Digital communications modulation method and apparatus
First Claim
1. An apparatus for digital information transfer comprising:
- a) means for allocating one or more source digital signals to unique, repetitive time slots;
b) means for generating an analog information wave for each said source digital signal, each said information wave having a positive wave segment and a negative wave segment and having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the signal;
c) means for transmitting each of the analog information waves within its allocated time slot;
d) means for receiving each of the analog information waves within its allocated time slot;
e) means for extracting a positive-to-negative ratio for each analog information wave received during its allocated time slot; and
f) means for generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio.
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Accused Products
Abstract
A method and apparatus for single signal, multiple channel digital information transfer through waves with time slot allocation. The apparatus consists of one or more transmitting devices and one or more receiving devices. Multiple source signals are each allocated a unique time slot between successive synchronization waves. Digital signals from each source are converted to analog information waves having a positive wave segment and a negative wave segment. The ratio of the amplitude of the positive wave segment to the amplitude of the negative wave segment, the positive-to-negative ratio, for each signal source, is a function of the magnitude of the source digital. The sum of the amplitude of the positive wave segment and the absolute value of the amplitude of the negative wave segment, the positive-to-negative offset, is maintained at a pre-set value at transmission. The total signal, which consists of successive synchronization waves interspersed with information waves for each signal source, each within its allocated time slot, is transmitted to the receivers which extract the positive-to-negative ratio and positive-to-negative offset for each signal source, calibrate the received signals and generate output signals which reproduce the transmitted inputs.
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Citations
53 Claims
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1. An apparatus for digital information transfer comprising:
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a) means for allocating one or more source digital signals to unique, repetitive time slots; b) means for generating an analog information wave for each said source digital signal, each said information wave having a positive wave segment and a negative wave segment and having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the signal; c) means for transmitting each of the analog information waves within its allocated time slot; d) means for receiving each of the analog information waves within its allocated time slot; e) means for extracting a positive-to-negative ratio for each analog information wave received during its allocated time slot; and f) means for generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio. - View Dependent Claims (2, 3, 4, 5, 6, 34, 46)
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7. An apparatus for digital information transfer comprising:
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a) means for generating synchronizing waves of pre-set wave form and frequency; b) means for allocating one or more source digital signals to unique time slots between successive synchronizing waves; c) means for generating an analog information wave for each source digital signal, said information wave having a positive wave segment and a negative wave segment, said information wave having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the source digital signal, and said information wave having a pre-set positive-to-negative offset; d) means for transmitting the information wave for each source digital signal within its allocated time slot; e) means for receiving the information wave for each source digital signal during the allocated time slot for the source digital signal as referenced to successive synchronizing waves; f) means for extracting a positive-to-negative offset and a positive-to-negative ratio for each information wave received during its allocated time slot; g) means for generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; and h) means for calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding information wave as transmitted with the positive-to-negative offset of the information wave as received. - View Dependent Claims (8, 9, 10, 11, 35, 47)
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12. An apparatus for digital information transfer comprising:
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a) a synchronization wave generation circuit; b) a circuit for allocating one or more source digital signals to unique time slots between successive synchronizing waves; c) one or more digital to analog signal generators for generating an analog information wave for each source digital signal, which information wave has a positive wave segment and a negative wave segment and has a positive-to-negative ratio which is a function of the digital magnitude of the corresponding source digital signal as measured during the allocated time slot for the source digital signal, and which information wave has a pre-set positive-to-negative offset; d) one or more transmitters for transmitting the information wave for each source digital signal within its allocated time slot; e) one or more receivers for receiving the information wave for each source digital signal within the allocated time slot for the source digital signal as referenced to successive synchronization waves; f) one or more circuits for extracting the positive-to-negative ratio and the positive-to-negative offset of each information wave received during its allocated time slot; g) one or more analog to digital convertors for generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; h) one or more circuits for calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding information wave as transmitted with the positive-to-negative offset of the information wave as received. - View Dependent Claims (13, 14, 15, 16, 36, 48)
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17. An apparatus for digital information transfer comprising:
