MIMO Transmission Method Adaptation for Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional communication systems using multiple antennas suffer from low data transmission efficiency due to the transmission of duplicate information and poor reception quality when using space-time block codes, which results in inefficient data transmission.
Innovation Solution
A communication method and system that dynamically switch between two transmission methods and modulation schemes based on channel fluctuations, using either space-time block codes for high error resistance or different data transmission for higher rates, optimizing both reception quality and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If space-time block codes are used to transmit signals from multiple antennas, then reception quality is improved, but data transmission efficiency deteriorates due to duplicate information transmission
Solution Approach 1:
The patent applies dynamics by switching between two transmission methods based on channel conditions. When channel fluctuations are small, space-time block codes are used for high reliability. When channel fluctuations are large, different data is transmitted from multiple antennas for higher efficiency. This dynamic adaptation resolves the contradiction between reception quality and data transmission efficiency.
Solution Approach 2:
The patent changes the transmission parameter (whether to use space-time block codes or transmit different data) based on channel fluctuation conditions. By monitoring channel conditions and adjusting the transmission method accordingly, the system optimizes both reception quality and data transmission efficiency under different operational scenarios.
2Reliability
If the same data is transmitted from multiple antennas using space-time block codes, then error resistance is improved, but information redundancy increases
Solution Approach 1:
The system dynamically adjusts whether to transmit the same data (for error resistance) or different data (to reduce redundancy) based on channel conditions. When channel fluctuations are large, transmitting different data reduces information redundancy while maintaining acceptable error resistance through diversity gain.
Solution Approach 2:
The transmission method changes parameters based on channel fluctuation magnitude. When fluctuations are small, space-time block codes provide error resistance with manageable redundancy. When fluctuations are large, the system switches to transmitting different data, changing the redundancy parameter to optimize information efficiency.
3Adaptability or versatility
If transmission method is frequently changed during communication, then adaptability to channel conditions is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic adaptation by switching between transmission methods based on channel conditions, improving adaptability. However, it controls complexity by establishing specific switching criteria based on channel fluctuation thresholds, avoiding excessive switching and maintaining manageable system complexity.
Solution Approach 2:
The system changes transmission parameters adaptively based on channel conditions but uses clear threshold-based decision rules to limit the complexity of the switching logic. This approach provides good adaptability while keeping the control mechanism relatively simple and manageable.
Data Source
AI summary
Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 201 does not change the transmission method during data transmission and changes only the modulation scheme. Base station apparatus 201 transmits modulated signal A and modulated signal B to communication terminal apparatus 251 using the determined transmission method and modulation scheme. In this way, it is possible to improve data transmission efficiency when transmitting data using the plurality of antennas.