Multi-Band MIMO Frame Allocation for Frequency-Diverse Reception
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Solution Overview
Problem
MIMO systems using multiple fundamental bands experience insufficient frequency diversity, limiting the improvement of reception quality in MIMO transmission.
Innovation Solution
A transmitter that performs MIMO transmission by error correction coding, mapping, and MIMO coding across multiple fundamental bands, allocating data components across at least two bands to enhance frequency diversity and reception quality.
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 is insufficient leading to degraded reception quality
Solution Approach 1:
The transmission system segments data into multiple code blocks and distributes them across different fundamental bands through MIMO coding. Each code block is independently encoded and mapped to specific subcarriers in different bands, ensuring that data is spread across multiple frequency resources. This segmentation approach enables both high transmission capacity and frequency diversity, as failure in one band does not result in complete data loss.
Solution Approach 2:
The patent introduces frequency domain diversity by allocating code blocks to multiple fundamental bands (different frequency dimensions). Instead of confining transmission to a single band, the system utilizes multiple bands as additional dimensions for data distribution. This dimensional expansion provides frequency diversity while maintaining high transmission capacity, as data can be recovered from any available band.
2Device complexity
If data is concentrated in a single fundamental band, then transmission simplicity is maintained, but frequency diversity is insufficient
Solution Approach 1:
The MIMO coding structure provides universal functionality by handling both single-band and multi-band transmissions through a unified framework. The same coding and mapping procedures can be applied regardless of the number of fundamental bands used, making the system adaptable and multi-functional. This universality maintains transmission simplicity while enabling frequency diversity when multiple bands are employed.
Solution Approach 2:
The system transitions from single-band to multi-band transmission by adding the frequency band dimension to the existing MIMO framework. This dimensional extension allows the system to maintain its inherent simplicity while gaining frequency diversity benefits, as the additional band dimension provides redundancy without fundamentally changing the core transmission mechanism.
3Reliability
If error correction coding is applied to each data block, then error resilience is improved, but processing complexity increases
Solution Approach 1:
The patent segments the overall data stream into multiple code blocks, each of which is independently error correction coded. This segmentation allows error correction to be applied at a manageable block level rather than to the entire data stream, reducing processing complexity while maintaining error resilience. If errors occur in one code block, only that block needs retransmission or correction, not the entire transmission.
Solution Approach 2:
The system applies error correction coding selectively to individual code blocks rather than attempting to protect the entire transmission as a single unit. This partial action approach reduces the computational burden of error correction while providing sufficient protection for each segment. The independent coding of each block enables parallel processing, further reducing overall processing complexity.
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.