Wireless communication systems 140 Mobile communication systems 34 Design and construction 24 Wireless LANs 19 Equipment and supplies 11 Roaming (Telecommunication) 11 Antennas (Electronics) 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 Wireless communication systems in medical care 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 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