CDMA Positioning via Orthogonal Code Sequences
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Solution Overview
Problem
Existing methods for determining the spatial position of objects, such as in navigation or game systems, often require complex data transmission and processing, which can be inefficient and prone to errors, especially in environments where rapid position updates are needed.
Innovation Solution
A CDMA-based system using orthogonal code sequences transmitted via multiple antennas, where each sequence is uniquely assigned to an antenna, allowing a CDMA receiver to determine its position by identifying the received sequences and accessing an allocation table to derive spatial coordinates, with optional energy supply through inductive means and contactless interfaces like RFID or Bluetooth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex data transmission and processing methods are used for position determination, then position information can be obtained, but the system becomes inefficient and prone to errors
Solution Approach 1:
The patent extracts only the essential position information from the transmitted data by using correlation detection of known code sequences. Instead of processing complex data packets, the receiver extracts position data by detecting which antenna's code sequence is present in the received signal, significantly simplifying the processing while maintaining accuracy.
Solution Approach 2:
The system uses code division multiple access (CDMA) where each antenna transmits a unique code sequence. The receiver copies the known code sequences and uses correlation detection to identify which antenna's code is present, enabling simple and reliable position determination without complex processing of the actual position data.
2Productivity
If rapid position updates are implemented, then real-time tracking is achieved, but the system becomes more complex and error-prone
Solution Approach 1:
The patent implements periodic transmission of code sequences from multiple antennas at fixed time intervals. This periodic action enables continuous position updates at a predetermined rate without requiring complex real-time processing, as the system simply detects which antenna codes are present in each periodic update cycle.
3Productivity
If minimal technical effort and latency are used for position determination, then efficiency is improved, but measurement precision may be compromised
Solution Approach 1:
The patent replaces complex mechanical or computational position determination systems with a signal processing approach using CDMA and correlation detection. This substitution allows minimal technical effort and low latency while maintaining high precision, as the correlation detection method is computationally simple yet highly accurate in identifying signal sources.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate determination of object positions with minimal technical effort and latency, suitable for applications like board games or navigation systems, allowing for continuous location tracking and data processing with reduced complexity.
Implementation Method 1
A CDMA-based system using orthogonal code sequences transmitted via multiple antennas
Implementation Method 2
optional energy supply through inductive means
Data Source
AI summary
A roulette table, including an electronic system having at least one electronic circuit, a number of M antennas, a Code Division Multiple Access (CDMA) transmitter for sending a number of M orthogonal code sequences via the antennas, and a contactless communication interface for receiving the position from an electronic memory of the electronic circuit, in which the antennas are arranged below stake fields of the roulette table, and having chips, in which each chip is equipped with an electronic circuit. The electronic circuit includes the following: a CDMA receiver for receiving a number of M orthogonal code sequences; an electronic memory for storing an allocation instruction, through the allocation instruction each code sequence is assigned to one of the antennas, with this allocation containing information regarding the spatial location of the respective antenna; a processor for accessing the electronic memory to determine the position of the electronic circuit relative to the antennas by determining, with the help of the code sequences received from the CDMA receiver, the information regarding the spatial locations of those antennas by which the code sequences were received, and by deriving from the detected spatial locations of the antennas the position of the electronic circuit and producing a position signal therefrom; and a contactless communication interface for transmitting the position signal.