Scrambler Initial Value Assignment for EMI Reduction
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Solution Overview
Problem
Communication systems face challenges in reducing the risk of electro-magnetic interference (EMI) due to high-frequency electro-magnetic wave noises emitted during signal transmission.
Innovation Solution
The implementation of a transmitting device with multiple transmitters, each using a scrambler that performs a scrambling process on transmission data using randomly generated data based on unique initial values, and a receiving device with corresponding descramblers that use the same initial values for descrambling, ensuring that initial values of scramblers and descramblers are different between transmitters and receivers, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple transmitters use the same initial value for scrambling, then the device complexity is reduced, but electro-magnetic interference increases
Solution Approach 1:
Each transmitter is assigned a unique initial value specific to its identity, making the scrambling configuration locally differentiated. This ensures that while the overall system structure remains simple, each individual transmitter has a distinct scrambling characteristic that prevents EMI when multiple transmitters operate simultaneously.
2Object-affected harmful factors
If transmitters use different initial values for scrambling, then electro-magnetic interference is reduced, but the difficulty of coordinating transmitters and receivers increases
Solution Approach 1:
The transmitter automatically determines its own initial value based on its unique identity, and the receiver automatically determines the corresponding initial value based on its identity. This self-service mechanism eliminates the need for complex external coordination or manual configuration, allowing different initial values to be used without increasing coordination difficulty.
3Ease of operation
If the same initial value is used across all transmitters, then the ease of operation is improved, but the reliability of reducing EMI is compromised
Solution Approach 1:
The initial value parameter is changed for each transmitter based on its unique identity, while maintaining the same scrambling algorithm and structure. This parameter differentiation ensures that each transmitter produces distinct scrambled signals that do not interfere with each other, achieving both ease of operation (same algorithm) and reliability of EMI reduction (different parameters).
Data Source
AI summary
A transmitting device of the disclosure includes a plurality of transmitters each of which includes a scrambler that performs a scrambling process on transmission data by using random data generated on the basis of an initial value and that transmits the transmission data on which the scrambling process has been performed. An initial value of a first scrambler in a first transmitter is different from an initial value of a second scrambler in a second transmitter, and the first transmitter and the second transmitter belongs to the plurality of transmitters.