Soft-Decision Decoder Without Hard-Decision Decoding
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Solution Overview
Problem
Traditional Soft Decision (SD) decoders for digital communications are complex due to their reliance on Hard Decision (HD) decoders, which increase system complexity and power consumption, especially in high-definition video transmission and video conferencing applications that require low packet error rates.
Innovation Solution
An improved SD decoder that eliminates the need for HD decoders by using a binary multiplier encoder and a novel decoding process that generates candidate codewords without HDD operations, reducing complexity and power consumption while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional SD decoders use HD decoders as part of their decoding process, then decoding performance is improved, but device complexity and power consumption increase significantly
Solution Approach 1:
The patent extracts and removes the HD decoder component from the traditional SD decoder architecture. By taking out the HD decoder that causes complexity and power consumption issues, the invention creates a simplified SD decoder that achieves comparable performance through alternative means (using only soft decision operations and candidate codeword generation) without relying on hard decision decoding components
Solution Approach 2:
The patent segments the decoding process into distinct stages: generating candidate codewords through bit flipping operations, encoding these candidates, and selecting the best match. This segmentation allows the system to replace the monolithic HD decoder with a modular approach that uses only soft decision operations, thereby reducing complexity while maintaining performance
2Reliability
If traditional SD decoders use HD decoders for decoding, then decoding capability is enhanced, but power consumption increases
Solution Approach 1:
The patent removes the power-consuming HD decoder component from the system. By extracting this high-power component and replacing it with soft decision operations and candidate generation mechanisms, the invention significantly reduces power consumption while preserving decoding capability through efficient soft decision processing
3Measurement precision
If HD decoders are used in the decoding process, then decoding accuracy is improved, but the number of required decoding operations increases
Solution Approach 1:
The patent applies partial action by generating a limited set of candidate codewords through selective bit flipping operations rather than performing exhaustive decoding. By flipping bits at specific positions (based on reliability metrics) to generate a manageable number of candidates, the system achieves sufficient decoding accuracy without the excessive complexity of complete HD decoding operations
Data Source
AI summary
There is provided an ultra-light decoder for high speed digital communications based on block codes such as turbo product codes (TPCs). The new decoder can perform soft decision decoding without an algebraic hard decision decoder, which is the core of conventional soft decision decoders. The elimination of algebraic decoder significantly reduces the number of computations required per codeword, consequently, it reduces the decoding delay and processing power. However, reducing the decoding delay would immediately enable increasing the transmission speed, and minimize the need for large buffers at the receiver. Moreover, reducing the complexity and delay would enable using codes with high code rates to increase the system capacity, or use powerful codes with low code rates to reduce the transmission power. Such benefits can be achieved for about 1 dB loss in coding gain. There is also provided a receiver comprising the ultra-light decoder, as well as a decoding process.