Multi-Band MIMO Coding with Interleaving for 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 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 interleaving techniques to enhance frequency diversity, including the use of phase change matrices and different interleaving patterns to reduce correlation between frequency 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, thereby improving frequency diversity while maintaining the increased transmission capacity provided by multiple fundamental bands.
Solution Approach 2:
The patent introduces a new dimension of frequency diversity by allocating code components across multiple fundamental bands rather than within a single band. This dimensional expansion from single-band to multi-band transmission enables the system to achieve both high capacity and improved frequency diversity.
2Reliability
If data components are allocated to multiple fundamental bands, then frequency diversity is improved, but system complexity increases
Solution Approach 1:
The patent applies pre-coding techniques before allocating data to multiple fundamental bands. This preliminary processing step organizes the data in a manner that facilitates efficient multi-band allocation, reducing the complexity of the subsequent allocation and transmission processes while achieving improved frequency diversity.
Solution Approach 2:
The system utilizes different interleaving patterns for different fundamental bands, changing the parameter of data arrangement to optimize frequency diversity. This parameter variation allows the system to achieve better performance without requiring fundamentally different system architectures, thereby managing complexity.
3Reliability
If pre-coding and interleaving techniques are applied, then error correction performance is improved, but processing complexity increases
Solution Approach 1:
The patent applies different interleaving patterns to different segments of the error correction coded block, with each segment experiencing locally optimized processing tailored to its specific allocation. This local quality approach improves error correction performance by adapting to local channel conditions while avoiding the need for uniformly complex processing across the entire system.
Solution Approach 2:
Pre-coding is applied as a preliminary step before data allocation to multiple fundamental bands. This preliminary action prepares the data in advance, organizing it in a way that simplifies subsequent processing steps and enables efficient error correction across the multi-band transmission system.
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.