Signal Processing Device Selective Time Interpolation Mobile Channels
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Solution Overview
Problem
Current signal processing devices face accuracy issues with time interpolation in mobile channels, leading to defects in broadcasting images due to rapid channel changes, which degrade channel estimation accuracy.
Innovation Solution
A signal processing device and image display apparatus that selectively perform time interpolation based on calculated channel transfer function values, using a synchronizer for Fourier transform and an equalizer to extract pilot signals, allowing for stable data transmission even in mobile channels by turning off time interpolation when channel conditions are unfavorable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time interpolation is performed in mobile channels, then signal processing can be completed, but time interpolation accuracy is remarkably lowered and channel estimation accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the time interpolation function configurable and adaptive. The system dynamically adjusts whether to perform time interpolation based on channel conditions (mobile vs. fixed channel). In mobile channels, time interpolation is disabled to avoid accuracy degradation, while in fixed channels, it remains enabled for improved signal processing. This dynamic adaptation resolves the contradiction between completing signal processing and maintaining interpolation accuracy.
Solution Approach 2:
The patent changes the parameter of time interpolation execution status from fixed to variable. By introducing a configuration option that allows the system to switch time interpolation on or off based on channel type, the patent optimizes performance for different scenarios. This parameter change enables the system to avoid time interpolation in mobile channels where it degrades accuracy, while still utilizing it in fixed channels where it improves processing.
2Productivity
If time interpolation is performed in mobile channels, then signal processing continues, but defects appear in broadcasting images
Solution Approach 1:
The patent implements dynamic control of time interpolation based on detected channel conditions. When a mobile channel is detected, the system dynamically disables time interpolation to prevent image defects, while maintaining signal processing continuity through alternative methods. This dynamic adjustment ensures reliability of broadcasting images without completely stopping signal processing operations.
3Device complexity
If time interpolation is always performed, then signal processing is simplified, but channel estimation accuracy is lowered in mobile channels
Solution Approach 1:
The patent introduces a configurable parameter that controls whether time interpolation is performed. This parameter is adjusted based on channel type detection, allowing the system to switch between different processing modes. The added complexity of this configuration mechanism is justified by the significant improvement in channel estimation accuracy in mobile channels, where disabling time interpolation prevents accuracy degradation.
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 improves channel estimation accuracy and ensures stable data transmission in mobile channels by selectively performing time interpolation, thereby preventing defects in broadcasting images.
Implementation Method 1
a synchronizer configured to perform a Fourier transform based on the received baseband signal
Data Source
AI summary
The present disclosure relates to a signal processing device and an image display apparatus including the same. The signal processing device includes a synchronizer configured to perform Fourier transform based on the received baseband signal, and an equalizer configured to extract a pilot signal from a signal from the synchronizer, to calculate a channel transfer function value of the extracted pilot signal, and to selectively perform time interpolation based on the calculated channel transfer function value. Thus, time interpolation is selectively performed based on the channel.