US5966402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detecting pilot signals and subscriber
Assignee: Sony Corp
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Filing: 1996-11-18
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Granted: 1999-10-12
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Expires: 2016-11-18
Abstract
Abstract A pilot signal detection method, a pilot signal detection apparatus and a subscriber in which the timing of a pilot signal of a neighbor base station is detected correctly and efficiently for improving the quality of communication of a mobile station. Partial correlation is taken of a pilot signal of an arbitrary base station within a first range of correlation. The pilot signal for which the result of the partial correlation has exceeded a first threshold becomes a pilot candidate signal for detection. Partial correlation is then taken of the pilot signal of the pilot candidate signal within a range of correlation broader than the first range of correlation. The pilot signal for which the result of the partial correlation has exceeded a second threshold becomes a pilot detection signal.
Inventors
- 👤 Katsuya Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:38
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B2001/70724
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A pilot signal detection method in which spread-spectrum signals in a code division multiple access system are received from a plurality of base stations forming respective received spread-spectrum signals and a pilot signal of an arbitrary base station from the received spread-spectrum signals from the plurality of base stations is detected, comprising the steps of: taking a first partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation to a first threshold value; taking a second partial correlation of the pilot candidate signal for detection within a second range of correlation broader than the first range of correlation; and selecting a pilot signal based on a comparison between a result of the second partial correlation and a second threshold value, whereby the selected Dilot signal becomes a pilot detection signal.
Claim 2
Dependent Claim
155 words
A pilot signal detection method in which spread-spectrum signals in a code division multiple access system are received from a plurality of base stations forming respective received spread-spectrum signals and a pilot signal of an arbitrary base station from the received spread-spectrum signals from the plurality of base stations is detected, comprising the steps of: taking a first partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation to a first threshold value; taking a second partial correlation of the pilot candidate signal for detection within a second range of correlation broader than the first range of correlation; and selecting a pilot signal based on a comparison between a result of the second partial correlation and a second threshold value, whereby the selected Dilot signal becomes a pilot detection signal.
Claim 3
Dependent Claim
184 words
A pilot signal detection apparatus in which spread-spectrum signals in a code division multiple access system are received from a plurality of base stations forming received spreads-spectrum signals and a pilot signal of an arbitrary base station is detected from the received spread-spectrum signals from the plurality of base stations, comprising: first search means for taking a partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; detection candidate decision means for selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation from the first search means to a first threshold value; second search means for taking a partial correlation of the pilot candidate signal for detection obtained by the detection candidate decision means within a second range of correlation broader than the first range of correlation; and detection decision means for setting a pilot signal selected on a basis of comparison between a result of the partial correlation from the second search means and the second threshold value, whereby the set pilot signal is a pilot detection signal.
Claim 4
Dependent Claim
184 words
A pilot signal detection apparatus in which spread-spectrum signals in a code division multiple access system are received from a plurality of base stations forming received spreads-spectrum signals and a pilot signal of an arbitrary base station is detected from the received spread-spectrum signals from the plurality of base stations, comprising: first search means for taking a partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; detection candidate decision means for selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation from the first search means to a first threshold value; second search means for taking a partial correlation of the pilot candidate signal for detection obtained by the detection candidate decision means within a second range of correlation broader than the first range of correlation; and detection decision means for setting a pilot signal selected on a basis of comparison between a result of the partial correlation from the second search means and the second threshold value, whereby the set pilot signal is a pilot detection signal.
Claim 5
Dependent Claim
221 words
A subscriber receiver in a mobile station comprising: reception means for receiving spread-spectrum signals in a code division multiple access system from a plurality of base stations; pilot signal detection means for detecting a pilot signal of an arbitrary base station from the spread-spectrum signals of the plurality of base stations received by said reception means; and demodulation means for demodulating the spread-spectrum signals received by said reception means based on the pilot signal detected by said pilot signal detection means; said pilot signal detection means including: first search means for taking a partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; detection candidate decision means for selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation from the first search means to a first threshold value; second search means for taking a partial correlation of the pilot candidate signal for detection obtained by the detection candidate decision means within a second range of correlation broader than the first range of correlation; and detection decision means for setting a pilot signal selected on a basis of a comparison between a result of the partial correlation from the second search means and the second threshold value, whereby the set pilot signal is a pilot detection signal.
Claim 6
Dependent Claim
221 words
A subscriber receiver in a mobile station comprising: reception means for receiving spread-spectrum signals in a code division multiple access system from a plurality of base stations; pilot signal detection means for detecting a pilot signal of an arbitrary base station from the spread-spectrum signals of the plurality of base stations received by said reception means; and demodulation means for demodulating the spread-spectrum signals received by said reception means based on the pilot signal detected by said pilot signal detection means; said pilot signal detection means including: first search means for taking a partial correlation of the pilot signal of the arbitrary base station within a first range of correlation; detection candidate decision means for selecting a pilot candidate signal for detection based on a comparison of a result of the partial correlation from the first search means to a first threshold value; second search means for taking a partial correlation of the pilot candidate signal for detection obtained by the detection candidate decision means within a second range of correlation broader than the first range of correlation; and detection decision means for setting a pilot signal selected on a basis of a comparison between a result of the partial correlation from the second search means and the second threshold value, whereby the set pilot signal is a pilot detection signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-11 | 2003-04-12 | 2003-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-11 | 2007-04-12 | 2007-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-11 | 2011-04-12 | 2011-10-12 | $7700.00 | Window Closed / Lapsed |