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Wireless Communication Technologies

Spread spectrum communications were originally developed for military purposes to capitilize on their desirable antijam (AJ) and low probability of intercept (LPI) properties. Since 1980s and early 1990s, though, application of the same in civilian communications has been worked upon. CDMA, based on spread spectrum communications technology, has been recognized as a viable alternative to FDMA and TDMA. The development of 2G (e.g. IS-95) and 3G (e.g. cdma2000) CDMA cellular systems is consequence of this.