CA2394981A1 - Methods and apparatus for detecting cellular digital packet data (cdpd) - Google Patents

Methods and apparatus for detecting cellular digital packet data (cdpd) Download PDF

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Publication number
CA2394981A1
CA2394981A1 CA002394981A CA2394981A CA2394981A1 CA 2394981 A1 CA2394981 A1 CA 2394981A1 CA 002394981 A CA002394981 A CA 002394981A CA 2394981 A CA2394981 A CA 2394981A CA 2394981 A1 CA2394981 A1 CA 2394981A1
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CA
Canada
Prior art keywords
cdpd
methods
packet data
detecting
digital packet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002394981A
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French (fr)
Other versions
CA2394981C (en
Inventor
George Peponides
Kumar Balachandran
Frank Quick
Keith Smith
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Cirrus Logic Inc
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Individual
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Publication date
Priority claimed from US08/121,339 external-priority patent/US5574750A/en
Application filed by Individual filed Critical Individual
Publication of CA2394981A1 publication Critical patent/CA2394981A1/en
Application granted granted Critical
Publication of CA2394981C publication Critical patent/CA2394981C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.
CA002394981A 1993-09-14 1994-09-14 Methods and apparatus for detecting cellular digital packet data (cdpd) Expired - Lifetime CA2394981C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/121,339 1993-09-14
US08/121,339 US5574750A (en) 1993-09-14 1993-09-14 Methods and apparatus for detecting a cellular digital packet data (CDPD) carrier
CA002171719A CA2171719C (en) 1993-09-14 1994-09-14 Methods and apparatus for detecting cellular digital packet data (cdpd)

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002171719A Division CA2171719C (en) 1993-09-14 1994-09-14 Methods and apparatus for detecting cellular digital packet data (cdpd)

Publications (2)

Publication Number Publication Date
CA2394981A1 true CA2394981A1 (en) 1995-03-23
CA2394981C CA2394981C (en) 2005-07-26

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ID=25678373

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002394981A Expired - Lifetime CA2394981C (en) 1993-09-14 1994-09-14 Methods and apparatus for detecting cellular digital packet data (cdpd)

Country Status (1)

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CA (1) CA2394981C (en)

Also Published As

Publication number Publication date
CA2394981C (en) 2005-07-26

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