Phase Synchronization Device Using Histogram Cost for RF Receiver
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Solution Overview
Problem
Existing RF communication systems face challenges in designing simpler receivers with reduced power consumption and require separate quadrature phase signals to correct phase errors in RF signals, complicating hardware design and increasing power usage.
Innovation Solution
A phase synchronization device that includes a sampling unit, phase shift control unit, and phase shift unit, which uses a histogram function and cost value calculation to determine an optimal phase offset value for adjusting the oscillation signal, eliminating the need for separate quadrature phase signals and reducing power consumption by simplifying the receiver design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate quadrature phase signals are used to correct phase errors, then phase error correction is achieved, but device complexity and power consumption increase
Solution Approach 1:
The patent combines the phase error correction function with the existing in-phase signal processing path by introducing a phase shift unit that generates a phase-shifted signal from the oscillation signal. This merged approach eliminates the need for separate quadrature phase signal paths while maintaining phase error correction capability, thereby reducing device complexity.
Solution Approach 2:
The oscillation signal serves multiple functions: it is used both for frequency conversion in the mixer and as a reference signal for phase error correction through the phase shift unit. This multi-functional use of the oscillation signal eliminates the need for separate quadrature local oscillators, reducing overall system complexity while maintaining correction effectiveness.
2Reliability
If separate quadrature phase signals are used to correct phase errors, then phase error correction is achieved, but power consumption increases
Solution Approach 1:
The patent merges the phase reference function into the existing oscillation signal path by using the phase shift unit to generate a phase-shifted version of the same oscillation signal. This eliminates the need for separate quadrature oscillator circuits and their associated power consumption, while maintaining the ability to correct phase errors in the received signal.
3Reliability
If ADC and DSP are used to compensate phase errors, then phase error correction is achieved, but device complexity and power consumption increase
Solution Approach 1:
The patent replaces the complex digital signal processing approach (ADC + DSP algorithms) with an analog/digital hybrid approach using a phase shift unit that directly adjusts the phase of the oscillation signal. This substitution eliminates the need for high-speed ADCs and complex DSP computations, significantly reducing device complexity while maintaining correction effectiveness through direct phase manipulation.
Data Source
AI summary
The present disclosure relates to a phase synchronization device, and more specifically, to a stochastic RF phase synchronization system (SRFPS) for correcting a phase error of a recovered signal on the basis of an RF signal received through a receiver. The phase synchronization device according to an exemplary embodiment of the present disclosure includes: a sampling unit for outputting a sampling value by sampling a recovered signal based on a predetermined threshold voltage value; a phase shift control unit for calculating a cost value for the recovered signal by using a histogram function generated on the basis of the sampling value, and determining an optimal phase offset value on the basis of the cost value; and a phase shift unit for shifting the phase of an oscillation signal according to the optimal phase offset value.