Adaptive Interleaving Depth for Variable Packet Codewords
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Solution Overview
Problem
Existing digital communication systems face challenges in maintaining communication reliability due to nonideal channel environments and random noise, where error correcting codes and interleaving schemes struggle to effectively handle errors and optimize performance across varying packet sizes.
Innovation Solution
An adaptive interleaving method that determines the interleaving depth for each interleaving block based on the maximum interleaving depth, number of codewords, and communication channel environment, using modulo operations and dummy codewords to optimize interleaving, ensuring reliable communication regardless of packet size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed interleaving depth is used for all packet sizes, then the interleaving process is simple, but communication reliability deteriorates in nonideal channel environments with varying packet sizes
Solution Approach 1:
The patent applies dynamics by making the interleaving depth variable rather than fixed. The interleaving depth is dynamically adjusted based on the packet size and channel conditions, allowing the system to adapt to varying communication environments. This resolves the contradiction by enabling reliable communication across different packet sizes while maintaining reasonable processing complexity through systematic adjustment rules.
Solution Approach 2:
The patent changes the interleaving depth parameter according to packet size and channel conditions. By systematically varying this parameter, the system optimizes error correction performance for different communication scenarios without requiring complex adaptive algorithms, thus maintaining ease of implementation while improving reliability.
2Reliability
If the interleaving depth is increased to improve error correction, then communication reliability improves, but the processing complexity and time increase
Solution Approach 1:
The patent systematically adjusts the interleaving depth parameter based on packet size and channel conditions rather than using a fixed high value. This allows the system to achieve adequate error correction capability while avoiding excessive processing complexity by matching the interleaving depth to the actual communication requirements.
3Reliability
If the interleaving depth is increased to handle errors better, then error correction improves, but the processing time increases
Solution Approach 1:
The patent dynamically adjusts interleving depth based on actual communication needs rather than using a consistently high value. This allows the system to achieve necessary error correction performance while minimizing processing time by using the minimum adequate interleaving depth for each specific transmission scenario.
4Ease of manufacture
If a preset interleaving depth is used, then the implementation is simple, but adaptability to different channel environments and packet sizes is poor
Solution Approach 1:
The patent systematically changes the interleaving depth parameter based on packet size and channel conditions using defined adjustment rules. This provides adaptability to different communication scenarios while maintaining implementation simplicity through systematic rather than arbitrary parameter selection.
Data Source
AI summary
An interleaving method and apparatus for adaptively determining an interleaving depth of each of one or more interleaving blocks based on a maximum interleaving depth and a number of codewords of a packet, and interleaving the interleaving blocks based on the interleaving depth. The adaptively determining the interleaving depth includes: calculating a number of remaining codewords by performing a modulo operation on a basic interleaving depth and the number of the codewords; and determining the interleaving depth by adjusting the basic interleaving depth based on the number of the remaining codewords.