LDPC Channel Encoding with Quasi-Cyclic Shifts for 5G Reliability
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Solution Overview
Problem
In 5G communication systems, high-speed digital communication and broadcast systems face challenges due to channel noises, fading, and inter-symbol interferences, which degrade link performance and require advanced error-correcting codes for high throughput and reliability.
Innovation Solution
A method and apparatus for channel encoding and decoding using quasi-cyclic shifts and cyclic shifts in codewords, specifically employing LDPC codes with quasi-cyclic parity check matrices, to enhance data transmission and reception by aligning and shifting codewords based on determined values, allowing for efficient error detection and correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If advanced error-correcting codes are used to overcome channel noises and fading, then reliability is improved, but device complexity increases
Solution Approach 1:
The channel code is divided into multiple blocks, where each block can be independently encoded and decoded. This segmentation allows the receiver to process blocks separately, reducing the complexity of error correction while maintaining high reliability through parallel processing of multiple code blocks
Solution Approach 2:
The patent employs quasi-cyclic shift operations that transform the code parameters (shift values) to adapt to different channel conditions. By changing the shift parameters rather than the fundamental code structure, the system maintains reliability while managing complexity through parameter adjustment rather than structural complexity
2Productivity
If higher frequency bands are used to accomplish higher data rates, then productivity is improved, but loss of energy increases due to propagation loss
Solution Approach 1:
The system uses feedback mechanisms where the receiver detects errors in received blocks and requests retransmission of specific failed blocks. This feedback loop allows the system to operate at high data rates by efficiently correcting errors that occur due to propagation loss, thereby maintaining effective throughput without wasting energy on permanently lost data
3Reliability
If beamforming and massive MIMO techniques are used to decrease propagation loss, then reliability is improved, but device complexity increases
Solution Approach 1:
The transmission data is divided into multiple code blocks that can be independently processed and transmitted through different antenna resources. This segmentation allows massive MIMO systems to distribute the complexity across multiple antenna elements while maintaining overall transmission reliability through diverse spatial paths
Data Source
AI summary
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transfer rate beyond a 4G communication system, such as LTE. One embodiment of the present invention provides a method for channel encoding in a communication system, the method comprising: encoding second data, using an outer channel code; determining a value corresponding to first data, arranging the encoded second data in a block size unit corresponding to the second data, based on the determined value; and encoding the arranged second data, using an inner channel code.