Wireless communication systems Mobile communication systems 34 Design and construction 23 Wireless LANs 19 Roaming (Telecommunication) 11 Antennas (Electronics) 10 Equipment and supplies 10 IEEE 802.16 (Standard) 10 Computer networks 9 Wireless metropolitan area networks 9 Broadband communication systems 8 Wireless sensor networks 8 Mobile computing 7 Security measures 7 Standards 7 Routing protocols (Computer network protocols) 6 Code division multiple access 5 Cognitive radio networks 5 Management 5 Orthogonal frequency division multiplexing 5 Quality control 5 Sensor networks 5 Signal processing 5 IEEE 802.11 (Standard) 4 Metal oxide semiconductors, Complementary 4 Ad hoc networks (Computer networks) 3 Energy consumption 3 Frequency synthesizers 3 Local area networks (Computer networks) 3 Long-Term Evolution (Telecommunications) 3