology, which is characterized by a h…igh frequency of utilization, mobile low power consumption, good quality voice calls. 2. Compared with GSM phones, CDMA mobile phone has the following advantages: First, the transmission power is extremely small, so conversation is not only less radiation, but also longer battery life mobile phones..
Second, the use of advanced soft-switching technology allows mobile phone is not GSM phones are dropped..
Third, better call quality, almost no noise when making a call, in the case of large background noise, you can also get a better call quality..
Fourth, a high put-through rate. As military interference from CDMA systems, and the signal occupy the entire band, almost an ordinary narrow-band modulation efficiency of seven times, so for the same bandwidth, CDMA system is the GSM system capacity of 4 to 5 times the extent of its mesh-plug a significant decrease in Therefore, uptake rates are much higher. 3. Ordinary GSM and analog mobile phone power 600 milliwatts under the general control, while the CDMA system, the maximum is only 200 mW transmit power, general power can be controlled at 0:00 call a few milliwatts, its radiation is negligible, there is no health adverse effects. As the base station and mobile transmit power reduction, so handset talk-time will be greatly extended battery life phone will also be extended to protect the environment played a role, it is called the "green phone.". (MORE)