Spreading Code Apparatus for High-Speed Human Body Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spreading code methods struggle with low data transmission rates and difficulty in controlling output signal transmission rates across multiple clock frequencies, particularly in phase modulation systems, which affects communication speed and network formation in high-speed data transmission applications like human body communication.
Innovation Solution
A spreading code producing apparatus that utilizes serial-to-parallel converters, spreaders, phase shifters, multiplexers, and bit selectors to generate and combine spreading codes, ensuring orthogonality and increasing data transmission rates by modulating signals across multiple sub-channels, with phase shifters using exclusive OR gates to align and reverse phases, allowing for higher clock frequency compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spreading codes are used to raise transmission speed, then communication can be performed with weak signals and strong noise resistance, but data transmission rate remains low
Solution Approach 1:
The spreading code generation process is segmented into multiple independent spreaders (first spreader, second spreader, third spreader) that operate in parallel. Each spreader generates spreading codes with specific properties, and their outputs are combined through multiplexers to achieve both noise resistance and high transmission rate. This segmentation allows the system to maintain the reliability benefits of conventional spreading codes while overcoming the low data rate limitation.
2Productivity
If a plurality of spreaders are used to increase data transmission rate, then more information can be transmitted, but controlling transmission rate according to multiple clock frequencies becomes difficult
Solution Approach 1:
The system employs dynamic control mechanisms where multiplexers selectively combine outputs from multiple spreaders based on clock frequency requirements. The transmission rate is dynamically adjusted by controlling which spreader outputs are multiplexed and at what rates, allowing flexible adaptation to different clock frequencies without requiring complex reconfiguration of the entire system. This dynamic approach simplifies transmission rate control while maintaining high data transmission capability.
3Productivity
If spreading codes are shortened and combined through multiple spreaders to raise transmission rate, then data transmission speed increases, but maintaining orthogonality becomes challenging
Solution Approach 1:
Each spreader is designed to generate spreading codes with specific local properties that ensure orthogonality is maintained at the individual spreader level. The first spreader, second spreader, and third spreader each produce codes with controlled characteristics, and the multiplexing process preserves these orthogonality properties. This local quality control approach ensures that even when codes are shortened and combined, the essential orthogonality required for reliable signal separation is maintained.
Data Source
AI summary
This invention relates to spreading code producing apparatus, which comprises: two phase shifters for spreading code which receive bits for determining spreading codes and phase information and producing spreading codes; and multiplexers which receive two spreading codes produced said two phase shifters for spreading code, receive bits through separate way which defines outputting order of the received two spreading codes and produce spreading codes with same length as said received two spreading codes. Therefore, many information using few spreading codes can be transmitted so that data transmission rate can be raised. Furthermore, communication service with high speed can be performed among communication devices using human body communication etc.