US3906498A
Expired / Lapsed
US
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Radar interface method and system
Assignee: Westinghouse Electric Corp
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Filing: 1973-05-24
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Granted: 1975-09-16
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Expires: 1993-05-24
Abstract
Abstract A method and system for interfacing a variable interpulse period radar system with a fixed interpulse period output device is disclosed. The radar interpulse period is varied in a predetermined manner about an average interpulse period so that the sum of a predetermined plural number of varying interpulse periods is an integral multiple of the average period. The output interpulse period may then be a fixed submultiple of the average period. Target information for multiple radar transmissions is combined by a signal summing technique to prevent loss or degradation of target detectability. In accordance with the disclosed summing technique, a current target information signal is summed with a fractional portion of previously stored target data and the sum is then stored for further use.
Inventors
- 👤 Jr John W Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:43
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/22; G01S13/225; G01S13/50; G01S13/52; G01S13/522; G01S13/524; G01S13/526; G01S13/528
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
111 words
A method for providing target information signals at a fixed data interval in a pulsed radar system which radiates with variable interpulse periods comprising the steps of: transmitting pulses of wave energy with an interpulse spacing which varies on a pulse-to-pulse basis about a predetermined average interpulse period; deriving target information signals from consecutive return pulses of the wave energy at the variable interpulse period of the radar; combining a plural number of consecutive target information signals derived from the reflected pulses of wave energy; and, utilizing the combined target information signals at a fixed data interval equal to the average interpulse period of the radar multiplied by an integer number.
Claim 2
Independent Claim
111 words
A method for providing target information signals at a fixed data interval in a pulsed radar system which radiates with variable interpulse periods comprising the steps of: transmitting pulses of wave energy with an interpulse spacing which varies on a pulse-to-pulse basis about a predetermined average interpulse period; deriving target information signals from consecutive return pulses of the wave energy at the variable interpulse period of the radar; combining a plural number of consecutive target information signals derived from the reflected pulses of wave energy; and, utilizing the combined target information signals at a fixed data interval equal to the average interpulse period of the radar multiplied by an integer number.
Claim 3
Dependent Claim
67 words
The method of claim 1 wherein the plural number of consecutive target information signals are combined by: storing a first target information signal derived from a first pulse of the wave energy returned from a target; and, summing a fractional portion of the first target information signal with a second target information signal derived from the second consecutive pulse of the wave energy returned from the target.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein the fractional portion is 7/8 .
Claim 5
Dependent Claim
30 words
The method of claim 3 wherein at least two consecutive target information signals are combined and wherein the fixed data interval is twice the average interpulse period of the radar.
Claim 6
Dependent Claim
28 words
The method of claim 1 wherein two consecutive target information signals are summed and wherein the fixed data interval is twice the average interpulse period of the radar.
Claim 7
Dependent Claim
29 words
The method of claim 1 wherein three consecutive target information signals are summed and wherein the fixed data interval is three times the average interpulse period of the radar.
Claim 8
Dependent Claim
105 words
The method of claim 6 wherein the three consecutive target information signals are combined by: storing a first target information signal derived from a first pulse of the wave energy returned from a target; summing 7/8 of the stored first target information signal with a second target information signal derived from the second conSecutive pulse of the wave energy returned from the target; storing the sum of 7/8 of the first and the second target information signals; and, summing 7/8 of the stored sum signal with a third target information signal derived from the third consecutive pulse of the wave energy returned from the target.
Claim 9
Independent Claim
156 words
A method for interfacing a pulsed radar system having a varying interpulse period with a constant frequency output device comprising the steps of: deriving target information from pulses of wave energy reflected by a target at varying intervals determined by the interpulse period of the radar, the intervals varying in accordance with a sequence wherein the sum of the intervals in consecutive groups of varying intervals each containing a like predetermined plural number of varying intervals is a constant period; combining target information derived from the reflected pulses of wave energy over at least one constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals; and, generating an output signal from the combined target information at fixed intervals each equal in length to the constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals.
Claim 10
Independent Claim
156 words
A method for interfacing a pulsed radar system having a varying interpulse period with a constant frequency output device comprising the steps of: deriving target information from pulses of wave energy reflected by a target at varying intervals determined by the interpulse period of the radar, the intervals varying in accordance with a sequence wherein the sum of the intervals in consecutive groups of varying intervals each containing a like predetermined plural number of varying intervals is a constant period; combining target information derived from the reflected pulses of wave energy over at least one constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals; and, generating an output signal from the combined target information at fixed intervals each equal in length to the constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals.
Claim 11
Dependent Claim
42 words
The method of claim 8 wherein each consecutive group of the varying intervals comprises two consecutive intervals and wherein the latent target information derived over the constant period defined by each consecutive group of two intervals is combined by exponentially weighted integration.
Claim 12
Dependent Claim
42 words
The method of claim 8 wherein each consecutive group of the varying intervals comprises three consecutive intervals and wherein the latent target information derived over the constant period defined by each consecutive group of three intervals is combined by exponentially weighted integration.
Claim 13
Dependent Claim
48 words
The method of claim 8 wherein the latent target information derived over a constant period is combined by summing the latent target information from a specific point in range with a fractional protion of previously stored data, the summation providing new stored data replacing the previously stored data.
