Wireless Signal Multiplexing With Start-Symbol Alignment
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Solution Overview
Problem
The presence of non-data signals in wireless communications systems detrimentally affects the transmission and reliability of data signals, complicating their decoding due to phase discontinuity caused by temporal overlap.
Innovation Solution
Techniques for aligning and modifying data and non-data signals to enable simultaneous transmission, including aligning starting symbols and adjusting signal lengths, and utilizing DMRS patterns for filtering and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-data signals are transmitted simultaneously with data signals, then system functionality is enhanced (energy harvesting, artificial noise), but data signal reliability deteriorates due to phase discontinuity
Solution Approach 1:
The patent applies preliminary action by aligning the starting symbols of non-data signals with data signals before transmission. This pre-alignment ensures phase continuity throughout the overlapping transmission period, preventing phase discontinuity that would otherwise degrade data signal reliability. The alignment is performed in advance based on scheduling information received from the network.
Solution Approach 2:
The patent changes the temporal parameters of non-data signals by adjusting their starting symbols and durations to match data signal characteristics. This parameter alignment transforms the transmission timing of non-data signals, ensuring they maintain phase continuity with data signals during simultaneous transmission, thereby resolving the reliability issue while preserving system functionality.
2Stability of the object's composition
If non-data signals are transmitted separately from data signals, then phase continuity is maintained, but transmission efficiency deteriorates due to resource underutilization
Solution Approach 1:
The patent merges the transmission of non-data signals with data signals by aligning their starting symbols and allowing temporal overlap. This combining enables simultaneous transmission on the same time-frequency resources, improving transmission efficiency and resource utilization while maintaining phase continuity through careful synchronization of the signal start points.
Solution Approach 2:
The patent performs preliminary alignment of non-data signal starting symbols with data signal starting symbols before transmission. This pre-synchronization ensures that when both signals are transmitted simultaneously, they maintain phase continuity throughout the overlapping period, enabling resource sharing without compromising signal stability.
3Productivity
If non-data signals are aligned with data signals, then simultaneous transmission is enabled, but signal modification complexity increases
Solution Approach 1:
The patent modifies the temporal parameters (starting symbols and durations) of non-data signals to align with data signals. This parameter adjustment enables simultaneous transmission while maintaining a relatively simple modification process, as it primarily involves timing adjustments rather than complex signal processing changes.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A wireless device may receive scheduling information that schedules temporally overlapping transmissions by the wireless device of a data signal and an additional signal, where the additional signal includes an artificial noise signal, an energy signal associated with an energy-harvesting device, or both. The wireless device may then align a starting symbol of the additional signal with a starting symbol of the data signal based on the data signal and the additional signal being scheduled to temporally overlap, and may transmit the data signal and the additional signal based on the aligning.