Bit Stream Converter for USB Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The USB 3.0 Gen1 communication protocol causes significant interference in the 2.5 GHz band during data transmission, which can impact data throughput and limit the effective transmission range for Wi-Fi or Bluetooth communications.
Innovation Solution
A communication device and host system that utilize a bit stream converter to perform bit extension on USB communication bit streams, shifting the frequency band affected by USB communication to avoid interference with wireless communication bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If USB 3.0 Gen1 uses 5 Gbps transmission with scrambling and spread spectrum techniques, then electromagnetic interference is mitigated, but significant interference is caused in the 2.5 GHz band affecting wireless communications
Solution Approach 1:
The patent applies parameter changes by modifying the bit stream characteristics through bit extension, which changes the frequency content of the USB transmission. By extending bits (repeating them multiple times), the signal's spectral distribution is altered, reducing energy concentration in the 2.5 GHz band while maintaining USB communication functionality.
Solution Approach 2:
The system dynamically adjusts the bit extension ratio based on detected wireless communication activity. When wireless communications are detected in the 2.4 GHz band, the bit extension mechanism is activated to shift USB transmission away from interfering frequencies. This dynamic adaptation allows the system to respond to changing electromagnetic environment conditions.
2Object-affected harmful factors
If bit extension is applied to USB bit streams, then the number of consecutive 0/1 transitions is reduced and frequency bands are altered, but communication throughput may be affected
Solution Approach 1:
The patent applies partial bit extension rather than complete bit repetition. By extending bits to a limited degree (not fully repeating them), the system achieves sufficient frequency shifting to avoid interference while minimizing the impact on data throughput. This partial action approach balances interference mitigation with communication efficiency.
Solution Approach 2:
The bit extension is applied periodically based on detected wireless communication activity rather than continuously. The system monitors the electromagnetic environment and activates bit extension only when interference is likely, allowing normal high-speed USB transmission to occur during interference-free periods, thus maintaining overall throughput.
Data Source
AI summary
A communication device includes: a wired communication circuit, a wireless communication circuit and a bit stream converter. The wired communication circuit is configured to exchange information with a host system via wired communication. The wireless communication circuit is configured to o exchange information with a wireless communication device via wireless communication. The bit stream converter is configured to selectively perform bit stream conversion on a bit stream between the communication device and the host system according to frequency band information corresponding to the wireless communication.