PLS Decoding Circuit Using Parallel Bit-Combination Processing
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Solution Overview
Problem
In DVB-S2 and DVB-S2X systems, receivers face challenges in accurately decoding physical layer signaling (PLS) codes due to unknown 8-bit system information, leading to decoding errors, especially under poor signal quality, which degrades performance.
Innovation Solution
A decoding circuit with multiple processing circuits and a determination circuit processes encoded data to generate multiple processed signals corresponding to different bit combinations of system information, allowing for accurate determination of system information in a single decoding operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiver decodes the PLS code using traditional methods, then the decoding process can be completed, but the receiver encounters decoding errors due to unknown 8-bit system information, requiring repeated decoding operations
Solution Approach 1:
The patent segments the system information into two parts: the first 6 bits are decoded using traditional methods, while the last 2 bits are determined by comparing correlation values from multiple processing circuits. This segmentation allows the majority of the system information to be decoded accurately without requiring repeated operations, thus improving decoding accuracy while reducing the time loss from repeated attempts.
Solution Approach 2:
The patent performs preliminary processing by generating multiple processed signals corresponding to different bit combinations of the system information before final determination. The processing circuits pre-calculate correlation values for all possible bit combinations, and the determination circuit then selects the correct combination based on the maximum correlation value. This preliminary action eliminates the need for repeated decoding operations, significantly reducing decoding time while maintaining high accuracy.
2Measurement precision
If the receiver performs repeated decoding operations to obtain correct system information, then decoding accuracy can be improved, but the decoding time increases significantly
Solution Approach 1:
The patent performs preliminary processing by generating multiple processed signals corresponding to different bit combinations of the system information before final determination. The processing circuits pre-calculate correlation values for all possible bit combinations, and the determination circuit then selects the correct combination based on the maximum correlation value. This preliminary action eliminates the need for repeated decoding operations, significantly reducing decoding time while maintaining high accuracy.
Solution Approach 2:
The patent creates multiple copies of the processing circuit, each configured to process the encoded data according to different bit combinations of the system information. These parallel processing circuits simultaneously generate multiple processed signals, allowing the receiver to determine the correct system information in a single decoding operation rather than through repeated attempts, thus improving both accuracy and efficiency.
3Reliability
If the signal quality is poor, then the receiver may obtain correct system information after repeated decoding, but the probability of decoding errors increases and performance degrades
Solution Approach 1:
The patent creates multiple copies of the processing circuit, each configured to process the encoded data according to different bit combinations of the system information. These parallel processing circuits simultaneously generate multiple processed signals, allowing the receiver to determine the correct system information in a single decoding operation rather than through repeated attempts, thus improving both accuracy and efficiency.
Solution Approach 2:
The patent implements a feedback mechanism where the determination circuit compares the processed signals from multiple processing circuits and selects the bit combination that produces the maximum correlation value. This feedback-based selection ensures that even under poor signal conditions, the receiver can identify the correct system information by choosing the most likely bit combination, thereby maintaining reliability despite signal quality degradation.
4Device complexity
If the receiver uses a single processing circuit for decoding, then the device complexity is low, but the decoding accuracy decreases under poor signal conditions
Solution Approach 1:
The patent creates multiple copies of the processing circuit, each configured to process the encoded data according to different bit combinations of the system information. These parallel processing circuits simultaneously generate multiple processed signals, allowing the receiver to determine the correct system information in a single decoding operation rather than through repeated attempts, thus improving both accuracy and efficiency.
Data Source
AI summary
A decoding circuit applied to a multimedia apparatus is provided. The decoding circuit is for decoding encoded data to generate system information, and includes multiple processing circuits and a determination circuit. The multiple processing circuits individually process the encoded data to generate multiple processed signals, and respectively correspond to multiple bit combinations of a part of the system information. The determination circuit determines the system information according to the multiple processed signals.