Mobile communication systems Wireless communication systems 39 Mobile computing 13 Radio 11 Design and construction 8 Fading 8 Transmitters and transmission 8 Security measures 7 Code division multiple access 6 Computer networks 6 Digital communications 6 Dissertations 6 Dissertations, Academic 6 Instant messaging 6 Long-Term Evolution (Telecommunications) 6 TCP/IP (Computer network protocol) 6 Technological innovations 6 Telecommunication 6 Antennas (Electronics) 5 Broadband communication systems 5 Cell phone systems 5 IEEE 802.16 (Standard) 5 Roaming (Telecommunication) 5 Wireless LANs 5 Cell phones 4 Design 4 Equipment and supplies 4 Multimedia systems 4 Orthogonal frequency division multiplexing 4 Packet switching (Data transmission) 4