Antenna Port Connection Error Detection via Amplitude Phase Comparison
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Solution Overview
Problem
Current methods for detecting erroneous connections between antenna ports and RF paths in smart antennas are time-consuming and require an operational wireless communication network or extra equipment to generate an uplink signal.
Innovation Solution
Measuring the amplitude and phase between antenna ports and comparing them to expected values to automatically detect connection errors, allowing for calibration and correction without the need for an uplink signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual checking of incorrect connections is performed, then connection errors can be detected, but the process becomes time-consuming and tedious
Solution Approach 1:
The system performs self-diagnosis by automatically measuring amplitude and phase between antenna ports and comparing results against expected values, enabling the base station to detect connection errors independently without manual intervention or external test equipment
Solution Approach 2:
The patent replaces manual mechanical connection checking with electronic measurement of amplitude and phase characteristics through RF signal transmission and digital signal processing, enabling automated detection without physical inspection
2Extent of automation
If uplink signal-based detection methods are used, then automatic connection error detection can be achieved, but the system requires an operational wireless communication network or extra equipment to generate uplink signals
Solution Approach 1:
The system performs connection verification during the installation and commissioning phase before normal network operations begin, using downlink signals and internal measurements to detect errors early without requiring operational uplink signals from user equipment
Solution Approach 2:
The patent introduces an internal calibration signal and measurement mechanism as an intermediary, allowing the base station to self-test connections using its own transmitted downlink signals rather than relying on external uplink signals from the network
3Measurement precision
If comprehensive amplitude and phase measurements are performed between all antenna ports, then connection errors can be accurately detected, but the measurement process becomes more complex
Solution Approach 1:
The measurement process is segmented into discrete steps: transmitting downlink signals from each antenna port, measuring amplitude and phase at receiving ports, comparing measurements against expected values stored in a table, and determining errors based on threshold comparisons, making the complex process manageable and systematic
Data Source
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AI summary
A device (110) receives consecutive negative acknowledgments (NACKs) (540), measures a downlink channel quality (530) associated with the device (110), and triggers autonomous retransmission (430) when power is limited in the device (110), when the device (110) is using a minimum usable enhanced dedicated channel (E-DCH) transport format combination (ETFC), and when one of a number of consecutive NACKs (540) is greater than a predefined number, or the measured downlink channel quality (530) is less than a predefined threshold.