US5329549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal processing method for a GPS receiver
Assignee: Pioneer Corp
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Filing: 1993-08-02
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Granted: 1994-07-12
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Expires: 2013-08-02
Abstract
Abstract A method for searching a carrier frequency and code phase of a signal received by a GPS receiver. The method includes steps of: quantizing the received signal; sampling the quantized signal at a first speed by a carrier frequency generated in the receiver; storing the samples in memory at a first speed; reading the samples from memory at a second speed; and determining the correlation between a code of the carrier frequency generated in the receiver and the received signal. The second speed is faster than the first speed.
Inventors
- 👤 Kenichiro Kawasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7073; H04B1/7085; G; G01; G01S; G01S19/00; G01S19/01; G01S19/13; G01S19/24; G01S19/29
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A method for searching a carrier frequency and code phase of a signal received by a GPS receiver, comprising steps of: quantizing the received signal; sampling the quantized signal at a first speed by a carrier frequency generated in the receiver; storing the samples in a memory at said first speed; reading the samples from the memory at a second speed faster than said first speed; and determining a correlation between a code of the received signal from the samples read from the memory and a code generated in the receiver.
Claim 2
Independent Claim
91 words
A method for searching a carrier frequency and code phase of a signal received by a GPS receiver, comprising steps of: quantizing the received signal; sampling the quantized signal at a first speed by a carrier frequency generated in the receiver; storing the samples in a memory at said first speed; reading the samples from the memory at a second speed faster than said first speed; and determining a correlation between a code of the received signal from the samples read from the memory and a code generated in the receiver.
Claim 3
Dependent Claim
26 words
A method for searching a carrier frequency and code phase according to claim 1, wherein said second speed is ten times faster than said first speed.
References Cited (Backward Citations)
US5101416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |