Base Station Symbol Interleaving for Fading-Resistant Transmission
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Solution Overview
Problem
Existing communication technologies face challenges in suppressing error rate performance degradation due to fading, particularly in multi-antenna transmission systems, where high-speed data transmission is required with low computational complexity, and conventional bit interleaving methods are inadequate for mobile terminals.
Innovation Solution
A transmitting method and apparatus that employs a combination of encoding, interleaving, and modulation processing, where encoded data is convolutionally encoded with varying coding rates, and bits are arranged across multiple symbols to form one symbol, allowing for high-speed operation with reduced computational complexity through a simplified bit interleaving configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bit interleaving methods are used in multi-antenna transmission systems, then error correction capability is improved, but device complexity and computational complexity increase significantly
Solution Approach 1:
The patent segments the bit interleaving process into multiple independent encoding sections, each handling a portion of the encoded data. This segmentation reduces the computational burden on each section while maintaining the overall error correction capability through distributed processing across multiple sections.
Solution Approach 2:
The patent transitions from conventional bit-level interleaving to a symbol-level arrangement approach, changing the dimension of processing from individual bits to grouped symbols. This dimensional change simplifies the processing architecture while preserving error correction performance through the structured arrangement of encoded data across multiple symbols.
2Speed
If high-speed data transmission is implemented in mobile terminals, then transmission speed is improved, but error rate performance degradation due to fading increases
Solution Approach 1:
The patent applies preliminary encoding and structured arrangement to the transmitted data before transmission occurs. By pre-organizing the encoded data across multiple symbols in a specific pattern, the system prepares the data to be more resilient to fading effects, thereby maintaining error correction capability even during high-speed transmission in mobile environments.
3Productivity
If encoded data is concentrated in fewer symbols, then transmission efficiency is improved, but susceptibility to burst errors from fading increases
Solution Approach 1:
The patent segments the encoded data into multiple portions and distributes them across multiple symbols through structured arrangement. This segmentation prevents concentration of encoded data in fewer symbols, thereby reducing burst error susceptibility while maintaining transmission efficiency through organized distributed transmission.
Solution Approach 2:
The patent changes the arrangement parameter from concentrated data placement to distributed data placement across multiple symbols. By modifying how encoded data is positioned in the symbol sequence, the system achieves both transmission efficiency and reduced vulnerability to burst errors from fading channels.
Data Source
AI summary
A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.