Power Adjustment Unit for Multi-Antenna Wireless Systems
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Solution Overview
Problem
Modern wireless communication networks face challenges with antenna power management, particularly in time division duplexing (TDD) systems, where operating multiple antenna elements at different power levels can lead to power amplifier clipping and inefficiency due to high peak-to-average power ratio (PAPR), affecting signal distortion and system performance.
Innovation Solution
A network component with multiple output ports and a power adjustment unit that scales power signal components in the frequency domain to maintain output power below a threshold, ensuring efficient transmission and reducing signal distortion by adjusting power levels based on receiving network component location, quality of service, and channel state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If different antenna elements are operated at different power levels to improve beam forming performance, then signal strength at target location is increased, but power amplifier clipping and signal distortion occur
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the power levels of individual antenna elements based on their specific characteristics and the transmission requirements. The system modifies power signal components in the frequency domain to optimize the balance between signal strength and avoid clipping, rather than using fixed power levels for all antenna elements.
Solution Approach 2:
The system implements dynamics by enabling adaptive power control where the power amplifier can adjust its operating parameters in real-time based on feedback about clipping conditions and signal quality. This allows the system to respond to changing transmission conditions and maintain optimal performance without fixed power settings.
2Reliability
If power amplifier operates well below maximum transmission power to avoid clipping, then signal distortion is reduced, but system efficiency decreases
Solution Approach 1:
The system changes the operating parameters of individual antenna elements dynamically, allowing each element to operate at its optimal power level rather than a conservative fixed level. This enables the power amplifier to utilize its full capacity when conditions permit while avoiding clipping through intelligent power management.
Solution Approach 2:
The patent implements feedback mechanisms that monitor the operation of power amplifiers and adjust power levels accordingly. By detecting clipping conditions and signal quality metrics, the system can adjust power levels to maximize efficiency while maintaining signal integrity, rather than operating at reduced levels without feedback.
3Productivity
If different power levels are used for different antenna elements, then beam forming performance is improved, but peak-to-average power ratio increases causing amplifier issues
Solution Approach 1:
The system applies parameter changes by optimizing the power distribution across different antenna elements in the frequency domain. The power signal components are adjusted to achieve the desired beam forming pattern while controlling the peak-to-average power ratio to prevent amplifier issues.
Solution Approach 2:
The patent operates in the frequency domain to manage power distribution, adding a dimensional approach to power management. By processing and adjusting power signal components in the frequency domain rather than directly in the time domain, the system can optimize beam forming while controlling peak power levels more effectively.
Data Source
AI summary
There is provided a network component of a wireless communication network. The network component includes at least two output ports, each output port being associated with an antenna. The network component further includes a controller for providing a power signal set having at least two power signal components, each power signal component being associated with one of at least two output ports and being indicative of a power portion to be provided to its associated antenna for generating a transmission to a receiving network component of the wireless communication network. Further, the network component includes a power adjustment unit for scaling power signal components of the power signal set, thereby providing a scaled power signal set.