Multi-Band MIMO Transmission with Coded Data Allocation
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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 in diverse channel conditions.
Innovation Solution
A transmitter design that performs MIMO transmission by allocating components of error correction coded data across multiple fundamental bands, utilizing pre-coding and phase change matrices to enhance frequency diversity, and interleaving data across multiple frequency channels to reduce correlation between channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If MIMO transmission is performed using multiple fundamental bands, then transmission capacity is increased, but frequency diversity effect is insufficient
Solution Approach 1:
The error correction coded block is divided into multiple segments that are allocated to different fundamental bands. This segmentation allows the system to transmit data across multiple frequency channels while maintaining the ability to exploit frequency diversity, as each segment can be received through different propagation paths and frequency characteristics.
Solution Approach 2:
The patent extends the MIMO transmission from a single fundamental band to multiple fundamental bands, adding a frequency dimension to the spatial multiplexing. This dimensional expansion enables the system to achieve both high transmission capacity (through parallel bands) and frequency diversity (through distributed allocation across bands), resolving the contradiction between quantity and reliability.
2Area of stationary object
If data is allocated to multiple fundamental bands, then transmission bandwidth is increased, but reception quality in diverse channel conditions deteriorates
Solution Approach 1:
Different segments of the error correction coded block are strategically allocated to different fundamental bands based on their local frequency characteristics and channel conditions. This local optimization allows the system to exploit favorable frequency regions while mitigating the impact of poor channel conditions in other regions, thereby maintaining high reception quality across diverse channel environments.
3Productivity
If MIMO coding is performed across multiple fundamental bands, then data rate is increased, but error correction performance is insufficient
Solution Approach 1:
Error correction coding is performed on the entire data block before it is segmented and allocated to multiple fundamental bands. This preliminary error correction preparation ensures that the error correction capability is established at the source, allowing the system to maintain robust error correction performance even as data rate increases through multi-band transmission. The error correction codes can then operate effectively on the combined signals from all bands.
Data Source
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.