Phase Shifter Adjustment Using Reception Power and Amplitude Tables
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Solution Overview
Problem
Conventional antenna devices fail to accurately adjust phase shift amounts due to neglecting the power changes associated with phase shifters, resulting in insufficient accuracy.
Innovation Solution
A phase shift amount adjustment device that uses a processor and memory to obtain reception power, store table data on signal amplitudes versus phase shift amounts, and calculate a squared value to maximize an evaluation value by adjusting phase shift amounts, thereby optimizing reception power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional phase shift amount adjustment methods are used, then the adjustment process is simple, but the accuracy of phase shift amount adjustment is insufficient
Solution Approach 1:
The patent implements feedback by measuring the actual reception power at the receiving device and using this measurement to iteratively adjust the phase shift amounts. The correction value calculation unit computes adjustments based on the difference between actual and expected reception power, creating a closed-loop control system that continuously refines the phase shift amounts to maximize reception power, thereby achieving high accuracy without requiring overly complex adjustment procedures.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing table data that represents the relationship between phase shift amounts and signal amplitudes before the actual adjustment process. This pre-computed data is used to guide the phase shift amount adjustment, eliminating the need for complex real-time calculations during operation and simplifying the adjustment process while maintaining high accuracy.
2Measurement precision
If power changes associated with phase shifters are neglected, then the adjustment process is simpler, but the accuracy of phase shift amount adjustment deteriorates
Solution Approach 1:
The patent applies parameter changes by explicitly incorporating power-related parameters into the adjustment process. Instead of neglecting power changes, the system measures actual reception power and uses this power information as a key parameter in calculating correction values. This approach accounts for individual differences and variations in phase shifter characteristics, significantly improving adjustment accuracy while maintaining operational simplicity through automated calculation.
Solution Approach 2:
The system uses feedback by continuously monitoring the actual reception power and using this information to adjust phase shift amounts. The correction value calculation unit processes the power measurements and determines the necessary adjustments, creating a self-correcting system that automatically adapts to power variations without requiring complex manual intervention.
3Measurement precision
If table data on signal amplitudes versus phase shift amounts is stored and used, then phase shift amount adjustment accuracy is improved, but memory requirements and data processing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing table data that represents the relationship between phase shift amounts and signal amplitudes before the actual adjustment process. This pre-computed data is used to guide the phase shift amount adjustment, eliminating the need for complex real-time calculations during operation and simplifying the adjustment process while maintaining high accuracy.
Data Source
AI summary
A phase shift amount adjustment device includes a memory and a processor to obtain reception power at a reception device that receives first and second signals from a transmission device that has first and second antennas to transmit the first and second signals whose phase shift amounts are adjusted by first and second phase shifters, respectively; store, in the memory, table data representing characteristics of amplitudes of the first and second signals with respect to change in the phase shift amounts of the phase shifters, respectively; calculate a squared value of a sum of first and second amplitudes of the first and second signals in first and second phase shift amounts of the phase shifters obtained from the table data; and adjust the first and second phase shift amounts so as to maximize an evaluation value obtained by dividing the reception power divided by the squared value.