Satellite Receiver Error Correction with Code-Word Signal Alignment
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Solution Overview
Problem
Existing error correction units in DVB-S satellite digital broadcasting reception devices face challenges in achieving consistency between the likelihood signal for Viterbi decoding and the feedback signal obtained through interleave processing, leading to inaccuracies in error correction using repetition processing.
Innovation Solution
A reception device configuration that includes demodulation, decoding, and signal compensation units to align and compensate the main signal with the feedback signal in units of code-words, estimating and correcting phase shift and spectrum inversion to ensure accurate error correction processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetition processing is used to enhance error correction performance, then error correction capability is improved, but consistency between the likelihood signal and feedback signal deteriorates
Solution Approach 1:
The patent applies preliminary action by performing interleave processing on the main signal before Viterbi decoding, and by preparing the feedback signal through RS decoding and interleave processing in advance. This preliminary preparation ensures that both signals are in consistent formats before comparison, resolving the consistency issue while maintaining error correction capability through repetition processing
Solution Approach 2:
The patent introduces an interleave processing unit as an intermediary that standardizes both the main signal and feedback signal into consistent formats. This intermediary processing layer ensures that signals from different sources (direct demodulation vs. feedback from RS decoding) can be properly aligned and compared, enabling accurate repetition decoding while maintaining signal consistency
2Measurement precision
If feedback signal is used for repetition decoding, then error correction accuracy is improved, but signal alignment in units of code-words deteriorates
Solution Approach 1:
The patent implements feedback by using the RS decoding result as a feedback signal that is processed through interleave processing and then used to correct the main signal through Viterbi decoding. This feedback mechanism provides accurate error correction while the interleave processing ensures proper code-word alignment is maintained throughout the feedback loop
Solution Approach 2:
The patent applies parameter changes by transforming the feedback signal through interleave processing, which changes the signal's structural parameters to match the main signal's format. This parameter transformation preserves the error correction information while ensuring proper code-word position alignment between feedback and main signals
Data Source
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AI summary
The present technology relates to a reception device, a reception method on the reception device, and a program, capable of enhancing accuracy in error correction processing using repetition processing by achieving consistency between a main signal and a feedback signal in units of code-words. A Viterbi decoding unit decodes a demodulated signal. An observation unit observes a known signal included in a Viterbi-decoded signal and outputs compensation information for compensation of a phase shift and spectrum inversion. A first signal compensation unit compensates for the phase shift and spectrum inversion on the basis of the known signal included in the Viterbi-decoded signal, and an RS decoding unit performs RS decoding. A second signal compensation unit compensates for the phase shift and spectrum inversion of the demodulated signal in a pre-stage of performing Viterbi decoding on the basis of the compensation information from the observation unit. Subsequently, the Viterbi decoding unit performs Viterbi decoding on the demodulated signal using a signal for which RS decoding was successful. The present technology is applicable to the reception device of satellite broadcasting.