Better system communication quality: Soft handover technology (connect first and then disconnect again) can overcome the problem of hard handover that is easy to drop calls. The CDMA system works on the same frequency and the same bandwidth, and it is easier to implement soft handover technology than TDMA, thus Improve communication quality; CDMA system adopts powerful error correction code soft-switching technology and rake multipath diversity receiver that determines the vocoder rate adaptive threshold technology. In CDMA system, it provides unparalleled high communication quality in TDMA system;