Coded Wave Separation for Multi-Transmitter Object Detection
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Solution Overview
Problem
The challenge in existing detection systems is the mixing of waves emitted from multiple transmitters, making it difficult to identify the transmission source and reflection position, which hinders high-speed object detection using multiple transmitters and receivers.
Innovation Solution
A detection device that generates modulated waves using pulse train groups and carrier waves with unique code groups, allowing for the separation of individual data at each transmitter-receiver combination through demodulation and deconvolution processes, enabling high-speed object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple transmitters emit waves simultaneously, then detection speed is improved, but wave mixing occurs making it difficult to identify transmission sources
Solution Approach 1:
The patent segments the transmitted waves by assigning unique code groups (including reference codes and individual codes) to each transmitter. This segmentation allows receivers to distinguish between multiple simultaneous transmissions through code-based identification, resolving the wave mixing problem while maintaining high detection speed
Solution Approach 2:
The patent changes the code parameters (reference code and individual code combinations) for each transmitter to enable identification. By modulating waves with distinct code groups, the system allows simultaneous transmission without loss of transmission source identification capability
2Loss of information
If transmitters emit waves at different timings to prevent mixing, then transmission source identification is improved, but detection speed deteriorates
Solution Approach 1:
The patent employs periodic pulse train groups with specific timing structures that allow simultaneous transmission. The periodic nature of the coded pulses enables receivers to separate and identify individual transmitter signals through correlation processing, achieving both high speed and accurate identification
Solution Approach 2:
By changing the code parameters (reference code and individual code assignments) for each transmitter, the system enables simultaneous wave emission without mixing. The unique parameter combinations allow each transmitter to be identified even when emitting waves at the same time
3Measurement precision
If multiple code groups with reference codes and individual codes are used, then wave separation capability is improved, but device complexity increases
Solution Approach 1:
The code structure is segmented into reference codes (common to all transmitters) and individual codes (unique to each transmitter). This segmentation enables efficient wave separation through correlation processing while keeping the overall system manageable through modular code design
Solution Approach 2:
The reference code serves a universal function across all transmitters, providing a common basis for correlation processing. This multi-functionality reduces complexity by using a shared reference structure while individual codes provide the necessary differentiation for transmitter identification
Data Source
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AI summary
A detection device (100) includes: a generator (101) that generates a plurality of waves; a plurality of transmitters (102) that emit the plurality of waves, the plurality of waves each being emitted by a corresponding one of the plurality of transmitters (102); a plurality of receivers (103) each of which receives one or more of the plurality of waves as a composite wave; a deriver (104) that derives individual data for each combination of one of the plurality of transmitters (102) and one of the plurality of receivers (103) by deriving, from received data of each of the plurality of receivers (103), the individual data corresponding to each of the plurality of transmitters (102); and a detector (105) that detects an object that affects at least one of the plurality of waves, according to the individual data.