US3761817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and transmission system for transmitting commands to a radio guided missile
Assignee: Airbus Defence and Space GmbH
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Filing: 1972-05-23
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Granted: 1973-09-25
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Expires: 1992-05-23
Abstract
Abstract In a method for the transmission of commands to a radio-guided missile or satellite, analog command bits are coded, in a transmitter, with signals from at least one random generator, and decoded in a receiver, on the missile or satellite, with the signals of the random generator being stored in associated storages in both the transmitter and the receiver, and before the missile or satellite is launched. In accordance with the invention, the random generator supplies multi-digit binary signals which are assigned individually to specific analog command bits, and these signals are stored in storages of the receiver. During transmission of commands, the storage signals are used as reference signals for comparison, by correlation, with each coded signal received by radio and, responsive to a predetermined agreement of the received coded signal with one of the reference signals, the analog command bit, assigned to such reference signal, is generated as a decoded signal. The apparatus includes a transmitting station and a receiving station having corresponding numbers of storages. The storages of the transmitter are connected through a logical circuit to an analog command signal generator, and the outputs of the storages are connected through a signal processing and modulation circuit to a transmitting stage which can be switched by a reversing switch to a transmitting antenna. An umbilical cord connects the ground station to the missile and is connected, in the missile, to a demodulation and signal processing circuit 20 and to a receiving antenna through an additional reversing switch. The output of the additional reversing switch is conducted, through further reversing switches in parallel with the storages in the missile. Transit storages, corresponding to the missile storages, are provided in association with a summation and comparison circuit and with the output of the demodulation and signal processing circuit. An output signal, corresponding to the analog command signal from the transmitter, is provided when the signals stored in two corresponding storages are identical.
Inventors
- 👤 B Flachmann
- 👤 H Kaltschmidt
- 👤 P Scholler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; F41G7/301; F41G7/306; F41G7/007
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
151 words
In a method for the transmission of commands to a radioguided missile or satellite in which analog command bits are coded, in a transmitter, with signals from at least one random generator, and decoded in a receiver on the missile or satellite, and in which the signals of each random generator are stored in associated storages, in both the transmitter and the receiver, before the missile or satallite is launched: the improvement comprising supplying, from the random generator, multi-digit binary signals which are assigned individually to specific analog command bits; storing these signals in storages of the receiver; utilizing the stored signals, during transmission of commands, as reference signals for comparison, by correlation, with each coded signal received by radio; and, responsive to a predetermined agreement of the received coded signal with one of the reference signals, generating the analog command bit assigned to such reference signal, as a decoded signal.
Claim 2
Dependent Claim
151 words
In a method for the transmission of commands to a radioguided missile or satellite in which analog command bits are coded, in a transmitter, with signals from at least one random generator, and decoded in a receiver on the missile or satellite, and in which the signals of each random generator are stored in associated storages, in both the transmitter and the receiver, before the missile or satallite is launched: the improvement comprising supplying, from the random generator, multi-digit binary signals which are assigned individually to specific analog command bits; storing these signals in storages of the receiver; utilizing the stored signals, during transmission of commands, as reference signals for comparison, by correlation, with each coded signal received by radio; and, responsive to a predetermined agreement of the received coded signal with one of the reference signals, generating the analog command bit assigned to such reference signal, as a decoded signal.
Claim 3
Dependent Claim
73 words
In a method for the transmission of commands, the improvement claimed in claim 1, including supplying, from an additional random generator, a predetermined additional signal; utilizing the predetermined additional signal to frequency-modulate a carrier frequency; modulating the signals coded in the transmitter upon the frequency-modulated carrier freqeuncy; supplying the same predetermined additional signal from a corresponding random generator to the receiver; and using the last-named supplied predetermined signal to demodulate the carrier frequency.
Claim 4
Dependent Claim
33 words
In a method for the transmission of commands, the improvement claimed in claim 1, including utilizing noise generators as the random generators; and utilizing limiters to transform the noise signals into binary signals.
Claim 5
Dependent Claim
49 words
In a method for the transmission of commands, the improvement claimed in claim 1, including utilizing feedback shift registers as the random generators; and generating a binary signal of random distribution in accordance with the feedback connection between at least two individual storage places of the feedback shift registers.
