Interference Cancellation Using Antenna Signal Alignment
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Solution Overview
Problem
Radio frequency (RF) communication systems face interference issues such as co-site, self, and intentional interferences, which degrade their performance by interrupting or limiting effective communication.
Innovation Solution
A system utilizing a pair of spatially separated antennas with time delay units and power gain adjustment mechanisms to align modified signals in time and power levels, generating nulls to cancel interference, with a control circuit determining optimal time delays and power gains to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple time delay units and control circuits are used to align signals from spatially separated antennas, then interference cancellation capability is improved, but device complexity increases
Solution Approach 1:
The system divides the interference cancellation function into separate processing channels, with each antenna signal being independently processed through its own time delay unit and power gain adjustment mechanism. This segmentation allows precise control of each signal path while maintaining overall system functionality through modular architecture.
Solution Approach 2:
The system employs dynamic time delay adjustment and power gain control through feedback mechanisms. The control circuit continuously monitors the combined signal and adjusts the time delay and power gain parameters in real-time to optimize interference cancellation, making the system adaptive to changing interference conditions.
2Reliability
If time delay and power gain adjustments are applied to align signals, then interference cancellation is enhanced, but processing time increases
Solution Approach 1:
The system pre-calculates and stores optimal time delay and power gain values based on known interference characteristics. When interference is detected, the system can quickly retrieve and apply pre-computed parameters, significantly reducing the processing time required for interference cancellation while maintaining effectiveness.
Solution Approach 2:
The control circuit implements a feedback mechanism that continuously monitors the output signal quality and dynamically adjusts time delay and power gain parameters. This closed-loop control enables real-time optimization of interference cancellation without requiring lengthy processing sequences, as the system adapts iteratively to achieve optimal cancellation.
Data Source
AI summary
Embodiments of the inventive concepts disclosed herein are directed to a system for cancelling interference. The system may include a first antenna and a second antenna spatially separated from the first antenna. The system may include a first time delay unit, coupled to the first antenna, and configured to apply a first time delay and first power gain on a first signal received by the first antenna. The system may include a control circuit, coupled to the first time delay unit, and configured to determine the first time delay and first power gain to cause a modified version of the first signal and a second signal, received by the second antenna, to be aligned in time and power levels.