Multi-Antenna Power Sensing with Delay-Based Leakage Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Signal coupling between antennas in multiple antenna wireless systems leads to reduced accuracy in power detection due to transmit leakage, affecting the accuracy of power output control in each antenna.
Innovation Solution
A delay element is used to differentiate the transmit signal from leakage signals captured by a coupler, and a combiner is employed to combine the delayed transmit signal with the combined signal, reducing correlation and improving power detection accuracy by suppressing leakage signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If power detection components are used to determine transmitted power output at each antenna, then power control capability is improved, but measurement precision deteriorates due to signal coupling between antennas
Solution Approach 1:
The patent segments the power detection process into two distinct paths: a main detection path that captures the desired transmit signal, and a separate leakage detection path that specifically captures coupled signals from adjacent antennas. By dividing the detection function into these separate segments, the system can independently process and differentiate between the desired signal and leakage signals, thereby maintaining measurement precision while preserving power control capability.
Solution Approach 2:
The patent introduces an intermediary processing stage that receives signals from both the main detection path and leakage detection path. This intermediary component processes the combined signals to separate and identify the desired transmit signal from the coupled leakage signals, acting as a mediator that resolves the measurement accuracy issue while maintaining the power control function.
2Productivity
If multiple antennas transmit different signals using MIMO technology, then system performance is improved, but signal coupling between antennas increases
Solution Approach 1:
The patent extracts the harmful leakage signals from the overall received signal by creating a dedicated detection path specifically for capturing coupled signals from adjacent antennas. By separating and extracting these harmful components, the system can identify and eliminate their interference, allowing multiple antennas to transmit different MIMO signals simultaneously without degrading system performance.
Data Source
AI summary
Representative implementations of devices and techniques provide transmit power detection for an antenna of a wireless system having two or more transmit antennas. A correlation is reduced between a transmit signal of the antenna and signals from other antennas.