Dual-Polarized Phased Array Phase Alignment for Stable H/V Power
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Solution Overview
Problem
In dual-polarized phased array systems for 5G mmWave communication, maintaining stable combined power and constant relative phase between horizontal (H) and vertical (V) polarized signals is challenging due to phase fluctuations caused by LO signal distribution, leading to power instability and inefficiency.
Innovation Solution
A communication device with multiple transceiver modules and a processor that generates and adjusts RF signals based on calibration information to align phases, using separate LO generation blocks and phase shifters to ensure phase alignment before transmission, and storing calibration settings for optimal power alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If separate LO generation blocks are used for H and V polarized signals, then device complexity is reduced and power consumption is lowered, but phase consistency between H and V signals deteriorates
Solution Approach 1:
The patent performs preliminary phase calibration by measuring the phase difference between H and V polarized signals using a third transceiver module, then stores calibration information (phase offset values) in advance. This preliminary action ensures that when separate LO generation blocks are used, the phase consistency is restored through pre-computed correction values, resolving the contradiction between simplified LO structure and phase stability.
Solution Approach 2:
The patent implements a feedback mechanism where the third transceiver module continuously monitors the phase difference between H and V signals, and the processor adjusts the calibration information based on measured phase deviations. This closed-loop feedback ensures that phase consistency is maintained despite using separate, simpler LO generation blocks, thereby resolving the contradiction between device complexity and phase stability.
2Measurement precision
If phase calibration is performed using multiple transceiver modules, then phase alignment accuracy is improved, but device complexity and operation complexity increase
Solution Approach 1:
The patent makes the third transceiver module multi-functional by using it for both normal communication and phase calibration measurements. The same hardware resource is utilized for dual purposes, eliminating the need for dedicated calibration hardware. This resolves the contradiction between high measurement precision and device complexity by making existing components serve multiple functions.
Solution Approach 2:
The system performs self-calibration using its own transceiver modules without requiring external calibration equipment. The third transceiver module measures the phase difference between H and V signals generated by the first and second modules, and the processor automatically computes and stores calibration information. This self-service approach achieves high phase alignment accuracy while avoiding additional device complexity from external calibration systems.
3Reliability
If real-time phase adjustment is implemented, then communication reliability is improved, but power consumption and operation complexity increase
Solution Approach 1:
The patent performs phase calibration in advance and stores the calibration information (phase offset values) for later use. During actual communication, the pre-computed calibration data is applied without real-time measurement and computation, significantly reducing power consumption while maintaining communication reliability through accurate phase alignment.
Solution Approach 2:
The patent changes the operational parameters of the transceiver modules based on stored calibration information, adjusting phase offsets to compensate for hardware variations. This parameter adjustment approach ensures reliable communication by maintaining correct phase relationships while avoiding the continuous power consumption associated with real-time active calibration.
Data Source
AI summary
A communication device, including a plurality of transceiver modules; a storage configured to store calibration information; and at least one processor configured to: generate a first dual-polarized RF signal by controlling a first transceiver module to generate a first RF signal based on the calibration information; measure, by a second transceiver module, a first signal power of the first dual-polarized RF signal; adjust a parameter of the first transceiver module, and generate a second dual-polarized RF signal by controlling the first transceiver module to generate a second RF signal based on the adjusted parameter; measure, by the second transceiver module, a second signal power of the second dual-polarized RF signal; and generate an aligned dual-polarized RF signal by controlling the plurality of transceiver modules to generate a plurality of RF signals based on a result of a comparison between the first signal power and the second signal power.