Low-Rate Wireless Coding for Long-Range Links Under Noise
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving extended long-range transmission while maintaining target throughput, particularly in environments with high noise and interference, where conventional coding methods struggle to provide sufficient coding gain.
Innovation Solution
Implementing low rate coding designs, such as lower rate LDPC and BCC codes, to enhance coding gain and extend transmission range without requiring extensive development of new encoders and decoders, leveraging existing hardware for compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional coding methods are used, then device complexity is reduced and ease of manufacture is improved, but transmission range is limited and coding gain is insufficient in high noise environments
Solution Approach 1:
The patent changes the coding rate parameter from conventional rates (1/2, 2/3, 3/4, 5/6) to lower rates (1/3, 1/4, 1/5, 1/6, 1/8, 1/12, 1/16) to achieve extended transmission range and improved coding gain in high noise environments, while maintaining compatibility with existing LDPC and BCC encoder/decoder hardware through parameter optimization rather than structural redesign
2Reliability
If lower coding rates are implemented, then coding gain is enhanced and transmission reliability is improved, but throughput decreases and data transmission efficiency is reduced
Solution Approach 1:
The patent implements dynamic selection of coding rates and code types (LDPC or BCC) based on channel conditions, allowing the system to adapt between lower coding rates for reliable long-range transmission and higher coding rates for shorter range high-throughput scenarios, thereby balancing reliability and productivity across different operating conditions
3Length of moving object
If new encoders and decoders are developed to achieve lower coding rates, then coding gain is improved and transmission range is extended, but development cost and device complexity increase
Solution Approach 1:
The patent designs a universal coding framework where existing LDPC and BCC encoder/decoder hardware can operate at multiple coding rates (1/2, 2/3, 3/4, 5/6, and extended lower rates 1/3, 1/4, 1/5, 1/6, 1/8, 1/12, 1/16) through parameter configuration, eliminating the need for separate dedicated hardware for each coding rate and enabling one system to serve multiple transmission range requirements
Data Source
AI summary
This disclosure provides methods, components, devices and systems for generating and processing codeword transmissions with reduced code rates. According to one aspect, a method for wireless communications at a first wireless node generally includes obtaining a set of data bits; encoding the data bits, based on at least a first nominal code rate, to generate one or more codewords associated with a reduced nominal code rate that is lower than the first nominal code rate; and outputting the one or more codewords.