US3634765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System to provide an impulse autocorrelation function upon linear addition of a plurality of multidigit code signals having cooperating autocorrelation functions including amplitude control of the digits of one or more of said code signals
Assignee: TDK Micronas GmbH
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Filing: 1970-02-09
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Granted: 1972-01-11
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Expires: 1990-02-09
Abstract
Abstract A pseudonoise multiplexed code class where at least one code signal of a group of two or more code signals has its amplitude controlled according to a given weighting factor at either the transmitter or receiver to adjust the autocorrelation function thereof to provide cooperating autocorrelation functions for the group of code signals so that when autocorrelation functions of the group of code signals are linearly added together, an output signal having an impulse autocorrelation function results.
Inventors
- 👤 Frank S Gutleber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/30; G06; G06J; G06J1/00; H; H04; H04L; H04L5/00; H04L5/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A system to provide an output signal having an impulse output at a given time and a zero output at all other times comprising: a clock source; a plurality of separate code generators coupled in common to said source, each of said generators generating a different discrete predetermined code signal having a plurality of digits of predetermined binary condition, one of said binary conditions being represented by a pulse having a given amplitude, and each of said code signals having a different autocorrelation function, the autocorrelation functions of each of said code signals having a predEtermined relationship; a plurality of analog amplitude control means, each of said control means being coupled to a different one of said generators, at least one of said control means being selected to have a given gain different than one but related to the relationship between the autocorrelation functions of said code signals and the other of said control means having a gain of one, said selected one of said control means controlling the amplitude of each of the digits in said one of said binary conditions of its associated one of said code signals to adjust the autocorrelation function thereof for cooperation with the autocorrelation functions of the others of said code signals to produce, when said code signals are linearly added together, said output signal; and first means coupled in common to said plurality of said control means to linearly add said code signals and produce said output signal.
Claim 2
Independent Claim
246 words
A system to provide an output signal having an impulse output at a given time and a zero output at all other times comprising: a clock source; a plurality of separate code generators coupled in common to said source, each of said generators generating a different discrete predetermined code signal having a plurality of digits of predetermined binary condition, one of said binary conditions being represented by a pulse having a given amplitude, and each of said code signals having a different autocorrelation function, the autocorrelation functions of each of said code signals having a predEtermined relationship; a plurality of analog amplitude control means, each of said control means being coupled to a different one of said generators, at least one of said control means being selected to have a given gain different than one but related to the relationship between the autocorrelation functions of said code signals and the other of said control means having a gain of one, said selected one of said control means controlling the amplitude of each of the digits in said one of said binary conditions of its associated one of said code signals to adjust the autocorrelation function thereof for cooperation with the autocorrelation functions of the others of said code signals to produce, when said code signals are linearly added together, said output signal; and first means coupled in common to said plurality of said control means to linearly add said code signals and produce said output signal.
Claim 3
Dependent Claim
14 words
A system according to claim 1, wherein said first means includes a linear adder.
Claim 4
Dependent Claim
51 words
A system according to claim 1, further including a transmitter coupled in common to said plurality of said control means, a receiver, a propagation medium interconnecting said transmitter and said receiver, and a plurality of detectors, one for each of said code signals, coupled between said receiver and said first means.
Claim 5
Dependent Claim
22 words
A system according to claim 3, wherein said first means includes a linear adder coupled in common to each of said detectors.
Claim 6
Dependent Claim
19 words
A system according to claim 3, wherein each of said detectors includes a matched filter type code signal detector.
Claim 7
Dependent Claim
53 words
A system according to claim 1, further including a transmitter coupled in common to said plurality of said code generators, a receiver, a propagation medium interconnecting said transmitter and said receiver, and a plurality of detectors, one for each of said code signals, coupled between said receiver and said plurality of control means.
Claim 8
Dependent Claim
19 words
A system according to claim 6, wherein each of said detectors includes a matched filter type code signal detector.
Claim 9
Dependent Claim
23 words
A system according to claim 6, wherein said first means includes a linear adder coupled in common to each of said control means.
Claim 10
Dependent Claim
19 words
A system according to claim 1, wherein said code signals number two, and said selected control means number one.
Claim 11
Dependent Claim
19 words
A system according to claim 1, wherein said code signals number three, and said selected control means number two.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |