Noise Cancellation in Electronic Devices via USB3.0 Signal Subtraction
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Solution Overview
Problem
Devices compatible with the USB3.0 standard cause noise interference due to high frequency operations, leading to signal distortion and decreased signal-to-noise ratio during wireless communications like WiFi or Bluetooth, as they operate at frequencies that overlap with the USB3.0 baseband frequency.
Innovation Solution
An electronic device with a noise-estimation apparatus that subtracts a predetermined synchronization preamble from the baseband signal to generate a noise-estimation signal, which is then used to filter out noise, utilizing components such as a coupler, noise-estimation apparatus, assembly unit, and auto-gain controller to improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If USB3.0 devices operate at high frequency (5 Gbps), then data transmission speed is improved, but noise interference increases and causes signal distortion in wireless communications
Solution Approach 1:
The patent captures the noise signal generated by USB3.0 operations and uses it as a reference to create a cancellation signal. By processing the captured noise through subtraction operations, the system converts the harmful noise into a beneficial cancellation signal that eliminates the interference from the wireless communication signal, thereby resolving the contradiction between high-speed USB3.0 transmission and wireless communication quality
Solution Approach 2:
The patent introduces a coupler as an intermediary device that captures the noise signal from the USB3.0 operation without interfering with the high-speed data transmission. This intermediary mechanism allows the noise to be extracted and processed for cancellation purposes while maintaining the beneficial high-speed transmission function
2Adaptability or versatility
If USB3.0 operates simultaneously with WiFi or Bluetooth, then device functionality is improved, but signal-to-noise ratio decreases due to frequency overlap
Solution Approach 1:
The system utilizes the noise generated during simultaneous USB3.0 and wireless operations as a reference signal. By capturing and processing this noise through subtraction, the system converts the harmful interference into a beneficial cancellation mechanism, allowing multiple functions to operate simultaneously while maintaining reliable signal quality
Solution Approach 2:
The patent performs noise capture and cancellation operations in advance of the actual wireless communication signal processing. By pre-capturing the USB3.0 noise signal and preparing the cancellation signal beforehand, the system ensures that noise removal is already in place when wireless communications occur, maintaining signal-to-noise ratio during simultaneous operations
Data Source
AI summary
The present invention provides an electronic device including a coupler, a noise-estimation apparatus and an assembly unit. The coupler receives a baseband signal. The noise-estimation apparatus receives the baseband signal and subtracts a predetermined synchronization preamble from the baseband signal to obtain a noise-estimation signal, and the predetermined synchronization preamble is a transmission signal that conforms to the standards of 802.11bg and/or IEEE 802.11n. The assembly unit receives the baseband signal and subtracts a noise-estimation signal from the baseband signal to obtain an output signal.