Transceiver Array Local Oscillator Phase Synchronization
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Solution Overview
Problem
Conventional communication systems face challenges in synchronizing local oscillators across multiple chips of a transceiver array, leading to phase mismatch and reduced efficiency in beamforming and handoff processes between satellites.
Innovation Solution
A method for synchronizing local oscillators across multiple chips of a transceiver array using a clock distribution network and phase difference calculation, where the phase differences are determined and adjusted to ensure consistency across all circuits, reducing phase mismatch and improving beamforming and handoff efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If local oscillators are used across multiple chips of a transceiver array, then the transceiver array can perform beamforming and satellite communication functions, but phase mismatch occurs between oscillators leading to reduced efficiency
Solution Approach 1:
The system measures the phase difference between local oscillators on different chips and uses this feedback information to adjust the oscillators. A phase difference measurement circuit quantizes the phase difference and sends correction signals to adjust the local oscillators, creating a closed-loop feedback system that maintains phase consistency across the transceiver array.
Solution Approach 2:
The system changes the frequency or phase parameter of local oscillators based on measured phase differences. By adjusting the oscillator parameters dynamically, the system compensates for phase mismatches between different chips, ensuring consistent performance across the transceiver array.
2Reliability
If phase difference adjustment is implemented across multiple chips, then phase consistency is improved, but system complexity increases due to additional synchronization circuitry
Solution Approach 1:
The system introduces a phase difference measurement circuit as an intermediary component that quantizes phase differences and generates correction signals. This intermediary simplifies the control process by providing a standardized interface between the oscillators and the adjustment mechanism, making the synchronization system more manageable despite the added complexity.
3Reliability
If local oscillators are synchronized across chips, then communication reliability during satellite handoff is improved, but time is consumed in the synchronization process
Solution Approach 1:
The system performs phase synchronization continuously or periodically in advance of satellite handoff events. By maintaining ongoing synchronization between local oscillators, the system ensures that phase consistency is already established when handoff is needed, eliminating the need for time-consuming synchronization during the actual handoff process.
Data Source
AI summary
Aspects of methods and systems for transceiver array synchronization are provided. An array based communications system comprises a plurality of transceiver circuits and an array coordinator. Each transceiver circuit of the plurality of transceiver circuits comprises a plurality of wireless transmitters and a local oscillator generator. Each wireless transmitter of the plurality of wireless transmitters is able to modulate a local oscillator signal from the local oscillator generator based on a weighted sum of a plurality of digital datastreams. The array coordinator is able to adjust a phase of a first local oscillator signal based on a phase difference between the first local oscillator signal and a second local oscillator signal. The first local oscillator signal is generated by a first local oscillator generator of a first transceiver circuit. The second local oscillator signal is generated by a second local oscillator generator of a second transceiver circuit.