Phased Array Channel Deviation Correction via Phase Offset
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Solution Overview
Problem
Current methods for correcting deviations between transmission channels in phased arrays, especially in 5G systems, are costly and prone to measurement errors due to external measurement device reliance and environmental interference, leading to low correction accuracy.
Innovation Solution
An apparatus and method that set a phase offset between transmission channels to deviate their phase deviation from zero, allowing for improved detection of signal powers and determination of correction values, including phase and amplitude corrections, to enhance accuracy and reduce measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external measurement device is used for transmission channel correction, then correction can be performed, but measurement costs are high and measurement error is large
Solution Approach 1:
The patent extracts the measurement function from external devices and relocates it to the chip itself by integrating power detection units directly into the transmission channel chip. This eliminates the need for external measurement devices and their associated costs and environmental vulnerabilities.
Solution Approach 2:
The chip performs self-measurement and self-correction by integrating power detection units that can detect signal powers internally. The system uses its own resources (transmission channels and detection units) to perform measurements without external assistance, thereby reducing costs and improving reliability.
2Reliability
If external measurement device is used for transmission channel correction, then correction can be performed, but it is easily affected by surrounding electromagnetic environment
Solution Approach 1:
The measurement function is extracted from the external electromagnetic environment and moved inside the chip's controlled environment. The power detection units are integrated within the chip, isolating the measurement process from external electromagnetic interference.
Solution Approach 2:
The patent introduces internal power detection units as intermediaries between the transmission channels and the correction process. These detection units serve as a protected interface that shields the measurement process from external electromagnetic environment while enabling accurate power detection.
3Measurement precision
If phase deviation is close to zero during detection, then correction can be performed, but detection errors are relatively large
Solution Approach 1:
The patent changes the phase deviation parameter from near-zero to a non-zero value during the measurement process. By intentionally setting the phase deviation to a non-zero value, the system improves signal power detection accuracy, and then uses this accurate measurement to determine the appropriate correction value that will adjust the phase deviation back to the desired state.
Solution Approach 2:
The system performs a preliminary measurement at a non-zero phase deviation point before applying the final correction. This preliminary action at an optimized measurement point provides more accurate detection data, which is then used to calculate the precise correction needed to achieve the target phase alignment.
Data Source
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AI summary
This application relates to the field of communications technologies, and provides an apparatus and a method for correcting a deviation between a plurality of transmission channels, to improve accuracy of deviation correction between transmission channels. The plurality of transmission channels include a first transmission channel and a second transmission channel. The apparatus includes: a phase offset unit, configured to set a phase offset between the first transmission channel and the second transmission channel, so that a phase deviation between the first transmission channel and the second transmission channel deviates from zero; a power detection unit, configured to detect signal powers of the first transmission channel and the second transmission channel under the phase offset; a processing unit, configured to determine, based on the detected signal powers, a deviation correction value between the first transmission channel and the second transmission channel, where the deviation correction value includes a phase correction value; and a phase correction unit, configured to set the phase correction value between the first transmission channel and the second transmission channel.