In this proposal, a system concept is suggested for the IEEE802.22 WRAN standard. A set of waveforms are suggested for WRAN systems. In these systems, one TV channel frequency band is divided into 16 subbands each of which has its own waveform. In the time domain, these waveforms are added and transmitted. Multiple access schemes are suggested by applying orthogonal codes in the frequency domain.
These waveforms are generated by utilizing full digital processing in this proposal.
Sensing and dynamic frequency selection (DFS) schemes using FFTs are proposed.
These schemes are evaluated by simulation.