Wireless Receiver Sensitivity Control for Microwave Interference
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Solution Overview
Problem
The proliferation of IoT devices in smart homes and businesses leads to increased interference in wireless networks, particularly in the 2.4 GHz band used by Wi-Fi and Bluetooth, causing packet loss, latency, and disconnections due to coexistence or co-location with high-power devices like microwave ovens, making it impractical to shut off these networks.
Innovation Solution
A wireless communication device and method that includes an integrated circuit with a receiver and transmitter, coupled with a processor to identify and mitigate interference by reducing receiver sensitivity at interfering frequencies, allowing communication to continue without significant impact on cost, complexity, or performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If Wi-Fi or BT networks are shut off when an interfering device is operating, then interference is eliminated, but network availability and usability are significantly reduced
Solution Approach 1:
The receiver sensitivity is dynamically adjusted based on the detected interference conditions. The system transitions from a static sensitivity setting to a dynamic one that adapts to the presence of microwave oven interference, allowing the network to remain available while mitigating the harmful effects of interference through real-time sensitivity modification.
Solution Approach 2:
The system changes the operational parameters of the receiver by modifying its sensitivity level when interference is detected. This parameter change allows the receiver to operate in a reduced sensitivity mode during microwave oven operation, preventing packet loss without requiring complete network shutdown, thus maintaining network availability.
2Object-affected harmful factors
If receiver sensitivity is reduced to mitigate interference, then packet loss is reduced, but communication reliability at normal conditions deteriorates
Solution Approach 1:
The system periodically monitors for interference conditions and adjusts receiver sensitivity accordingly. During normal conditions without microwave oven interference, the receiver operates at full sensitivity for optimal reliability. When interference is detected, sensitivity is reduced to mitigate packet loss. This periodic adjustment ensures high reliability during normal operation while protecting against interference when it occurs.
Solution Approach 2:
The system implements a feedback mechanism where the receiver continuously monitors for interference signals and adjusts its sensitivity based on the detected conditions. This closed-loop control ensures that sensitivity is only reduced when necessary (when interference is present), maintaining high communication reliability during normal conditions while preventing packet loss during microwave oven operation.
3Reliability
If interference mitigation techniques are implemented, then network performance during interference improves, but device complexity increases
Solution Approach 1:
The interference mitigation function is extracted as a separate, dedicated component within the transceiver architecture. Rather than distributing interference detection and sensitivity adjustment logic throughout the entire system, the patent implements a focused interference management module that specifically handles microwave oven interference, thereby limiting the increase in overall device complexity to only the necessary components for this specific function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces interference by allowing wireless devices to operate at reduced sensitivity during interference, maintaining network performance and minimizing disruptions, even when coexistent or co-located with interfering devices.
Implementation Method 1
a receiver coupled to an antenna, the receiver configured to sense pulses of electromagnetic radiation and decode signals received therein
Implementation Method 2
a transmitter coupled to the antenna and configured to encode and transmit signals as electromagnetic radiation from the antenna
Data Source
AI summary
A wireless communication device and method for operating the same for mitigating interference in a wireless communication network are provided. Generally, the method includes sensing with the wireless communication device pulses of electromagnetic radiation recurring within a band of frequencies used by the device for communication of signals, identifying the pulses as interference, and determining a number of frequencies of the interference within the band of frequencies used by the wireless communication device. Next, a sensitivity of the wireless communication device is reduced upon sensing one of the pulses and repeated at a frequency corresponding to the frequency of the interference. Thus, a spectrum of electromagnetic radiation around the wireless communication device is perceived by the device as free of interference, enabling it to transmit and/or receive more often. Other embodiments are also disclosed.