Communication Interference Mitigation via Sub-channel Puncture and Power Adjustment
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Solution Overview
Problem
Existing communication systems in wireless local area networks face significant interference issues due to sideband interference from adjacent sub-channels, which can lead to reduced communication efficiency and increased errors, especially in dense frequency bandwidths.
Innovation Solution
The method involves configuring a payload in a normal transmission sub-channel, puncturing information in a punctured sub-channel, and adjusting the power level of a mitigation sub-channel to mitigate interference, which can be adjacent to the punctured sub-channel, using techniques like de-amplification to control interference leakage and meet specific spectral masks, compatible with OFDMA schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional modulation approaches are used with multiple carrier or subcarrier frequencies in sub-channels, then information can be conveyed efficiently, but sidebands or sub-channels interfere with signals in adjacent sub-channels
Solution Approach 1:
The patent extracts and removes the harmful sideband components from the transmitted signal. By identifying and eliminating these interfering sidebands, the system prevents them from causing damage to adjacent sub-channels while preserving the useful information in the main carrier signal.
Solution Approach 2:
The patent converts the potentially harmful sideband interference into a beneficial mechanism by using the sideband energy to create a mitigation signal. This mitigation signal is specifically designed to cancel out the interference in adjacent sub-channels, transforming the harmful byproduct into a useful interference cancellation tool.
2Object-generated harmful factors
If puncturing is applied to remove information in a sub-channel, then interference can be reduced, but communication throughput decreases
Solution Approach 1:
The patent applies local quality by selectively puncturing only specific sub-channels or portions of sub-channels where interference occurs, rather than removing all information uniformly. This localized approach maintains high throughput in clean sub-channels while eliminating interference in problematic areas, optimizing the trade-off between interference reduction and data transmission efficiency.
Solution Approach 2:
The patent changes the transmission parameters dynamically by adjusting which sub-channels are punctured and what mitigation signals are applied based on real-time interference conditions. This adaptive parameter modification allows the system to maximize throughput while minimizing interference according to actual channel conditions.
3Object-generated harmful factors
If mitigation sub-channels are added to address interference, then interference can be mitigated, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing the mitigation sub-channels to serve multiple purposes: they carry mitigation signals for interference cancellation, and can also be used for legitimate data transmission when interference is not present. This universal approach allows the same infrastructure to handle both interference mitigation and normal communication, reducing overall system complexity.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors interference levels and dynamically adjusts the mitigation signal strength and positioning. This closed-loop control allows the system to optimize interference cancellation performance while minimizing the complexity of signal processing by only activating mitigation functions when and where needed.
Data Source
AI summary
Presented systems and methods facilitate efficient and effective communication interference mitigation. In one embodiment, a method comprises: configuring a payload portion of information in a normal transmission sub-channel; puncturing information in a punctured sub-channel; adjusting a mitigation sub-channel use to mitigate interference associated with the punctured sub-channel; and transmitting the information in the normal transmission sub-channel, the punctured sub-channel, and the mitigation sub-channel.