Claim 6
Dependent Claim
47 words
A method for the transmission of commands, the improvement claimed in claim 1, including utilzing respective time circuits to synchronize the generation and processing of the signals in the transmitter and in the receiver; and synchronizing the two time circuits in advance of launching of the missile.
Claim 7
Dependent Claim
44 words
In a method for the transmission of commands, the improvement claimed in claim 2, including transforming the binary signals into two signals having respective different frequencies; mixing the two signals with an intermediate frequency; and utilzing the intermediate frequency to frequency-modulate the carrier frequency.
Claim 8
Dependent Claim
88 words
In a method for the transmission of commands, the improvement claimed in claim 6, including, in the receiver, demodulating the intermediate frequency from the carrier frequency; utilizing band filters to separate the two frequency signals from each other; supplying the separated frequency signals to respective envelope detectors; supplying the outputs of the two envelope detectors to a comparator and determining, at the output of the comparator and as a result of the comparison of the two signals supplied thereto, the respective binary signal state of the binary signal.
Claim 9
Dependent Claim
98 words
In a method for the transmission of commands, the improvement claimed in claim 7, including storing the output signal of the comparator in parallel in transit storages each associated with the respective one of the first-mentioned storages in the receiver; utilizing respective comparison and summation circuits to compare the signal contents of the associated first-mentioned storage; and, responsive to a predetermined agreement between a signal just stored in each transit storage and a reference signal in the associated first-mentioned storage providing, at the output of a comparison and summation circuit, a signal corresponding to the analog command bit.
Claim 10
Dependent Claim
357 words
In a command transmission system for transmitting commands to a radio-guided missile or satellite, of the type including a transmitting station supplying the commands and receiving station in the missile, and in which analog command bits are coded, in the transmitter, with signals from at least one random generator, and decoded in the receiver, with the signals of each random generator being stored in associated storages, in both the transmitter and the receiver, before the missile or satellite is launched: the improvement comprising, in combination, said transmitting station and said receiving station having corresponding numbers of said storages; an analog command signal generator included in said transmission station; a logical circuit connecting the control inputs of the storages of the transmitting station to said analog command signal generator; a signal processing and modulation circuit connected to the outputs of the storages of said transmitting station; a transmitting stage connected to the output of said signal processing and modulation circuit; a transmitting antenna; an umbilical cord connection between said transmitting station and said receiving station; a first reversing switch operable to connect said transmitting stage selectively to either said transmitting antenna or to said umbilical cord connection; a receiving antenna included in the receiving station; a demodulation and signal processing circuit included in said receiving station; a second reversing switch operable to connect said demodulation and signal processing circuit selectively to either said receiving antenna or said umbilical cord connection; third reversing switches connecting the output of said demodulation and signalling processing circuit in parallel to said first-mentioned storages provided in said receiving station; transit storages in said receiving station equal in number to said first-mentioned storages in said receiving station; respective summation and comparison circuits connecting each transit storage to a respective associated first-mentioned storage; said third reversing switches connecting said transit storages in parallel to the output of said demodulation and signal processing circuit; and means operable, responsive to a predetermined agreement of a received coded signal in a transit storage with a reference signal in the assoCiated first-mentioned storage to supply an output signal corresponding to the analog command signal generated in said transmitting station.
Claim 11
Dependent Claim
357 words
In a command transmission system for transmitting commands to a radio-guided missile or satellite, of the type including a transmitting station supplying the commands and receiving station in the missile, and in which analog command bits are coded, in the transmitter, with signals from at least one random generator, and decoded in the receiver, with the signals of each random generator being stored in associated storages, in both the transmitter and the receiver, before the missile or satellite is launched: the improvement comprising, in combination, said transmitting station and said receiving station having corresponding numbers of said storages; an analog command signal generator included in said transmission station; a logical circuit connecting the control inputs of the storages of the transmitting station to said analog command signal generator; a signal processing and modulation circuit connected to the outputs of the storages of said transmitting station; a transmitting stage connected to the output of said signal processing and modulation circuit; a transmitting antenna; an umbilical cord connection between said transmitting station and said receiving station; a first reversing switch operable to connect said transmitting stage selectively to either said transmitting antenna or to said umbilical cord connection; a receiving antenna included in the receiving station; a demodulation and signal processing circuit included in said receiving station; a second reversing switch operable to connect said demodulation and signal processing circuit selectively to either said receiving antenna or said umbilical cord connection; third reversing switches connecting the output of said demodulation and signalling processing circuit in parallel to said first-mentioned storages provided in said receiving station; transit storages in said receiving station equal in number to said first-mentioned storages in said receiving station; respective summation and comparison circuits connecting each transit storage to a respective associated first-mentioned storage; said third reversing switches connecting said transit storages in parallel to the output of said demodulation and signal processing circuit; and means operable, responsive to a predetermined agreement of a received coded signal in a transit storage with a reference signal in the assoCiated first-mentioned storage to supply an output signal corresponding to the analog command signal generated in said transmitting station.
