Methods and apparatus for detecting a cellular digital packet da

Details Methods and apparatus for detecting a cellular digital packet da Methods and apparatus for detecting a cellular digital packet da

1993-09-14

1996-11-12

Coles, Edward

Pulse or digital communications

Testing

375340, 375341, 375354, 455132, 455133, H04B 346, H04B 104, H03D 100, H04L 700

Patent

active

055747507

ABSTRACT:
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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