Multi-Band MIMO Coding for Frequency Diversity in Reception
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Solution Overview
Problem
MIMO technology faces challenges in achieving sufficient frequency diversity across multiple fundamental bands, limiting the improvement of reception quality in MIMO systems.
Innovation Solution
A transmitter design that performs MIMO transmission using multiple fundamental bands, incorporating an error correction coding unit, a mapping unit, and a MIMO coding unit to allocate data components across at least two fundamental bands, and employs pre-coding and phase change matrices to enhance frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO transmission is performed using multiple fundamental bands, then frequency diversity is improved and reception quality is enhanced, but system complexity increases due to the need for pre-coding and phase change matrices
Solution Approach 1:
The patent applies pre-coding to data blocks before MIMO transmission, preparing the data in advance to achieve frequency diversity across multiple fundamental bands. This preliminary processing enhances reception quality by pre-distributing data components across different frequency bands, resolving the contradiction between improved reliability and system complexity through advance preparation rather than real-time complex processing
Solution Approach 2:
The patent employs phase change matrices that modify the phase parameters of transmitted signals across different fundamental bands. By changing phase parameters dynamically, the system achieves frequency diversity and improved reception quality without requiring fundamentally different transmission architecture, thus managing the trade-off between reliability improvement and system complexity
2Reliability
If error correction coding is applied to each data block, then transmission reliability is improved, but processing time and complexity increase
Solution Approach 1:
The patent divides data into blocks and applies error correction coding to each block independently. This segmentation allows parallel processing of multiple blocks, reducing overall processing time while maintaining high transmission reliability through systematic error correction across all blocks. The modular approach resolves the contradiction by enabling concurrent processing rather than sequential handling
Solution Approach 2:
Error correction codes are applied to data blocks before MIMO transmission and frequency band allocation. This preliminary error correction preparation ensures that even if transmission errors occur, the data can be reliably recovered, reducing retransmission needs and overall processing time while maintaining high transmission reliability
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.