Transport Block Decoding Using Prior Header Information
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Solution Overview
Problem
Current decoding methods in wireless communications systems have a high error rate and low accuracy due to the reliance on demodulation soft values alone, without utilizing prior information from successfully decoded transport blocks.
Innovation Solution
A decoding method that uses a prior information estimation module to extract and utilize header information from successfully decoded transport blocks to improve decoding accuracy by incorporating this prior information when decoding subsequent transport blocks, especially when demodulation fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If decoding is performed based only on demodulation soft value, then the decoding process is simple, but the error rate is high and decoding accuracy is low
Solution Approach 1:
The patent applies preliminary action by extracting and storing header information from successfully decoded transport blocks before they are needed for decoding subsequent blocks. This pre-prepared prior information is then utilized during the decoding process to improve accuracy without adding complex real-time processing requirements.
Solution Approach 2:
The patent implements feedback by using header information from previously decoded transport blocks as prior information for decoding current transport blocks. This creates a feedback loop where successful decodings contribute to improving future decoding accuracy, particularly when demodulation fails.
2Reliability
If prior information from successfully decoded transport blocks is extracted and utilized, then decoding accuracy is improved, but the processing complexity increases
Solution Approach 1:
The patent applies the extraction principle by selectively extracting header information from successfully decoded transport blocks. This extracted prior information is then used to improve decoding reliability without requiring the entire transport block to be reprocessed, thus limiting the increase in processing complexity to only the essential header fields.
3Loss of information
If header information from multiple layers is combined and coded, then the transport block contains comprehensive information, but the decoding error rate remains high without utilizing prior information
Solution Approach 1:
The patent applies self-service by enabling the decoding system to utilize its own previously decoded header information as prior knowledge for current decoding tasks. This self-generated prior information complements the header information from multiple layers, reducing information loss and improving decoding accuracy without requiring external assistance.
Data Source
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AI summary
This disclosure provides a decoding method and apparatus, and belongs to the communications field. The method includes: extracting at least one piece of prior information from at least one first transport block that has been successfully decoded, and assembling the at least one piece of prior information into a prior information set, where one piece of prior information includes header information of a transmission protocol layer of one first transport block; when a to-be-decoded second transport block sent by a transmit end is received, selecting first prior information from the prior information set, where the second transport block is a transport block obtained by the transmit end by coding a third transport block; and decoding the second transport block based on the first prior information and first demodulation information of the second transport block, to obtain the third transport block. The apparatus includes a first extraction unit, a selection unit, and a first decoding unit. In this disclosure, the second transport block is decoded based on both the first prior information and the first demodulation information, so as to improve decoding accuracy.