Chaotic Signal Delay Unit Multiplexing for Collision Avoidance
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Solution Overview
Problem
The complexity and cost of the structure required for delay units in chaotic signal-based multiple access systems increase with the number of subscribers, making it difficult to efficiently manage signal delays and prevent collisions in communication systems.
Innovation Solution
A method and apparatus using multiple delay units with different delay times for data and reference signals, where each subscriber has a unique combination of delay times, simplifying the structure and reducing costs by employing a multiplexer to control the signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple delay units with different delay times are used for each subscriber, then signal collision is prevented and multiple access is enabled, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple delay units into a single shared delay unit that is controlled by a subscriber identification signal. Instead of having separate delay units for each subscriber, the system uses one delay unit that is dynamically configured based on which subscriber is transmitting, thereby reducing device complexity while maintaining the ability to prevent signal collisions through appropriate delay timing.
Solution Approach 2:
The delay time of the shared delay unit is dynamically adjusted based on the subscriber identification signal. The system changes the delay parameter according to which subscriber is active, enabling the same physical hardware to provide different delay times for different subscribers, thus preventing collisions without requiring multiple fixed delay units.
2Productivity
If each subscriber has a unique delay time configuration, then efficient multiple access is achieved, but manufacturing cost increases
Solution Approach 1:
The shared delay unit is designed to serve multiple subscribers by accepting a subscriber identification signal that configures the appropriate delay time. This universal delay unit performs the function of multiple specialized delay units, reducing manufacturing costs while maintaining efficient multiple access capability for all subscribers.
Solution Approach 2:
The system changes the delay parameter of the shared delay unit based on the subscriber identification signal. By dynamically adjusting the delay time parameter rather than using hardware-specific delay units for each subscriber, the system achieves efficient multiple access without increasing manufacturing complexity or cost.
3Measurement precision
If chaotic signals with varying delay times are used, then signal discrimination between subscribers is improved, but signal processing complexity increases
Solution Approach 1:
The system uses a subscriber identification signal to control the delay unit configuration. This feedback mechanism ensures that the correct delay time is applied based on which subscriber is transmitting, improving signal discrimination while keeping the processing logic simple through automated control rather than complex manual configuration.
Data Source
AI summary
A method and apparatus for simplifying a structure needed to delay data in delay units when a reference signal and data are transmitted by using chaotic signals are provided. The method includes delaying data by at least two delay times, wherein each of the delay times occurs sequentially; multiplexing the data, which has been delayed, according to a control signal; and transmitting the data and a reference signal which corresponds to the data at an interval of delay time. The apparatus includes a first delay unit which is configured to delay data for a first delay time; a second delay unit which is configured to delay the data output from the first delay unit for a second delay time; and a multiplexer which is configured to multiplex the data from the first and second delay units according to a control signal.