Multi-Band MIMO Signal Allocation for Better Frequency Diversity
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Solution Overview
Problem
MIMO technology faces challenges in improving reception quality, particularly due to insufficient frequency diversity effects when using multiple fundamental bands.
Innovation Solution
A transmitter that performs MIMO transmission using multiple fundamental bands, incorporating an error correction coding unit, mapping unit, and MIMO coding unit to allocate data components across at least two bands, enhancing frequency diversity through pre-coding and phase change matrices to improve reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO transmission is performed using multiple fundamental bands, then data transmission capacity is improved, but reception quality deteriorates due to insufficient frequency diversity effects
Solution Approach 1:
The patent applies preliminary action by performing pre-coding processing on the data before MIMO transmission. The pre-coding unit processes the data in advance to create a coded signal that inherently contains frequency diversity characteristics, which are then further enhanced during the MIMO transmission process. This preliminary processing ensures that the data is optimally prepared to withstand channel variations across multiple fundamental bands.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the phase of signals across different fundamental bands. The phase change processing unit modifies the phase parameters of the coded data to maximize frequency diversity effects. By changing phase parameters adaptively, the system improves reception quality while maintaining the benefits of multi-band transmission.
2Reliability
If data is allocated across at least two fundamental bands, then frequency diversity is enhanced, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the data transmission process into distinct functional units: a pre-coding unit that processes data independently, a phase change processing unit that handles phase adjustments, and a MIMO transmission unit that executes the actual transmission. This segmentation allows each unit to be optimized independently, reducing overall system complexity while achieving frequency diversity across multiple fundamental bands.
Solution Approach 2:
The patent implements multi-functionality by designing the pre-coding unit to perform multiple functions: it prepares data for MIMO transmission, embeds frequency diversity characteristics, and interfaces with the phase change processing unit. This universal unit handles various processing tasks within a single module, reducing the need for separate dedicated components and thereby lowering system complexity.
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.