US3254339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for improving the signal-tonoise ratio of varying, periodicallyrecurring signals
Assignee: Hazeltine Research Inc
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Filing: 1964-04-01
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Granted: 1966-05-31
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Carl E Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:15
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
SIGNAL PROCESSING APPARATUS FOR IMPROVING THE SIGNAL-TO-NOISE RATIO OF MOVING TARGET RADAR SIGNALS COMPRISING: A SOURCE OF INPUT SIGNALS, SAID INPUT SIGNALS INCLUDING MOVING TARGER SIGNALS WHICH RECUR AT A SUBSTANTIALLY CONSTANT REPETITION RATE WITH PHASE VARIATIONS BETWEEN REPETITION PERIODS AND STATIONARY TARGET SIGNALS WHICH RECUR AT A SUBSTANTIALLY CONSTANT REPETITION RATE WITH NO PHASE VARIATIONS BETWEEN REPETITION PERIODS; MEANS FOR COMPARING THE PHASE OF INPUT SIGNALS RECEIVED DURING SUCCESSIVE RADAR REPETITION PERIODS, SAID MEANS INCLUDING A FIRST DELAY LINE FOR DELAYING RECEIVED SIGNALS FOR ONE RADAR REPETITION PERIOD AND A PHASE DETECTOR FOR COMPARING THE PHASE OF DELAYED SIGNALS RECEIVED DURING A FIRST RADAR REPETITION PERIOD WITH THE PHASE OF UNDELAYED SIGNALS RECEIVED DURING A SECOND RADAR REPETITION PERIOD, SAID PHASE DETECTOR BEING ARRANGED TO PRODUCE SUBSTANTIALLY NO OUTPUT SIGNAL INDICATIONS FOR STATIONARY TARGET SIGNALS AND TO PRODUCE OUTPUT SIGNAL INDICATIONS REPRESENTATIVE OF THE PHASE DIFFERENCE BETWEEN MOVING TARGET
Claim 2
Dependent Claim
150 words
SIGNAL PROCESSING APPARATUS FOR IMPROVING THE SIGNAL-TO-NOISE RATIO OF MOVING TARGET RADAR SIGNALS COMPRISING: A SOURCE OF INPUT SIGNALS, SAID INPUT SIGNALS INCLUDING MOVING TARGER SIGNALS WHICH RECUR AT A SUBSTANTIALLY CONSTANT REPETITION RATE WITH PHASE VARIATIONS BETWEEN REPETITION PERIODS AND STATIONARY TARGET SIGNALS WHICH RECUR AT A SUBSTANTIALLY CONSTANT REPETITION RATE WITH NO PHASE VARIATIONS BETWEEN REPETITION PERIODS; MEANS FOR COMPARING THE PHASE OF INPUT SIGNALS RECEIVED DURING SUCCESSIVE RADAR REPETITION PERIODS, SAID MEANS INCLUDING A FIRST DELAY LINE FOR DELAYING RECEIVED SIGNALS FOR ONE RADAR REPETITION PERIOD AND A PHASE DETECTOR FOR COMPARING THE PHASE OF DELAYED SIGNALS RECEIVED DURING A FIRST RADAR REPETITION PERIOD WITH THE PHASE OF UNDELAYED SIGNALS RECEIVED DURING A SECOND RADAR REPETITION PERIOD, SAID PHASE DETECTOR BEING ARRANGED TO PRODUCE SUBSTANTIALLY NO OUTPUT SIGNAL INDICATIONS FOR STATIONARY TARGET SIGNALS AND TO PRODUCE OUTPUT SIGNAL INDICATIONS REPRESENTATIVE OF THE PHASE DIFFERENCE BETWEEN MOVING TARGET
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |