Method and system for nonlinear and affine signal processing
AssigneeGMR Research & Technology, Inc.
InventorGil Raz
Life of this patent
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Abstract
A method of nonlinear and affine signal processing includes the steps of introducing an input signal into a system which exhibits nonlinear behavior, the input signal including a target signal and a secondary signal. By virtue of its nonlinear design, the system generates nonlinear artifacts of the target signal and the secondary signal. These nonlinear artifacts are in turn used as a novel form of signal diversity. In one embodiment, the identification of the nonlinear artifacts is used to resolve defects that have been created as a result of sub-Nyquist sampling. In another embodiment, the identification of the nonlinear artifacts is used to locate and strengthen the power of a target signal that falls beneath the noise threshold for the system.
Claims19
A method of nonlinear and affine signal processing, said method comprising the steps of:
- (a) introducing an analog input signal into a nonlinear system, the analog input signal being of a first bandwidth and including a target signal and a secondary signal,
- (b) identifying the nonlinear artifacts of the target signal and the secondary signal that are created as a result of the introduction of the analog input signal into the nonlinear system,
- (c) converting the analog input signal to a distorted digital output signal of a second bandwidth, wherein the second bandwidth is less than the first bandwidth,
- (d) expanding the distorted digital output signal from the second bandwidth to the first bandwidth, and
- (e) resolving signal expansion defects using the identified nonlinear artifacts.
A system for processing an analog input signal, the analog input signal comprising a target signal and a secondary signal, said system comprising:
- (a) an analog-to-digital converter (ADC) having a sampling rate that falls substantially beneath the Nyquist rate, said ADC converting the analog input signal to a distorted digital output signal, and
- (b) a digital signal processor for identifying the nonlinear artifacts of the target signal and the secondary signal,
- (c) wherein said digital signal processor resolves sub-Nyquist sampling defects using the identified nonlinear artifacts.
A method of nonlinear and affine signal processing, said method comprising the steps of:
- (a) introducing an input signal into a nonlinear system, the input signal including a target signal and a secondary signal, the introduction of the input signal into said nonlinear system yielding a distorted output signal which includes the target signal, the secondary signal and a nonlinear artifact of the target signal and the secondary signal,
- (b) identifying the nonlinear artifact of the target signal and the secondary signal, and
- (c) processing the target signal of the distorted output signal using the nonlinear artifact of the target signal and the secondary signal.
Dependencies are inferred from the claim text.