Transpositional modulation systems, methods and devices
First Claim
1. A method of increasing the bandwidth of a signal, the method comprising:
- receiving a sample of a first modulated signal, the first modulated signal including a carrier signal modulated with a non-transpositional modulation signal;
removing the non-transpositional modulation signal from the sample of the first modulated signal to obtain the carrier signal;
modulating the carrier signal with a transpositional modulation signal to obtain a second modulated signal;
combining the second modulated signal with the first modulated signal to produce a combined signal; and
transmitting the combined signal.
8 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods and devices for transmitting and receiving and demodulating transpositional modulated signals, for increasing information bandwidth of defined communication channels, and for time-delay shifting an input signal in accordance to an input control signal are provided. One such method of increasing the information bandwidth of a defined communication channel includes receiving a first modulated signal having a first carrier signal frequency; receiving a second modulated signal having a second carrier signal frequency, the second modulated signal being modulated with information independent of information modulating the first carrier signal, the second carrier signal frequency being harmonically or sub-harmonically related to the first carrier signal frequency; and combining the first and second signals.
44 Citations
19 Claims
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1. A method of increasing the bandwidth of a signal, the method comprising:
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receiving a sample of a first modulated signal, the first modulated signal including a carrier signal modulated with a non-transpositional modulation signal; removing the non-transpositional modulation signal from the sample of the first modulated signal to obtain the carrier signal; modulating the carrier signal with a transpositional modulation signal to obtain a second modulated signal; combining the second modulated signal with the first modulated signal to produce a combined signal; and transmitting the combined signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A time-shift modulator comprising an all-pass filter modified with a voltage-controlled time delay, wherein the all-pass filter comprises:
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an operational amplifier having a feedback resistor connected between an output of the operational amplifier and an inverting input of the operational amplifier; a second resistor having a resistance substantially equal to a resistance of the feedback resistor, the second resistor being connected between the inverting input of the operational amplifier and a signal input; and a series capacitor and resistor network, the series capacitor and resistor network having a first end connected to the signal input, a second end connected to ground, and a mid-junction connected to the non-inverting input of the operational amplifier. - View Dependent Claims (9)
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10. A method of increasing communication bandwidth within a fixed communication channel, comprising:
adding a second transpositional modulated signal to a combined signal, the combined signal comprising a first transpositional modulated signal and a first fundamental carrier signal, wherein the second transpositional modulated signal is added to the combined signal using a second fundamental carrier signal having a same frequency as the first fundamental carrier signal, and having a phase angle of 90 degrees with respect to the first fundamental carrier signal. - View Dependent Claims (11)
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12. A system comprising:
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at least one processor; and a data store coupled to the at least one processor having instructions stored thereon which, when executed by the at least one processor, causes the at least one processor to perform operations comprising; receiving a sample of a first modulated signal, the first modulated signal including a carrier signal modulated with a non-transpositional modulation signal; removing the non-transpositional modulation signal from the sample of the first modulated signal to obtain the carrier signal; modulating the carrier signal with a transpositional modulation signal to obtain a second modulated signal; combining the second modulated signal with the first modulated signal to produce a combined signal; and transmitting the combined signal. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A system comprising:
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at least one processor; and a data store coupled to the at least one processor having instructions stored thereon which, when executed by the at least one processor, causes the at least one processor to perform operations comprising; adding a second transpositional modulated signal to a combined signal, the combined signal comprising a first transpositional modulated signal and a first fundamental carrier signal, wherein the second transpositional modulated signal is added to the combined signal using a second fundamental carrier signal having a same frequency as the first fundamental carrier signal, and having a phase angle of 90 degrees with respect to the first fundamental carrier signal.
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Specification