Results 301 to 310 of about 3,423,847 (360)

An investigation of underground monitoring and communication system based on radio waves attenuation using ZigBee

, 2014
M. A. Moridi, Y. Kawamura, M. Sharifzadeh, E. Chanda, H. Jang   +4 more
semanticscholar   +1 more source

The Propagation of Radio Waves Over the Earth

, 1926
A. H. Taylor, E. Hulburt
semanticscholar   +1 more source

Radio waves in the ionosphere

, 1962
K. Budden, H. Chang
semanticscholar   +1 more source

A survey of spectrum sensing algorithms for cognitive radio applications

IEEE Communications Surveys and Tutorials, 2009
Hüseyin Arslan
exaly  

Radio Waves and Matter

Scientific American, 1948
openaire   +2 more sources

Generation of OAM radio waves using circular time-switched array antenna

, 2012
A. Tennant, B. Allen
semanticscholar   +1 more source

A Survey on Radio Resource Allocation in Cognitive Radio Sensor Networks

IEEE Communications Surveys and Tutorials, 2015
Ayaz Ahmad, Sadiq Ahmad, Mubashir Husain Rehmani   +2 more
exaly  

Resource Allocation Techniques in Cooperative Cognitive Radio Networks

IEEE Communications Surveys and Tutorials, 2014
Muhammad Naeem, Alagan Anpalagan
exaly  

Recent Advances in Cloud Radio Access Networks: System Architectures, Key Techniques, and Open Issues

IEEE Communications Surveys and Tutorials, 2016
Mugen Peng, Xuelong Li
exaly  

Radio Waves

2018
openaire   +1 more source