MIMO Multi-Band Coding for Higher Frequency Diversity
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Solution Overview
Problem
MIMO systems using multiple fundamental bands suffer from insufficient frequency diversity effects, limiting their ability to improve reception quality and efficiently utilize frequency channels.
Innovation Solution
A transmission and reception system that allocates error correction coded data across multiple fundamental bands, employing pre-coding and interleaving techniques to enhance frequency diversity, with phase change matrices and different interleaving patterns used to reduce correlation between frequency channels, thereby improving reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO transmission uses multiple fundamental bands, then data transmission capacity is improved, but frequency diversity effect is insufficient
Solution Approach 1:
The patent segments the transmitted data into multiple types (first type and second type) and allocates them to different fundamental bands through separate coding paths. This segmentation allows different data to experience different channel conditions, thereby achieving frequency diversity while maintaining high transmission capacity across multiple bands
Solution Approach 2:
The patent introduces a new dimension of data classification by type, in addition to the existing spatial and frequency dimensions. By coding first type data and second type data differently and transmitting them through multiple fundamental bands, the system creates a hierarchical structure that enhances frequency diversity without sacrificing transmission capacity
2Reliability
If error correction coding is performed for each data block, then error correction capability is improved, but transmission efficiency is reduced
Solution Approach 1:
The patent applies different error correction coding strategies to different types of data locally. First type data receives one coding treatment while second type data receives another, allowing each data type to be optimized for its specific requirements. This local differentiation improves overall error correction capability without uniformly reducing transmission efficiency across all data
3Reliability
If data components are allocated to multiple fundamental bands, then frequency diversity is enhanced, but system complexity is increased
Solution Approach 1:
The patent performs preliminary classification of data into first type and second type before transmission, and pre-establishes the coding and allocation rules for each type. This preliminary organization simplifies the overall system complexity by providing a clear framework for how data will be processed and distributed across fundamental bands, making the complexity manageable through structured planning
Data Source
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AI summary
A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.