Pulse or digital communications – Testing
Patent
1995-04-18
1998-02-17
Chin, Stephen
Pulse or digital communications
Testing
375316, 455 671, H04B 346, H04B 1700, H04Q 120
Patent
active
057199027
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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Balachandran Kumar
Quick R. Franklin
Smith Keith
Chin Stephen
Pacific Communication Sciences, Inc.
Phan Hai H.
Richman, III Merle W.
Stein Michael E.
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