The general scope of this journal special issue includes, but is not limited to, the following topics:

Spectrum sensing algorithm and white space modeling

Spectrum sharing architecture and mechanism

Spectrum-efficient design

Dynamic spectrum management

Spectrum pricing, auction and trading

Game theory for dynamic spectrum access

Spectrum mobility control

Reconfigurable wireless platforms

Medium access control design for cognitive radio networks

Spectrum agile and adaptive routing

Security of wireless systems in the context of spectrum sharing

Interference analysis, measurements and statistical models of spectrum usage

Coexistence with legacy wireless systems

Novel radio architectures and antennas

Simulation tools, testbeds, hardware and software prototypes

Regulation and standardization.