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CDMA is the English abbreviation of Code Division Multiple Access (CodeDivisionMultipleAccess). It is a brand-new and mature wireless communication technology developed on 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 with a certain signal bandwidth to be transmitted 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, then modulated by the carrier wave and sent out.3.2. 1 The MySQL event scheduler event_scheduler is responsible for invoking events and is turned off by default. This scheduler constantly monitors whether an event is to be called. To create an event, the scheduler must be turned on.CFor example: hyperici herba, the overground part of hyperici1. Attack network broadband resources