System and method for wireless channel sensing

Details System and method for wireless channel sensing System and method for wireless channel sensing

2007-03-02

2011-12-13

Afshar, Kamran (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C455S067110, C455S423000

Reexamination Certificate

active

08077676

ABSTRACT:
System and method for wireless channel sensing. According to an embodiment, the present invention provides a method of determining band availability for a WRAN. The method includes receiving wirelessly analog signals within a predetermined range of frequencies. The method also includes converting the analog signals to digital signals. The digital signals are characterized in a frequency domain. The method additionally includes determining a plurality of signal strength levels associated with the digital signals at a plurality of frequencies. Furthermore, the method includes comparing the plurality of signal strength levels to reference levels at the plurality of frequencies. Moreover, the method includes determining band availability for wireless communication at the predetermined range of frequencies.

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Chang, S-Y., et al., “Waveform Modulated WRAN System,” IEEE P802.22 Wireless RANs, Nov. 11, 2007, doc.: IEEE 802.22-05/0107r0.

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