Phase-optimized constant envelope transmission (POCET) method, apparatus and system
First Claim
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1. An apparatus for generating a constant envelope composite signal, comprising:
- a modulator configured to phase modulate a carrier signal utilizing a finite set of composite signal phases to combine three or more component signals, each having two or more phases, in order to generate and maintain the constant envelope composite signal; and
computation circuitry configured to determine the finite set of composite signal phases through an optimization process that minimizes the power of the composite signal, subject to a plurality of intra-signal constraints for the component signals, said optimization process includes optimization of an objective function of the power of the composite signal.
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Abstract
An apparatus and method for generating a composite signal includes electronics configured to modulate a carrier utilizing a finite set of composite signal phases to generate a composite signal, the finite set of composite signal phases being determined through an optimization process that minimizes a constant envelope for the phase modulated carrier, subject to constraints on desired signal power levels of the signals to be combined and either zero or one or more relative phase relationships between the signals. The apparatus and method can be extended to generating an optimized composite signal of different frequencies.
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Citations
36 Claims
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1. An apparatus for generating a constant envelope composite signal, comprising:
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a modulator configured to phase modulate a carrier signal utilizing a finite set of composite signal phases to combine three or more component signals, each having two or more phases, in order to generate and maintain the constant envelope composite signal; and computation circuitry configured to determine the finite set of composite signal phases through an optimization process that minimizes the power of the composite signal, subject to a plurality of intra-signal constraints for the component signals, said optimization process includes optimization of an objective function of the power of the composite signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for generating a constant envelope composite signal, comprising the steps of:
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phase modulating a carrier signal with a modulator that uses a finite set of composite signal phases to combine three or more component signals, each having two or more phases, in order to generate the constant envelope composite signal; and determining with computation circuitry, the finite set of composite signal phases through an optimization process that minimizes the power of the composite signal, subject to a plurality of intra-signal constraints for the component signals, said optimization process includes optimization of an objective function of the power of the composite signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification