CA2394981A1 - Methods and apparatus for detecting cellular digital packet data (cdpd) - Google Patents
Methods and apparatus for detecting cellular digital packet data (cdpd) Download PDFInfo
- 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
- Authority
- 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
Links
- 238000000034 method Methods 0.000 title abstract 5
- 230000001413 cellular effect Effects 0.000 title abstract 2
- 208000015976 Corneal dystrophy-perceptive deafness syndrome Diseases 0.000 abstract 2
- 230000003595 spectral effect Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
Landscapes
- Mobile Radio Communication Systems (AREA)
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.
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.
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 |
Family
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)
Country | Link |
---|---|
CA (1) | CA2394981C (en) |
-
1994
- 1994-09-14 CA CA002394981A patent/CA2394981C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2394981C (en) | 2005-07-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20140915 |