Single-Carrier Signaling With Nonlinear Power Amplifier Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices face limitations in transmission power, coverage area, and data rate due to the use of large power backoff values to avoid non-linear regions of power amplifier operation, leading to inefficient power usage and reduced signal quality.
Innovation Solution
Devices transmit power amplifier characteristics and backoff values for non-linear regions, enabling signaling with a single carrier waveform to operate in non-linear regions, allowing debiasing and nonlinearity corrections at the receiving end without additional complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large power backoff values are applied to avoid non-linear region of power amplifier, then reliability of signal transmission is improved, but transmission power and coverage area are reduced
Solution Approach 1:
The patent changes the operating parameters of the power amplifier by transitioning from linear region operation with large backoff values to non-linear region operation with reduced backoff values. This allows the system to operate at higher transmission power levels while managing signal quality through alternative means (coverage limitation to line-of-sight conditions) rather than relying solely on linear amplifier operation.
2Reliability
If large power backoff values are applied to avoid non-linear region of power amplifier, then signal quality is maintained, but coverage area range is limited
Solution Approach 1:
The patent changes the operational parameters by allowing non-linear power amplifier operation and adjusting the system to accommodate the resulting signal characteristics. This enables extended coverage area while managing signal quality through coverage limitation to line-of-sight conditions rather than relying on linear amplifier operation with large backoff values.
3Power
If power amplifier operates in non-linear region, then transmission power efficiency is improved, but signal distortion increases
Solution Approach 1:
The patent converts the harmful effect of non-linear operation (signal distortion) into a manageable condition by limiting coverage to line-of-sight scenarios where the distortion characteristics can be tolerated or compensated. The system accepts the distortion as a trade-off for achieving higher transmission power efficiency in appropriate deployment scenarios.
Solution Approach 2:
The patent applies different operational characteristics to different deployment scenarios by limiting non-linear operation to line-of-sight coverage areas. In these specific local conditions, the non-linear operation with reduced backoff values is acceptable, while other scenarios may continue to use linear operation. This spatial differentiation of operational modes allows the system to optimize power efficiency where appropriate.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A transmitting device may operate in a non-linear region of a power amplifier by reporting an indication of power amplifier characteristics and backoff values to a receiving device. The indication of the power amplifier characteristics and the backoff values may be based on power amplifier operation in the non-linear region of power amplifier characteristic curves. The transmitting device may transmit, to the receiving device, signaling using a single carrier waveform at a transmission power in the non-linear region of the power amplifier characteristic curves based on the indication. The receiving device may receive the signaling and use the power amplifier characteristics and the backoff values to perform debiasing and nonlinearity corrections to recover the original signaling.