Frequency-Shift Keying Command Transmission Logic
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Solution Overview
Problem
Existing methods for transmitting command combinations via coded frequency-shift keying often result in errors and inefficient frequency usage, leading to spurious initiations and wide frequency ranges, which can be disadvantageous for rapid and reliable communication.
Innovation Solution
A method where the first frequency to be transmitted in a frequency pair is chosen based on at least one other associated frequency pair during command changes, allowing for efficient use of a narrower frequency band and preventing undesirable command combinations, with the option to insert frequencies or pauses for increased transmission capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency pairs are allocated to each command combination without selection rules, then all command combinations can be transmitted, but errors and spurious initiations occur due to ambiguous frequency sequences
Solution Approach 1:
The patent applies dynamics by making the first frequency of the frequency pair dynamic rather than static. Instead of always transmitting frequencies in a fixed order (f1, f2), the system dynamically selects which frequency to transmit first based on the current command state and desired next command. This dynamic selection prevents ambiguous frequency sequences that could be misinterpreted as different command combinations, thereby eliminating spurious initiations while maintaining reliable transmission.
2Adaptability or versatility
If a wide frequency range is used to cover many command combinations, then more commands can be transmitted, but the frequency band becomes inefficiently used
Solution Approach 1:
The patent applies parameter changes by dynamically changing the transmission order parameter (which frequency is transmitted first) rather than changing the frequency range. By altering the sequence parameter based on the current command state, the system can efficiently encode multiple command combinations within a limited frequency band. This approach increases command combination capacity without requiring a wider frequency range, thereby improving frequency band efficiency and reducing energy loss.
3Reliability
If pauses are inserted between command combinations to maintain sequence integrity, then transmission accuracy improves, but total transmission time increases considerably
Solution Approach 1:
The patent applies preliminary action by pre-defining frequency pair associations with commands and establishing selection rules before transmission begins. The system prepares the frequency selection logic in advance based on the current command state, so that the correct frequency sequence is automatically selected during transmission without requiring pauses or interruptions. This preliminary preparation ensures command sequence accuracy while maintaining continuous, rapid transmission.
4Reliability
If frequency selection is based on previous frequency pairs, then transmission reliability improves, but the system complexity increases
Solution Approach 1:
The patent applies local quality by making the frequency selection logic context-specific rather than globally complex. The selection rules are tailored to the local transmission state (current command and desired next command), applying simple, localized decision logic at each transmission step. This approach ensures unambiguous transmission through context-appropriate frequency selection without requiring a globally complex system, as each local decision is based on straightforward rules specific to the current transmission context.
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
This approach ensures reliable and unambiguous transmission of commands or command combinations, optimizing frequency usage and reducing errors, while allowing for a higher number of transmissions within a limited frequency band.
Implementation Method 1
Method and apparatus for transmission of command combinations by coded frequency-shift keying
Data Source
AI summary
A method is disclosed for transmission of commands or command combinations via a communication link by coded frequency-shift keying. Each command or command combination is associated with one frequency pair. When a command changes from a preceding command or command combination to a subsequent command or command combination, one frequency (which will be the first to be transmitted) in the frequency pair of the subsequent command or command combination is chosen as a function of at least one other associated frequency pair.