Wireless Transmitter Interference Detection Timing Control
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Solution Overview
Problem
Conventional wireless communication systems struggle to suppress demodulation errors caused by interference signals, especially when these signals arrive at random times, leading to reduced transmission efficiency.
Innovation Solution
A transmitter with a detection unit to identify arriving interference signals and a transmission timing control unit that delays packet transmission until a predetermined period after detection, allowing the receiver to prepare for and mitigate the interference, thereby reducing demodulation errors and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitter transmits packets immediately without detecting interference signals, then transmission efficiency is maintained, but demodulation errors increase due to interference signals arriving at random times
Solution Approach 1:
The transmitter performs preliminary detection of interference signals before transmitting packets. The detection unit scans for interference signals in the communication channel, and only when no interference is detected does the transmitter proceed with packet transmission. This preliminary action prevents demodulation errors by ensuring the channel is clear before transmission, while maintaining efficiency by avoiding unnecessary delays when the channel is already clear.
2Reliability
If the transmitter waits for a predetermined period after detecting interference before transmitting, then demodulation errors are suppressed, but transmission efficiency decreases due to delayed packet transmission
Solution Approach 1:
The transmitter performs preliminary detection of interference signals before transmitting packets. The detection unit scans for interference signals in the communication channel, and only when no interference is detected does the transmitter proceed with packet transmission. This preliminary action prevents demodulation errors by ensuring the channel is clear before transmission, while maintaining efficiency by avoiding unnecessary delays when the channel is already clear.
Solution Approach 2:
The transmission timing is dynamically adjusted based on interference detection results. When interference signals are detected, the transmitter waits for a predetermined period before transmitting; when no interference is detected, transmission proceeds immediately. This dynamic adjustment optimizes both reliability and efficiency by adapting transmission behavior to actual channel conditions rather than using fixed timing.
3Reliability
If continuous interference signal detection is performed, then demodulation errors are suppressed, but system complexity and energy consumption increase
Solution Approach 1:
The transmitter performs interference signal detection periodically at predetermined intervals rather than continuously. The detection unit is activated at specific timing points before packet transmission to check for interference signals. This periodic detection approach maintains demodulation accuracy by ensuring the channel is clear before transmission, while reducing system complexity and energy consumption by avoiding constant detection operations.
Data Source
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AI summary
At a time T131, a wireless communication apparatus 11A determines to transmit a data packet, and then performs interference signal detection for a period TA. At a time T132 preceding a time T133 at which the period TA has elapsed since the time T131, the wireless communication apparatus 11A detects a data packet d21 (an interference signal). At a time T134 at which a period TB has elapsed since the time T132 at which the interference signal has been detected, the wireless communication apparatus 11A starts transmitting a data packet d11 to a wireless communication apparatus 12A. At a time T136, the wireless communication apparatus 11A completes the transmission of the data packet d11.