Claim 12
Dependent Claim
23 words
In a command transmission system, the improvement claimed in claim 9, in which said first-mentioned storages and said transit storages are shift registers.
Claim 13
Dependent Claim
40 words
In a command transmission system, the improvement claimed in claim 9, in which each random generator is a noise generator connected in series with a limiter operable to transform the noise signal into a binary signal sequency of random distribution.
Claim 14
Dependent Claim
57 words
In a command transmission system, the improvement claimed in claim 10, in which the shift registers in siad transmitting station have individual storage places back-coupled with each other to provide a binary signal sequency of random but periodic distribution from each shift register; and means supplying a cycle frequency to each shift register of said transmitting station.
Claim 15
Dependent Claim
78 words
In a command transmission system, the improvement claimed in claim 9, including respective quartz clock controlled time circuits provided in said transmitting station and in said receiving station for the sequential control of the signal flow; said time circuits being interconnected with each other by said umbilical cord connection, until the time the missile is fired, in a manner such that the time circuit of said receiving station is controlled by the time circuit of said transmitting station.
Claim 16
Dependent Claim
153 words
In a command transmission system, the improvement claimed in claim 9, including two first oscillators in said transmitting station oscillating with respective different frequencies and each assigned to a respective signal state of the binary signal sequences; a first mixer stage; a switch controlled by the binary signal to be transmitted and operable to connect a corresponding one of said first oscillators to an input of said first mixer stage; a third oscillator, oscillating with an intermediate carrier frequency, connected to the other input of said first mixer stage; a second mixer stage; band filters blocking undesired modulation products, connecting the output of said first mixer stage to an input of said second mixer stage; a fourth oscillator, osicllating with a carrier frequency; means frequency-modulating said fourth osicllator by a control voltage; and a third band filter blocking undesired modulation products, connecting the output of said second mixer stage to said transmitting stage.
Claim 17
Dependent Claim
26 words
In a command transmission system, the improvement claimed in claim 14, including an additional random generator connected to said fourth oscillator and generating the control voltage.
Claim 18
Dependent Claim
195 words
In a command transmission system, the improvement claimed in claim 14, including a fourth band filter connected to said second reversing switch in the receiving station; a third mixer stage having an input connected to the output of said fourth band filter; a fifth oscillator connected to the other input of said third mixer stage, and oscillating at the same frequency as said fourth oscillator; means frequency-modulating said fifth oscillator with the same time-dependent control voltage modulating said fourth oscillator; a fourth mixer stage; a fifth band filter, tuned to the modulated intermediate carrier frequency, connecting the output of said third mixer stage to an input of said fourth mixer stage; a sixth oscillator, oscillating with the intermediate carrier frequency, connected to the other input of said fourth mixer stage; two sixth band filters, each tuned to the frequency of a respective one of said first oscillators, connected to the output of said fourth mixer stage; a comparator; and respective envelope detectores each connecting a sixth filter to said comparator; the output of said comparator being connected through said third reversing switches to said first-mentioned storages of said receiving station and to said transit storages.
Claim 19
Dependent Claim
91 words
In a command transmission system, the improvement claimed in claim 10, including respective thresHold value switches connected in series with said summation and comparison circuits of said receiving station; said threshold value switches being balanced so that they respond only when a signal, just stored in the associated transit storage, is completely identical with one of the reference signals stored in the associated shift register; and respective digital-analog converters connected in series with each threshold value switch and providing, at their outputs, a command bit corresponding to the respective reference signal.
Claim 20
Dependent Claim
52 words
In a command transmission system, the improvement claimed in claim 17, including a revertive communication line connected in parallel to the outputs of said threshold value switches and connected to said umbilical cord connection, whereby test signals can be supplied to said transmitting station until such time as the missile is fired.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |