Broadband modulation/demodulation apparatus and a method thereof
First Claim
1. A modulator/demodulator system comprising:
- a transmission system with a time scale and time delay encoding system which applies one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, the transmission system combines the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet, and transmits the doublet, wherein the applied one of the plurality of time scales is less than one; and
a receiving system which receives the doublet and extracts information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied.
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Abstract
A modulator/demodulator apparatus and method for applications, such as communications, active sensing and navigation is disclosed. The modulator time-delays and time-scales (compresses or dilates) an arbitrary, noise-like “base signal,” then it sums this time-scaled and time-delayed version of the base signal with the original base signal to create a “signal pair” or doublet. The two signals in the doublet are completely overlapped in time and frequency. This doublet creation process can be repeated (with different base signals and/or different time-scale/time-delay parameters) and multiple doublets can be summed together and simultaneously transmitted. This demodulator uses the applied differential time-scale and differential time-delay to extract information, such as a message or a radar image, from the doublet.
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Citations
91 Claims
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1. A modulator/demodulator system comprising:
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a transmission system with a time scale and time delay encoding system which applies one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, the transmission system combines the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet, and transmits the doublet, wherein the applied one of the plurality of time scales is less than one; and a receiving system which receives the doublet and extracts information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 62, 77)
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4. A modulator/demodulator system comprising:
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a transmission system with a time scale and time delay encoding system which applies one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, wherein the applied one of the plurality of time scales is less than one, wherein the transmission system further comprises a pair of synchronized and spatially separated radiating elements, one radiating element radiates one of the matching base signals and the other radiating element radiates the time scaled and time delayed base signal wherein the one of the matching base signals and the time scaled and the time delayed base signal combine during the radiation to form a doublet; and a receiving system which receives the doublet and extracts information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied.
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12. A modulation/demodulation method comprising:
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applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, wherein the applied one of the plurality of time scales is less than one; combining the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet; transmitting the doublet into the environment;
receiving the doublet; and
extracting information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and on the one of the plurality of time delays which were applied. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 63, 78)
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13. A modulation/demodulation method comprising:
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applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, wherein the applied one of the plurality of time scales is less than one; radiating one of the matching base signals from one of a pair of synchronized and spatially separated radiating elements; radiating the time scaled and time delayed base signal from another one of the pair of synchronized and spatially separated radiating elements, wherein the radiated time scaled and time delayed base signal with the other one of the pair of base signals combine during the radiation to form a doublet;
receiving the doublet; andextracting information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and on the one of the plurality of time delays which were applied.
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22. A receiver system for receiving transmitted information comprising:
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a receiver which receives a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays are applied to at least one of the base signals to encode information before being combined with the other base signal; and a processing system which extracts the information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied, wherein the applied one of the plurality of time scales is less than one, wherein the receiver further comprises a device that time scales a received signal from the doublet by the time scale that was applied to form a time scaled version of the received signal, a correlator that correlates the received signal with the time scaled version of the received signal to form a time delay correlation signal, a detector that detects the peaks of this time delay correlation signal, and an estimator that uses the time delay locations of the peaks to estimate the angle of arrival of each of the received signals. - View Dependent Claims (24, 64, 79)
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23. A receiver system for receiving transmitted information comprising:
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a receiver which receives a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and a processing system which extracts the information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied to the doublet prior to transmission, wherein the applied one of the plurality of time scales is less than one; wherein the receiver receives a plurality of the doublets in a composite signal and the processing system extracts the information from the composite signal based on the one of the plurality of time scales and the one of the plurality of time delays which were applied to at least one of the base signals in each of the doublets. - View Dependent Claims (65, 80)
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25. A receiver system for receiving transmitted information comprising:
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a receiver which receives a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and a processing system which extracts the information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied to the doublet prior to transmission, wherein the applied one of the plurality of time scales is less than one; wherein the processing system further comprises; a segmentation device that receives the doublet and forms received segments from the received doublet; a time scaling device which applies at least one of the plurality of time scales to each of the received segments to form time scaled signal segments; a time delaying device which applies at least one of the plurality of time delays to each of the received segments to form time delayed signal segments; a multiplier which multiplies each of the time scaled signal segments with each of the time delayed signal segments to form multiplied signals; and an integrator which integrates the multiplied signals across time to form detection signals, the processing system comparing the detection signals at different ones of the plurality of time scales and different ones of the plurality of time delays over time to determine the applied one of the plurality of time scales and the applied one of the plurality of time delays to extract the information from the detection signal. - View Dependent Claims (66, 81)
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26. A receiver system for receiving transmitted information comprising:
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a receiver which receives a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and a processing system which extracts the information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied, wherein the applied one of the plurality of time scales is less than one; wherein the receiver further comprises;
a temporal equalizer which substantially assures that signal energy of the matching base signals is evenly distributed across the duration of the at least two matching base signals; anda spectral equalizer which substantially assures that the signal energy is evenly distributed across the spectrum of the at least two matching base signals. - View Dependent Claims (67, 82)
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27. A receiving method for receiving information comprising:
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receiving a plurality of doublets contained in a composite signal, each of the doublets comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and extracting information from the composite signal based on the one of the plurality of time scales and the one of the plurality of time delays which were applied to at least one of the base signals in each of the doublets, wherein the applied one of the plurality of time scales is less than one. - View Dependent Claims (68, 83)
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28. A receiving method for receiving information comprising:
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receiving a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and extracting information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales which were applied, wherein the applied one of the plurality of time scales is less than one; wherein the information comprises imaging data embedded by an environment in which the doublet was transmitted. - View Dependent Claims (69, 84)
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29. A receiving method for receiving information comprising:
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receiving a doublet, the doublet comprises at least two matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and extracting information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied, wherein the applied one of the plurality of time scales is less than one; wherein the extracting further comprises;
segmenting the received doublet to form received segments;applying at least one of the plurality of time scales to each of the received segments to form time scaled signal segments; applying at least one of the plurality of time delays to each of the received segments to form time delayed signal segments; multiplying each of the time scaled signal segments with each of the time delayed signal segments to form multiplied signals; and
integrating the multiplied signals across time to form detection signals, wherein the extracting further comprises processing the detection signals at different ones of the plurality of time scales and different ones of the plurality of time delays over time to determine the applied one of the plurality of time scales and the applied one of the plurality of time delays to extract the information from the determined detection signal. - View Dependent Claims (70, 85)
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30. A receiving method for receiving information comprising:
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receiving a doublet comprising a combined pair of matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; extracting information from between the time scaled and time delayed base signal and the other base signal which comprise the doublet based on the one of the plurality of time scales and the one of the plurality of time delays which were applied, wherein the applied one of the plurality of time scales is less than one; substantially assuring that signal energy of the pair of matching base signals is evenly distributed across the duration of the pair of matching base signals following the receiving; and substantially assuring that the signal energy is evenly distributed across the spectrum of the pair of matching base signals following the receiving. - View Dependent Claims (71, 86)
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31. A receiving method for receiving information comprising:
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receiving a doublet comprising a combined matching base signals where one of a plurality of time scales and one of a plurality of time delays is applied to at least one of the base signals to encode information before being combined with the other base signal; and extracting information from between the time scaled and time delayed base signal and the other base signal based on the one of the plurality of time scales and the one of the plurality of time delays which were applied to, wherein the applied one of the plurality of time scales is less than one. - View Dependent Claims (72, 87)
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32. A communication system comprising:
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a transmission system with a time scale and time delay encoding system embeds communication information by applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals, the transmission system combines the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet, and transmits the doublet, wherein the applied one of the plurality of time scales is less than one; and a receiving system which receives the doublet and extracts information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 73, 88)
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40. A method for communicating comprising:
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applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to embed communication information, wherein the applied one of the plurality of time scales is less than one; combining the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet; transmitting the doublet into the environment; receiving the doublet; and extracting the communication information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and on the one of the plurality of time delays which were applied. - View Dependent Claims (41, 42, 43, 44, 45, 46, 74, 89)
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47. An imaging system comprising:
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a transmission system with a time scale and time delay encoding system which applies one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals, combines the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet, and transmits the doublet into an environment which embeds imaging information in the doublet, wherein the applied one of the plurality of time scales is less than one; and a receiving system which receives the doublet and extracts the imaging information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied. - View Dependent Claims (48, 49, 51, 52, 53, 54, 75, 90)
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50. An imaging system comprising:
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a transmission system with a time scale and time delay encoding system which applies one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals, wherein the applied one of the plurality of time scales is less than one, wherein the transmission system further comprises a pair of synchronized and spatially separated radiating elements, one radiating element radiates one of the matching base signals and the other radiating element radiates the time scaled and time delayed base signal into the environment which embeds the imaging information wherein the one of the matching base signals and the time scaled and the time delayed base signal combine in the environment to form a doublet; and a receiving system which receives the doublet and extracts the imaging information from between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and the one of the plurality of time delays which were applied.
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55. A method for imaging comprising:
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applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, wherein the applied one of the plurality of time scales is less than one; combining the time scaled and time delayed base signal with the other one of the pair of base signals to form a doublet; transmitting the doublet into the environment that embeds imaging information; receiving the doublet; and
extracting the imaging information from doublet between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and on the one of the plurality of time delays which were applied. - View Dependent Claims (58, 59, 60, 61, 76, 91)
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56. A method for imaging comprising:
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applying one of a plurality of time scales and one of a plurality of time delays to one of a pair of matching base signals to encode information, wherein the applied one of the plurality of time scales is less than one; radiating one of the matching base signals from one of a pair of synchronized and spatially separated radiating elements; radiating the time scaled and time delayed base signal from another one of the pair of synchronized and spatially separated radiating elements, wherein the radiated time scaled and time delayed base signal with the other one of the pair of base signals combine during the radiation to form a doublet;
receiving the doublet; andextracting the imaging information from doublet between the time scaled and time delayed base signal and the other one of the pair of base signals based on the one of the plurality of time scales and on the one of the plurality of time delays which were applied. - View Dependent Claims (57)
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Specification