Methods and apparatus for detecting cellular digital packet...

Details Methods and apparatus for detecting cellular digital packet... Methods and apparatus for detecting cellular digital packet...

H - Electricity

04

M

H04M 11/06 (2006.01) H04L 5/00 (2006.01) H04L 12/56 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2394981

Disclosed herein are methods and apparatus for detecting the presence of a CDPD carrier in a channel of a cellular system (although the invention is broadly applicable to detecting a specific kind of carrier associated with an "overlay" system, wherein an "overlay" system is one that shares the frequency allocation of another system on a non-cooperating basis). This specification describes a spectral estimation technique for detection of a CDPD carrier. In addition, this specification describes an MMSE (minimum mean-squared error) method that improves on the spectral estimation method.

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