End of Communication Detection Using Phase-Shifted Carrier Signal
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Solution Overview
Problem
Existing wireless communication systems face challenges in detecting the end of a communication efficiently, leading to increased manufacturing costs and complexity in decoder circuits.
Innovation Solution
A hardware-efficient apparatus is developed, comprising a carrier signal recovery circuit, a decoding circuit, and a detection circuit that uses a phase-shifted carrier signal to detect the end of communication, reducing the need for costly decoder adaptations and employing a single flip-flop circuit for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing wireless communication systems use traditional decoder circuits to detect the end of communication, then detection capability is achieved, but manufacturing costs increase and device complexity increases
Solution Approach 1:
The patent separates the end-of-communication detection function from the main decoder circuit by extracting it into a dedicated detection circuit. This segmentation allows the decoder to remain simple while the detection circuit handles the specialized task of detecting EOC indicators, thus reducing overall device complexity while maintaining detection reliability.
Solution Approach 2:
The patent introduces a phase-shifted carrier signal as an intermediary element to facilitate detection. By comparing the phase-shifted carrier signal with the received signal, the system can detect end-of-communication indicators without requiring complex decoder adaptations, thereby reducing manufacturing costs and circuit complexity.
2Measurement precision
If existing systems adapt decoder circuits to detect end of communication, then detection accuracy is improved, but manufacturing costs increase
Solution Approach 1:
The patent extracts the end-of-communication detection function from the complex decoder circuit and places it in a separate, simpler detection circuit. This extraction maintains detection accuracy by dedicating specific circuitry to the task while using straightforward comparison logic that is easier and less costly to manufacture than adapted decoder circuits.
Solution Approach 2:
The patent changes the detection approach from decoding-based parameter analysis to phase-comparison-based detection. By comparing the phase relationship between the carrier signal and the received signal, the system achieves accurate end-of-communication detection using simple parameter comparison rather than complex decoding operations, reducing manufacturing costs.
3Reliability
If complex decoder circuits are used for end of communication detection, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The detection circuit uses the phase-shifted carrier signal, which is already generated by the system's own signal recovery circuitry, to perform detection. This self-service approach eliminates the need for external or additional complex components, maintaining high detection reliability while minimizing device complexity through resourceful use of existing system elements.
Data Source
AI summary
An apparatus for detecting the end of a communication is disclosed. The apparatus includes an interface circuit for receiving an encoded signal and a carrier signal recovery circuit coupled to an output of the interface circuit. The carrier signal recovery circuit is configured to output a carrier signal of the encoded signal and a second signal that is out of phase with the carrier signal. The apparatus also includes a decoding circuit configured to decode the encoded signal as a function of both the encoded signal and the carrier signal output by the carrier signal recovery circuit. The apparatus also includes a detection circuit configured to detect an indication of an end of a communication in the encoded signal as a function of both the encoded signal and the second signal.