Modem Signal Length Validation for Noise Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communications modems often receive noise due to electromagnetic coupling or analog circuit operations, leading to digital processing faults and increased reception failures, especially when the time difference between noise and signal input is short.
Innovation Solution
An apparatus and method that include a communications signal identifying unit to sample signals at regular intervals, detect patterns corresponding to the start and end of communication, and deliver a data process stopping signal if the communication length is shorter than a reference length, preventing unnecessary data reading and initialization of the modem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communications modem continuously reads data without signal validation, then the data reading operation proceeds without interruption, but noise is misidentified as valid communication signal causing digital processing faults
Solution Approach 1:
The system performs preliminary validation of the received signal before the modem begins data reading operations. The signal length is measured and compared against a reference threshold in advance, ensuring that only valid communication signals are processed. This preliminary check prevents noise from being misidentified as valid signal, thereby improving reliability without requiring complex continuous validation during data reading.
2Productivity
If the modem processes short signals as valid communication, then data reading continues without stopping, but processing time is wasted on noise causing increased reception failures
Solution Approach 1:
The system implements a feedback mechanism where the measured signal length is compared against a reference length threshold. When the signal length is shorter than the reference, a determination is made that the signal is likely noise, and the data reading operation is stopped. This feedback loop ensures that the modem only processes valid communication signals, improving both productivity by avoiding wasted processing and reliability by reducing reception failures caused by noise.
3Adaptability or versatility
If the system initializes the modem for every received signal, then the modem is prepared for potential communication, but time is lost due to frequent initialization caused by noise detection
Solution Approach 1:
The system performs preliminary signal validation by measuring signal length against a reference threshold before triggering modem initialization. Only signals that meet the minimum length requirement are considered valid communication signals worthy of initialization. This prevents frequent unnecessary initialization caused by noise detection, reducing time loss while maintaining the modem's adaptability to respond to valid communication signals.
Data Source
AI summary
An apparatus for identifying a communications signal in a preceding stage for a communications modem includes a communications signal identifying unit configured to receive a communications signal through a port, deliver data included in the communications signal to a communications modem, and sample the communications signal which has passed through the port during every unit length to detect a unit length pattern corresponding to a start of communication and a unit length pattern corresponding to an end of communication. When a length from the start of communication to the end of communication is equal to or smaller than a reference length, the communications signal identifying unit delivers a data process stopping signal to the communications modem such that the communications modem stops a data reading operation.