Transmission Apparatus Standby Time Compensation for Inter-Symbol Interference
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Solution Overview
Problem
Existing radio communication systems fail to compensate for transmission time fluctuations of radio wave signals due to changes in the environment of the radio wave propagation path, leading to inter-symbol interference.
Innovation Solution
A transmission apparatus with a correction value calculation unit and a transmission time fluctuation compensation unit that adjusts the standby time of direct and indirect wave signals based on their intensities, using calculated correction values to mitigate the effects of multipath fading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inter-carrier interference removal apparatus is used to prevent inter-symbol interference, then inter-symbol interference is prevented, but transmission time fluctuation cannot be compensated
Solution Approach 1:
The transmission time fluctuation compensation apparatus integrates multiple functions into a single system: it performs both inter-symbol interference prevention and transmission time fluctuation compensation. The apparatus calculates correction values for both direct waves and indirect waves, and applies appropriate standby time corrections based on the dominant wave type, thereby achieving universal functionality that addresses both technical challenges simultaneously.
Solution Approach 2:
The apparatus dynamically adjusts the standby time correction based on real-time signal conditions. By determining whether direct waves or indirect waves are dominant and calculating different correction values accordingly, the system adapts its behavior to changing transmission conditions, enabling it to handle both inter-symbol interference and transmission time fluctuation effectively under varying environmental conditions.
2Device complexity
If a fixed standby time is used for direct wave signals, then simple processing is achieved, but transmission time fluctuation due to environmental changes cannot be compensated
Solution Approach 1:
The apparatus changes the standby time parameter dynamically based on transmission conditions. Instead of using a fixed standby time, the system calculates correction values that adjust the standby time for direct waves and indirect waves according to the actual transmission environment. This parameter adaptation enables the system to maintain processing simplicity while achieving accurate transmission time compensation under varying conditions.
3Reliability
If standby time is increased to accommodate indirect waves, then indirect wave reception is improved, but direct wave transmission efficiency decreases
Solution Approach 1:
The apparatus applies different standby time corrections to different wave types based on their specific characteristics. Direct waves receive one type of correction while indirect waves receive a different correction, allowing each wave type to be optimized independently. This localized quality adjustment ensures that indirect wave reception is improved without unnecessarily degrading direct wave transmission efficiency, as each wave type is handled according to its specific needs.
Data Source
AI summary
A transmission apparatus (10) according to the present disclosure incudes: a correction value calculation unit (130) configured to calculate a correction value for correcting an initial standby time of a direct wave signal or an indirect wave signal based on a reception time of the direct wave signal and a reception time of the indirect wave signal that follows the direct wave signal, and a transmission time fluctuation compensation unit (140) configured to calculate the standby time by correcting the initial standby time using the correction value and cause the direct wave signal or the indirect wave signal to stand by in accordance with the standby time. The correction value calculation unit (130) calculates a correction value for increasing the standby time of the direct wave signal or reducing the standby time of the indirect wave signal.