Mobile Code Decoding Using CRC-Guided Erasure Identification
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Solution Overview
Problem
Conventional decoding processes for Reed-Solomon (RS) codes in mobile communication systems consume high power and have complex structures due to the need for both inner and outer decoding operations, especially when searching for error symbols and erasure symbols.
Innovation Solution
A method and apparatus that simplify the decoding process by using only the cyclic redundancy checking (CRC) result to identify erasure symbols and omit unnecessary inner and outer decoding operations, reducing power consumption and maintaining error correction capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inner and outer decoding operations are performed to correct error symbols, then error correction capability is improved, but power consumption increases and device complexity increases
Solution Approach 1:
The patent extracts and focuses only on the essential error correction function by using CRC results to identify erasure symbols, omitting unnecessary inner decoding operations. This selective approach maintains error correction capability while reducing power consumption by eliminating redundant decoding steps.
Solution Approach 2:
Instead of performing complete inner and outer decoding operations, the patent applies partial action by using only the necessary outer decoding with CRC-based erasure symbol identification. This partial approach is sufficient to maintain reliability while significantly reducing power consumption.
2Reliability
If conventional inner and outer decoding operations are performed to correct error symbols, then error correction capability is improved, but device complexity increases
Solution Approach 1:
The patent removes unnecessary inner decoding components from the receiver structure by relying on CRC-based erasure symbol identification combined with outer decoding. This extraction of essential functions simplifies the overall decoder architecture while maintaining error correction capability.
Solution Approach 2:
The patent implements a simplified decoder structure that performs only the necessary outer decoding operations with CRC guidance, omitting excessive inner decoding complexity. This partial action approach achieves the required reliability with a less complex device structure.
3Measurement precision
If complete inner and outer decoding operations are performed, then decoding accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary action by using CRC results to pre-identify erasure symbols before the main outer decoding process. This preliminary identification streamlines the subsequent decoding operations, maintaining decoding accuracy while reducing overall processing time by avoiding unnecessary computational steps.
Data Source
AI summary
A method and apparatus for decoding inner and/or outer codes in a mobile communication system. The inner and/or outer codes are decoded at low power and high speed. An inner decoder performs channel decoding and cyclic redundancy checking (CRC) on symbols received through a wireless network. An outer decoder performs outer coding on the received symbols. An erasure symbol identifier outputs information of erasure symbols in which a reception error has occurred. The reception error is determined from a result of the CRC on the received symbols. A controller counts the number of received symbols and the number of erasure symbols, and stops an operation of at least one of the inner and outer decoders when at least one of the number of received symbols and the number of erasure symbols is equal to a preset reference value.