Wireless communication systems 122 Mobile communication systems 25 Design and construction 22 Wireless LANs 19 Equipment and supplies 11 Roaming (Telecommunication) 11 Antennas (Electronics) 10 IEEE 802.16 (Standard) 9 Wireless metropolitan area networks 9 Wireless sensor networks 8 Broadband communication systems 7 Computer networks 7 Standards 7 Wireless communication systems in medical care 7 Security measures 6 Cognitive radio networks 5 Management 5 Mobile computing 5 Orthogonal frequency division multiplexing 5 Routing protocols (Computer network protocols) 5 Sensor networks 5 Signal processing 5 Human-computer interaction 4 IEEE 802.11 (Standard) 4 Metal oxide semiconductors, Complementary 4 Ad hoc networks (Computer networks) 3 Bluetooth technology 3 Energy consumption 3 Frequency synthesizers 3 Long-Term Evolution (Telecommunications) 3