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In multi-channel ad hoc
networks, spectrum resource should be efficiently utilized to
accommodate communications. Current wireless LAN/PAN
technologies usually use the ISM 2.4GHz band. So for different
wireless devices, spectrum usage must be coordinated to reduce
the interference. We propose to setup a Common Spectrum
Coordination Channel (CSCC) to manage the radio resources. The
proposed protocol is "policy neutral" in the sense that it can
accommodate various different spectrum etiquette policies
which allocate radio resources (frequency, power, time) in a
fair and spectrally efficient manner. These policies
(implemented as algorithms operating above the CSCC) can thus
be customized to meet the needs of different application
scenarios (e.g. private indoors, public outdoors,
mission-critical, etc.) and regions of the world, while also
making it possible to evolve with future improvements in
spectrum usage algorithms.
In the spectrum measurement
part, we are designing a spectrum sensor to do the
measurement. The sensor includes a controller and two smart
antennas. The controller includes a computer, two spectrum
analyzers as well as some smart antenna digital signal
processes boards. It controls two smart antennas which are
located at two corners of the space respectively. By
coordinating the beams of the two antennas, the spectrum
sensor can make the beams of the two smart antenna
intercrosses at a specific point in the space. By combining
channel information basing on channel estimation, we can get
the real-time power spectrum of any point in the space.
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