Signal Processing Device Using 3D Mean Square Error for Co-Channel Interference
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Solution Overview
Problem
Existing signal processing devices face inaccuracies in calculating mean square errors, leading to inefficient error correction in communication channels, particularly in digital broadcast signals, resulting in defects in broadcast images.
Innovation Solution
A signal processing device that includes a synchronizer, channel estimator, equalizer, error corrector, and mean square error calculator, which calculates and uses mean square errors in the time, frequency, and spatial domains to perform error correction, especially when co-channel interference or burst noise is present, to produce a defect-free baseband signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mean square error calculation is performed using conventional methods in digital broadcast signals, then error correction can be performed, but the calculation accuracy deteriorates under certain communication channel conditions, causing image defects
Solution Approach 1:
The patent extends the mean square error calculation from conventional two-dimensional (time and frequency domains) to three-dimensional by incorporating the spatial domain. This dimensional expansion allows the system to capture interference patterns more accurately, particularly co-channel interference, thereby improving calculation accuracy without compromising error correction reliability across various channel conditions
2Productivity
If error correction is performed using conventional mean square error calculation, then signal processing can proceed, but defects occur in broadcast images when co-channel interference is present
Solution Approach 1:
The patent transforms the harmful effect of co-channel interference into a useful signal characteristic by calculating mean square errors in the spatial domain. The interference pattern, which was previously causing image defects, becomes a measurable parameter that helps identify and correct errors more accurately, thereby eliminating the harmful effects while maintaining processing efficiency
3Device complexity
If mean square error is calculated only in time and frequency domains, then calculation complexity is kept manageable, but accuracy deteriorates when burst noise or co-channel interference is present
Solution Approach 1:
The patent segments the mean square error calculation into three independent domain calculations (time, frequency, and spatial domains) that can be performed separately and then combined. This segmentation approach manages computational complexity by breaking down the three-dimensional calculation into manageable components while achieving superior accuracy through the integration of all three domain analyses
Data Source
AI summary
The present invention relates to a signal processing apparatus and an image display apparatus including the same. The signal processing apparatus for processing a baseband signal demodulated from an RF signal, includes: a synchronizer; a channel estimator; an equalizer; an error corrector to perform error correction based on a signal output from the equalizer; and a mean square error calculator to calculate a mean square error based on a difference between an input signal from the equalizer and a reference signal, wherein when the RF signal includes a co-channel interference signal, the error corrector performs error correction by using a mean square error in a time domain or mean square errors in a time domain and a spatial domain. Accordingly, a baseband signal, from which a defect is removed, may be obtained in response to various communication channels or broadcast channels.