Code division multiple access Optical fiber communication 3 Mobile communication systems 2 Universal Mobile Telecommunications System 2 Wireless LANs 2 Wireless communication systems 2 Cell phone systems 1 Cellular telephone systems 1 Design and construction 1 Global system for mobile communications 1 Multiuser detection (Telecommunication) 1 Spread spectrum communications 1 TCP/IP (Computer network protocol) 1 Wireless Internet 1