Claim 14
Independent Claim
103 words
A system for providing target information signals at a fixed data interval in a pulsed radar system which radiates with variable periods comprising; means for transmittng pulses of wave energy with an interpulse spacing which varies on a pulse-to-pulse basis about a predetermined average interpulse period; means responsive to said deriving means for combining a plural number of consecutive target information signals derived from the reflected pulses of wave energy; and, means responsive to said combining means for utilizing the combined target information signals at a fixed data interval equal to the average interpulse period of the radar multiplied by an integer number.
Claim 15
Independent Claim
103 words
A system for providing target information signals at a fixed data interval in a pulsed radar system which radiates with variable periods comprising; means for transmittng pulses of wave energy with an interpulse spacing which varies on a pulse-to-pulse basis about a predetermined average interpulse period; means responsive to said deriving means for combining a plural number of consecutive target information signals derived from the reflected pulses of wave energy; and, means responsive to said combining means for utilizing the combined target information signals at a fixed data interval equal to the average interpulse period of the radar multiplied by an integer number.
Claim 16
Dependent Claim
48 words
The system of claim 12 wherein said combining means comprises means for summing a target information signal from a specific point in range with a fractional portion of stored data, the summing means providing the resultant sum as new stored data in place of the previously stored data.
Claim 17
Dependent Claim
64 words
The system of claim 12 wherein said combining means comprises: means for storing a first target information signal derived from a first pulse of the wave energy returned from a target; and, means for summing a fractional portion of the first target information signal with a second target information signal derived from a second consecutive pulse of the wave energy returned from the target.
Claim 18
Dependent Claim
12 words
The system of claim 14 wherein the fractional portion is 7/8 .
Claim 19
Dependent Claim
32 words
The system of claim 15 wherein two consecutive target information signals are combined by said combining means and wherein the fixed interpulse period is twice the average interpulse period of the radar.
Claim 20
Dependent Claim
28 words
The system of claim 12 wherein two consecutive target information signals are combinEd and wherein the fixed interpulse period is twice the average interpulse period of the radar.
Claim 21
Dependent Claim
29 words
The system of claim 12 wherein three consecutive target information signals are combined and wherein the fixed interpulse period is three times the average interpulse period of the radar.
Claim 22
Dependent Claim
70 words
The system of claim 18 wherein said combining means comprises: means for storing digital signals; means responsive to said storing means and said deriving means for summing 7/8 of a signal stored by said storing means with a target information signal from said deriving means; and, circuit means for applying the sum signal from said summing means to said storing means, said sampling means being responsive to said summing means.
Claim 23
Independent Claim
168 words
A system for interfacing a pulsed radar system having a varying interpulse period with an output device operable at a fixed interpulse period comprising: means for transmitting pulses of wave energy and deriving target information signals from the transmitted pulses of wave energy reflected by a target at varying intervals determined by the varying interpulse period of the radar, the intervals varying in accordance with a sequence wherein the sum of the intervals in consecutive groups of varying intervals each containing a like predetermined plural number of varying intervals defines a constant interpulse period; means for combining target information derived from the pulses of wave energy reflected from the same target over a constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals; and means for generating an output signal from the combined target information at fixed intervals each equal in length to the constant period defined by the sum of the predetermined plural number of intervals.
Claim 24
Independent Claim
168 words
A system for interfacing a pulsed radar system having a varying interpulse period with an output device operable at a fixed interpulse period comprising: means for transmitting pulses of wave energy and deriving target information signals from the transmitted pulses of wave energy reflected by a target at varying intervals determined by the varying interpulse period of the radar, the intervals varying in accordance with a sequence wherein the sum of the intervals in consecutive groups of varying intervals each containing a like predetermined plural number of varying intervals defines a constant interpulse period; means for combining target information derived from the pulses of wave energy reflected from the same target over a constant period defined by the sum of the predetermined plural number of intervals in the consecutive groups of the varying intervals; and means for generating an output signal from the combined target information at fixed intervals each equal in length to the constant period defined by the sum of the predetermined plural number of intervals.
Claim 25
Dependent Claim
43 words
The system of claim 20 wherein said combining means comprises means for summing the target information from a specific point in range with a fractional portion of stored data, said summing means providing new stored data in place of the previously stored data.
Claim 26
Dependent Claim
26 words
The system of claim 21 wherein each consecutive group of intervals comprises two consecutive intervals and wherein said combining means comprises an exponentially weighted, feedback integrator.
Claim 27
Dependent Claim
26 words
The system of claim 21 wherein each consecutive group of intervals comprises three consecutive intervals and wherein said combining means comprises an exponentially weighted, feedback integrator.
Claim 28
Dependent Claim
26 words
The system of claim 20 wherein each consecutive group of intervals comprises two consecutive intervals and wherein said combining means comprises an exponentially weighted, feedback integrator.
Claim 29
Dependent Claim
26 words
The system of claim 20 wherein each consecutive group of intervals comprises three consecutive intervals and wherein said combining means comprises an exponentially weighted, feedback integrator.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |