Hybrid underlay/overlay cognitive radio system with hierarchical modulation in the presence of channel estimation error.
Reza ShakerHamidreza KhakzadAbbas TaherpourTamer KhattabMazen Omar HasnaPublished in: GLOBECOM (2014)
Keyphrases
- estimation error
- spectrum sensing
- cognitive radio
- cooperative spectrum sensing
- cognitive radio networks
- cellular networks
- wireless communication
- ofdm system
- average error
- standard deviation
- multiple input multiple output
- orthogonal frequency division multiplexing
- communication systems
- error rate
- base station
- covariance matrix
- wireless systems
- channel estimation
- wireless networks
- key technologies
- multiresolution
- multi channel
- wireless mesh networks
- mobile users
- wireless channels
- step size