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a) means for generating synchronizing waves of pre-set wave form and frequency; b) means for transmitting said synchronizing waves to one or more remote transmission locations; c) means for receiving said synchronizing waves at each remote transmission location; d) means for allocating one or more source digital signals at each remote transmission location to unique time slots between successive synchronizing waves; e) means for generating an analog information wave for each source digital signal, said information wave having a positive wave segment and a negative wave segment, said information wave having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the source digital signal, and said information wave having a pre-set positive-to-negative offset; f) means for transmitting the information wave for each source digital signal from each remote transmission location; g) means for receiving, at one or more locations, the information wave for each source digital signal transmitted from each remote transmission location, the information wave being received within its allocated time slot as referenced to successive synchronization waves; h) means for extracting a positive-to-negative offset and a positive-to-negative ratio for each information wave received during its allocated time slot at one or more locations; i) means for generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; and j) means for calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding information wave as transmitted with the positive-to-negative offset of said information wave as received. - View Dependent Claims (18, 19, 37, 49)
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20. A method for digital information transfer comprising the steps of:
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a) allocating one or more source digital signals to unique, repetitive time slots; b) generating an analog information wave for each said source digital signal, each said information wave having a positive wave segment and a negative wave segment and having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the signal; c) transmitting each of the analog information waves within its allocated time slot; d) receiving each of the analog information waves within its allocated time slot; e) extracting a positive-to-negative ratio for each analog information wave received during its allocated time slot; and f) generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio. - View Dependent Claims (21, 22, 23, 24, 25, 38, 50)
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26. A method for digital information transfer comprising the steps of:
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a) generating synchronizing waves of pre-set wave form and frequency; b) allocating one or more source digital signals to unique time slots between successive synchronizing waves; c) generating an analog information wave for each source digital signal, said information wave having a positive wave segment and a negative wave segment, said information wave having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the source digital signal, and said information wave having a pre-set positive-to-negative offset; d) transmitting the information wave for each source digital signal within its allocated time slot; e) receiving the information wave for each source digital signal during the allocated time slot for the source digital signal as referenced to successive synchronizing waves; f) extracting a positive-to-negative offset and a positive-to-negative ratio for each information wave received during its allocated time slot; g) generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; and h) calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding information wave as transmitted with the positive-to-negative offset of the information wave as received. - View Dependent Claims (27, 28, 29, 30, 39, 51)
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31. A method for digital information transfer comprising the steps of:
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a) generating synchronizing waves of pre-set wave form and frequency; b) transmitting said synchronizing waves to one or more remote transmission locations; c) receiving said synchronizing waves at each remote transmission location; d) allocating one or more source digital signals at each remote transmission location to unique time slots between successive synchronizing waves; e) generating an analog information wave for each source digital signal, said information wave having a positive wave segment and a negative wave segment, said information wave having a positive-to-negative ratio which is a function of the magnitude of the corresponding source digital signal as measured during the allocated time slot for the source digital signal, and said information wave having a pre-set positive-to-negative offset; f) transmitting the information wave for each source digital signal from each remote transmission location; g) receiving, at one or more locations, the information wave for each source digital signal transmitted from each remote transmission location, the information wave being received within its allocated time slot as referenced to successive synchronization waves; h) extracting a positive-to-negative offset and a positive-to-negative ratio for each information wave received during its allocated time slot at one or more locations; i) generating an output digital signal for each information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; and j) calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding information wave as transmitted with the positive-to-negative offset of the information wave as received. - View Dependent Claims (32, 33, 40, 52)
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41. An apparatus for digital information transfer comprising:
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a) a synchronization wave generation circuit; b) a circuit for allocating one or more source digital signals to unique time slots between successive synchronizing waves; c) two or more digital to analog signal generators for simultaneously receiving two or more source digital signals which are allocated the same time slot, simultaneously generating an analog information signal for each of said two or more source digital signals; d) a circuit for combining said analog information signals for a single combined analog information wave, which combined information wave has a positive wave segment and a negative wave segment and has a positive-to-negative ratio which is a function of the digital magnitudes of the corresponding two or more source digital signals as measured during the allocated time slot for the source digital signals, and which combined information wave has a pre-set positive-to-negative offset; e) one or more transmitters for transmitting each combined information wave within its allocated time slot; f) one or more receivers for receiving the combined information wave within the allocated time slot for the source digital signals as referenced to successive synchronization waves; g) one or more circuits for extracting the positive-to-negative ratio and the positive-to-negative offset of each combined information wave received during its allocated time slot; h) one or more analog to digital convertors for generating an output digital signal for each combined information wave received during its allocated time slot, said output digital signal having a digital magnitude which is a function of said extracted positive-to-negative ratio; i) one or more circuits for calibrating the digital magnitude of each output digital signal by comparison of the positive-to-negative offset of the corresponding combined information wave as transmitted with the positive-to-negative offset of the combined information wave as received. - View Dependent Claims (42, 43, 44, 45, 53)
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Specification