Terminal Signal Timing Synchronization Using Frame Phase Inversion
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Solution Overview
Problem
Existing synchronization techniques for wireless communication between terminals often require specialized hardware and negatively impact data transmission rates.
Innovation Solution
A system and method for synchronizing signal timing between terminals using a phase inversion module to periodically invert the phase of a signal at a frame interval, allowing the first terminal to determine transmission timing by measuring discrepancies between phase inversion points and frame beginnings, and applying timing adjustments as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing synchronization techniques (preambles, packet counters, dedicated pilots) are used, then signal timing can be synchronized between terminals, but specialized hardware is required and data transmission rates are negatively impacted
Solution Approach 1:
The system uses the existing signal transmission and reception mechanisms to perform synchronization. The second terminal automatically generates phase inversion points using its own clock and transmits them back, allowing the first terminal to measure timing discrepancies without requiring external specialized synchronization hardware. The terminals utilize their existing transmit/receive paths and clock mechanisms to achieve mutual synchronization.
Solution Approach 2:
The patent changes the phase parameter of the signal by inverting it at specific time intervals (frame boundaries) generated by the second terminal's clock. This phase modulation creates detectable timing markers without adding specialized hardware. The phase inversion transforms time information into phase information, enabling timing measurement using existing signal processing capabilities.
2Reliability
If existing synchronization techniques are used, then signal timing can be synchronized, but data transmission rates are negatively impacted
Solution Approach 1:
The system implements periodic phase inversion at frame boundaries rather than continuous synchronization signals. The second terminal inverts the phase of the received signal at regular intervals (frame boundaries) and transmits these inverted signals back. This periodic action creates synchronization opportunities without requiring continuous dedicated synchronization traffic, thereby minimizing impact on data transmission rates.
Solution Approach 2:
The synchronization process is integrated into the existing continuous signal transmission. The phase inversion is applied to the ongoing signal stream at frame boundaries, and the timing information is extracted from the returned signal. This allows synchronization to occur continuously alongside data transmission without interrupting or dedicating separate channels, maintaining productive use of the communication link.
Data Source
AI summary
Systems, methods, and terminals for synchronization of signal timing between a first terminal and a second terminal are provided herein. The system and method includes transmitting a signal from a first terminal to a second terminal, the signal comprising a phase and a plurality of frames, receiving the signal at the second terminal, periodically inverting the phase of the signal at the frame interval to produce an inversion coded signal comprising at least one phase inversion point, transmitting the inversion coded signal from the second terminal to the first terminal, receiving the inversion coded signal at the first terminal, and determining transmission timing of the signal from the first terminal to the second terminal by measuring a timing discrepancy between the at least one phase inversion point and a start time of a next frame.