Polar Code Decoding with Syndrome-Guided Node Skipping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polar code decoding methods, particularly for variable-rate polar codes, face challenges in achieving high-speed decoding efficiency, especially when applied to algebraic code-based polar codes where the positions of frozen or information bits are not fixed, leading to increased complexity and latency.
Innovation Solution
A high-speed decoding method is proposed that utilizes syndrome verification to skip decoding of child nodes when the syndrome of the parent node satisfies a predetermined condition, reducing computational complexity by recursively performing syndrome calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polar code decoding methods are used for variable-rate polar codes, then decoding accuracy is maintained, but decoding complexity and latency increase
Solution Approach 1:
The decoding process is segmented into two distinct phases: syndrome checking phase and decoding phase. The syndrome checking phase first verifies whether the received codeword satisfies the syndrome condition without full decoding. Only if the syndrome check fails does the system proceed to the full decoding phase, thereby segmenting the workload and avoiding unnecessary complex decoding operations.
Solution Approach 2:
The syndrome check is performed as a preliminary action before full decoding. This preliminary verification step quickly identifies valid codewords that don't require full decoding, filtering out only those cases that need the complete decoding process, thus reducing overall complexity while maintaining accuracy.
2Reliability
If conventional polar code decoding methods are used for variable-rate polar codes, then decoding accuracy is maintained, but decoding latency increases
Solution Approach 1:
The decoding process is segmented into two distinct phases: syndrome checking phase and decoding phase. The syndrome checking phase first verifies whether the received codeword satisfies the syndrome condition without full decoding. Only if the syndrome check fails does the system proceed to the full decoding phase, thereby segmenting the workload and avoiding unnecessary complex decoding operations.
Solution Approach 2:
The syndrome check is performed as a preliminary action before full decoding. This preliminary verification step quickly identifies valid codewords that don't require full decoding, filtering out only those cases that need the complete decoding process, thus reducing overall complexity while maintaining accuracy.
3Adaptability or versatility
If algebraic code-based polar codes are used, then code flexibility is improved, but decoding complexity increases due to non-fixed frozen bit positions
Solution Approach 1:
The syndrome check is performed as a preliminary action before full decoding. This preliminary verification step quickly identifies valid codewords that don't require full decoding, filtering out only those cases that need the complete decoding process, thus reducing overall complexity while maintaining accuracy.
Solution Approach 2:
The syndrome check acts as an intermediary mechanism between the received signal and the full decoding process. It provides a quick validation layer that handles the flexibility of algebraic codes without requiring the full decoding complexity, mediating between the variable code structure and the decoding operation.
Data Source
AI summary
The present method relates to a method by which a device receives a signal in a communication system, and an apparatus therefor, and to a method by which a reception device processes a signal in a communication system, and an apparatus therefor, the method comprising the steps of: receiving an encoded bit sequence; and decoding the encoded bit sequence in the direction from a root node to the lowest node on the basis of a binary tree structure, wherein, in the decoding step, decoding for a child node is skipped on the basis that a syndrome of a parent node satisfies a predetermined condition, and decoding for the child node is performed on the basis that the syndrome of the parent node does not satisfy the predetermined condition.