Compressed FEC Coding for Higher Information Rate Transmission
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Solution Overview
Problem
Existing Forward Error Correction (FEC) techniques in communications require significant redundancy to achieve low Bit Error Rates (BER), which reduces the information rate and increases hardware complexity and heat generation, especially in high-speed optical communications.
Innovation Solution
The proposed FEC with compression coding reduces redundancy by calculating determiners and compressing them into a 'nub' that is transmitted separately from the information bits, allowing for higher information rates while maintaining low BER tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stronger FEC schemes are used to provide better error protection, then the BER is reduced, but the information rate decreases and hardware complexity increases
Solution Approach 1:
The patent segments the redundancy into two distinct components: determiners (syndromes) and nubs (compressed redundancy). This segmentation allows the determiners to be calculated from information bits and then compressed into a compact nub representation, reducing the overall redundancy overhead while maintaining error correction capability
Solution Approach 2:
The patent extracts only the essential redundancy information needed for error correction by compressing determiners into nubs. This extraction process removes unnecessary redundant bits while preserving the core error detection and correction functionality, thereby improving information rate without sacrificing reliability
2Reliability
If stronger FEC schemes are used to provide better error protection, then the BER is reduced, but hardware complexity and heat generation increase
Solution Approach 1:
The patent extracts and transmits only the compressed nub representation of redundancy rather than full syndromes. This extraction of essential error correction information reduces the amount of data that needs to be processed by hardware, thereby reducing hardware complexity and associated heat generation
Solution Approach 2:
Instead of transmitting full syndromes and having the receiver process them directly, the patent inverts the approach by compressing syndromes into nubs at the transmitter and using these compact nubs for error correction at the receiver, simplifying the hardware implementation
3Reliability
If more redundancy is added to achieve lower BER, then error correction capability is improved, but the information rate decreases
Solution Approach 1:
The patent changes the parameter of redundancy representation from full syndromes to compressed nub forms. This parameter change in how redundancy is encoded and transmitted reduces the overhead proportion, allowing more information bits to be transmitted relative to redundancy bits, thereby improving information rate while maintaining error correction capability
Data Source
AI summary
Compression coding techniques are proposed for use with forward error correction (FEC) coding, which may provide higher information rates by reducing the proportion of redundant bits relative to information bits that are transmitted from a transmitter to a receiver. In one example, the transmitter calculates a plurality of determiners from a set of information bits, where each determiner is calculated as a first function of a respective first subset of the information bits. The transmitter then calculates a nub as a second function of the plurality of determiners, where the nub comprises a number of redundant bits that is less than a number of bits comprised in the plurality of determiners. The set of information bits is transmitted to the receiver in a first manner, and the nub is transmitted to the receiver in a second manner, where the first manner may be distinct from the second manner.