US3758861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the transmission of information at very low signal-to-noise ratios
Assignee: US Philips Corp
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Filing: 1971-07-08
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Granted: 1973-09-11
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Expires: 1991-07-08
Abstract
Abstract The invention relates to a transmission system comprising a transmitter and a receiver for the transmission of information signals, the transmitter including a modulator coupled to the information signal source and the receiver including a detector coupled to the information signal user.
Inventors
- 👤 Jager F De
- 👤 L Zegers
- 👤 N Verhoeckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
302 words
A transmission system for transmitting information from an information signal source to an information signal user, comprising a transmitter; and a receiver; the transmitter comprising a clock pulse generator, pulse pattern generator means for periodically producing an ordered series of different binary words in response to the clock pulses, the individual bits of each word occurring non-periodically within the series, coder means coupled to the information signal source for producing a quantized coded signal corresponding to the information signals to be transmitted, and a control circuit means connected to the output of the coder means for changing the word in the pulse pattern generator to a word of the series corresponding to the quantized coded signal, the control circuit means operating at time intervals equal to an integral number of periods of the periodically produced ordered series of biNary words, whereby a phase change hereinafter referred to as a jump-transition and corresponding to the quantized coded signal is effected by the control circuit means; the receiver comprising a local pulse pattern generator means for producing the same ordered series of binary words produced by the transmitter pulse pattern generator means, a product modulator means connected to the pulse pattern generator of the transmitter and to the local pulse pattern generator for comparing the transmitted binary words to the locally generated binary words, an integrator connected to the output of the product modulator means, a local control circuit means operating in synchronism with the transmitter control circuit means and coupled to the integrator for producing at the end of each period of the received pulse series a local control signal corresponding to the jump-transitions, and a decoder means connected to the signal user and to the local control circuit for decoding the local control signals into a form compatable with the signal user.
Claim 2
Dependent Claim
302 words
A transmission system for transmitting information from an information signal source to an information signal user, comprising a transmitter; and a receiver; the transmitter comprising a clock pulse generator, pulse pattern generator means for periodically producing an ordered series of different binary words in response to the clock pulses, the individual bits of each word occurring non-periodically within the series, coder means coupled to the information signal source for producing a quantized coded signal corresponding to the information signals to be transmitted, and a control circuit means connected to the output of the coder means for changing the word in the pulse pattern generator to a word of the series corresponding to the quantized coded signal, the control circuit means operating at time intervals equal to an integral number of periods of the periodically produced ordered series of biNary words, whereby a phase change hereinafter referred to as a jump-transition and corresponding to the quantized coded signal is effected by the control circuit means; the receiver comprising a local pulse pattern generator means for producing the same ordered series of binary words produced by the transmitter pulse pattern generator means, a product modulator means connected to the pulse pattern generator of the transmitter and to the local pulse pattern generator for comparing the transmitted binary words to the locally generated binary words, an integrator connected to the output of the product modulator means, a local control circuit means operating in synchronism with the transmitter control circuit means and coupled to the integrator for producing at the end of each period of the received pulse series a local control signal corresponding to the jump-transitions, and a decoder means connected to the signal user and to the local control circuit for decoding the local control signals into a form compatable with the signal user.
Claim 3
Dependent Claim
103 words
A transmission system as claimed in claim 1, wherein the transmitter further comprises means connected to the clock pulse generator for providing control pulses having a frequency equal to the frequency of the periodically produced ordered series of binary words, means connecting the control pulses to the control circuit means for controlling the same, a synchronizing transmitter connected to the control pulses for transmitting a synchronizing signal to the receiver, and wherein the receiver further comprises a synchronizing receiver for receiving the transmitted control pulses, and means connecting the output of the synchronizing receiver to the local control circuit for controlling the same.
Claim 4
Dependent Claim
225 words
A transmission system as claimed in claim 2, wherein the transmitter further comprises a second pulse pattern generator means controlled by the clock pulse generator for periodically producing a second ordered series of different binary words the second series having a period equal to an integral multiple of the period of the first series, the individual bits of each word occurring non-periodically within the second series, a state detector means connected to the second pulse pattern generator for providing control pulses for the control circuit, and means for transmitting the second pulse pattern to the receiver as a synchronizing signal; the receiver further comprising a second product multiplier, a second local pulse pattern generator corresponding to the second pulse pattern in the transmitter, means applying the transmitted second pulse pattern and the output of the second local pattern generator to the second product modulator for deriving an output corresponding to the difference between the two second pulse series, a second integrating network connected to the outupt of the second product modulator, a local clock pulse generator connected to the local second pulse pattern generator means connecting the output of the integrator as a phase correcting input to the local clock pulse generator and a local state detector means connected to the local second pulse pattern generator for providing control pulses for the local control circuit.
Claim 5
Dependent Claim
40 words
A transmission system as claimed in claim 1, wherein the control circuit in the transmitter further comprises write gates connected to the first pulse pattern generator for writing the control signal from the coder into the first pulse pattern generator.
Claim 6
Dependent Claim
86 words
A transmission system as claimed in claim 1, wherein the receiver further comprises a local clock pulse generator, means for applying the output of the first integrating network in the receiver to the local clock pulse generator as a phase correction signal, and means connecting the local clock pulse generator to the lcoal first pulse pattern generator thereby providing a means for locking the phase of the local clock pulse generator pulse series to the phase of the pulse series from the transmitter pulse pattern generator.
Claim 7
Dependent Claim
58 words
A transmission system as claimed in claim 5, wherein the local control circuit in the receiver comprises a read circuit connected to the local first pulse pattern generator, read gates connected to the local first pulse pattern generator for providing a local control signal to the decoder at the end of each pulse series received from the trasnmitter.
Claim 8
Dependent Claim
126 words
A transmission system as claimed in claim 1, further comprising a modulo-2-combination circuit connected to the first pulse pattern generator in the transmitter, the modulo-2-combination circuit comprising means for connecting the first pulse pattern generator to the receiver, an amplitude-to-pulse-rate converter connected to the information signal source for providing auxiliary clock pulses corresponding to the quantized amplitude value of the information signal, a register connected to the modulo-2-combination circuit, and an adjusting circuit connected to the amplitude pulse rate converter and having a number of positions corresponding to the number of binary words in the periodically produced ordered series of binary words, a position of the adjusting circuit determined by the auxiliary clock pulse rate effecting a transfer of the modulo-2-combination circuit information into the register.
Claim 9
Dependent Claim
96 words
A transmission system as claimed in claim 1, wherein the receiver further comprises a modulo-2-combination circuit connected to the first local pulse pattern generator, wherein the product modulator comprises a plurality of individual modulators corresponding to the number of binary words in the periodically produced ordered series of binary words, a first input of each individual modulator being commonly connected to the input of the receiver, a second input of each individual modulator being connected to the modulo-2- combination circuit, the integrator connected to the product modulator comprising a separate integrator connected to each individual modulator.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |