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US 8,804,875 B1Granted
Polar receiver architecture and signal processing methods
AssigneeInnophase, Inc.
InventorsYang Xu, Sara Munoz Hermoso
Life of this patent
Estimating the term…
Abstract
Compressing a variable phase component of a received modulated signal with a second harmonic injection locking oscillator, and generating a delayed phase-compressed signal with a fundamental injection locking oscillator, and combining the phase-compressed signal and the delayed phase-compressed signal to obtain an estimated derivative of the variable phase component, and further processing the estimated derivative to recover data contained within the received modulated signal.
Claims30
A method comprising:
- receiving a modulated signal having a variable phase component wherein the variable phase component includes phase variations in a first phase range;
- generating a phase-compressed signal having a compressed variable phase component by processing the received modulated signal with a second-harmonic injection locking oscillator (ILO), wherein the compressed variable phase component includes phase variations in a compressed phase range being substantially one half the first phase range;
- generating a delayed phase-compressed signal having a delayed compressed variable phase component that is delayed relative to the compressed variable phase component;
- combining the phase-compressed signal and the delayed phase-compressed signal to obtain an estimated derivative of the variable phase component;
- generating an estimated variable phase component signal by filtering the estimated derivative of the variable phase component;
- and,
- providing the estimated phase signal to a polar demodulation circuit.
4 more elements
An apparatus comprising:
- a second-harmonic injection locking oscillator (ILO) configured to generate a phase compressed signal having a compressed variable phase component relative to a variable phase component of an ILO input signal;
- a fundamental ILO connected to the second-harmonic ILO configured to generate a delayed phase-compressed signal;
- a mixer configured to combine the phase-compressed signal and the delayed phase-compressed signal, and to output a signal containing an estimated derivative of the variable phase component;
- and,
- a filter configured to generate an estimated variable phase component signal from the estimated derivative of the variable phase component.
2 more elements
An apparatus comprising:
- a second-harmonic injection locking oscillator (ILO) having an input node and compressed signal output node, configured to receive a modulated signal having a variable phase component with phase variations in a first phase range, and to generate, at the compressed output, a phase-compressed signal having a compressed variable phase component in a compressed phase range being substantially one half the first phase range;
- a fundamental ILO having an input node connected to the compressed output node, and a delayed-output node, the fundamental ILO configured to generate, at the delayed output node, a phase-compressed signal having a delayed compressed variable phase component that is delayed relative to the compressed variable phase component;
- a mixer having a first input node connected to the compressed output node and a second input node connected to the delayed-output node, configured to combine the phase-compressed signal and the delayed phase-compressed signal, and to output, at a mixer output node, a signal containing an estimated derivative of the variable phase component;
- a filter configured to generate an estimated variable phase component signal from the estimated derivative of the variable phase component.
1 more element
Dependencies are inferred from the claim text.