Phase Variation Compensation Circuit Using Dual Detection
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Solution Overview
Problem
Conventional phase variation compensation devices and methods fail to accurately remove phase noise and often result in complex circuits, especially when attempting to compensate phase slips under noisy conditions.
Innovation Solution
A phase variation compensation device that includes first and second phase difference detection circuits to detect and compensate phase variations using a known pattern and M-th power processing, simplifying the circuit while enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional phase variation compensation methods are used, then phase noise compensation is performed, but phase variation is not sufficiently removed and remains
Solution Approach 1:
The patent segments phase difference detection into two distinct circuits: one detecting phase difference from known patterns (first phase difference detection circuit) and another detecting phase variation after M-th power processing (second phase difference detection circuit). This segmentation allows each circuit to specialize in different aspects of phase compensation, achieving both high accuracy and effective phase variation removal without requiring complex phase slip compensation circuits.
2Reliability
If a phase slip compensation circuit is provided to compensate phase slips under noisy conditions, then phase slip compensation is achieved, but the circuit becomes complicated
Solution Approach 1:
The patent merges the functions of known pattern-based phase difference detection and M-th power-based phase variation detection into a unified phase compensation device. By combining these two detection circuits and their respective compensation outputs, the system achieves robust phase slip compensation capability without requiring separate complex phase slip compensation circuits, thus reducing overall circuit complexity while maintaining reliability.
3Ease of operation
If only tentative judgment based on threshold is used, then phase error compensation is performed, but accuracy of phase noise compensation is low
Solution Approach 1:
The patent implements feedback mechanisms where phase differences detected from known patterns and phase variations detected after M-th power processing are continuously fed back to adjust and refine phase compensation. This feedback approach enables the system to maintain high phase noise compensation accuracy while keeping the operation relatively simple, avoiding the need for complex iterative algorithms.
Data Source
AI summary
A known pattern comparison type phase difference detection unit (12) detects a phase difference between a known pattern extracted from a received signal and a true value of the known pattern as a first phase difference. M indicates the number of modulation phases in a phase modulation method of the received signal. An M-th power type phase difference detection unit (13) removes a modulation component by raising the received signal to M-th power, and detects phase variation from a modulation phase point used for mapping on a transmission side, as a second phase difference. A phase compensation unit (11) compensates phase variation of the received signal based on an addition result of the first phase difference and the second phase difference.