Transmission Device Frame Configuration for MIMO Signal Detection
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Solution Overview
Problem
Conventional spatial multiplexing MIMO systems experience reception quality degradation in Line-Of-Sight (LOS) environments, particularly in broadcast or multicast communications, where the high electric field strength leads to service reception impossibility due to signal degradation.
Innovation Solution
A MIMO system that improves reception quality in LOS environments by employing a transmission method involving a fixed precoding matrix and regular phase changes over time, combined with iterative decoding and channel estimation, to enhance signal detection and decoding in the reception device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial multiplexing MIMO transmission is used to increase transmission speed, then data transmission capacity is improved, but reception quality degrades in LOS environments where direct waves dominate
Solution Approach 1:
The patent applies dynamics by switching between SISO and MISO/MIMO transmission modes based on detected propagation conditions. The transmission device dynamically adapts the transmission scheme according to signal characteristics, transitioning from static MIMO to dynamic mode selection that responds to real-time channel conditions, thereby maintaining reception quality while preserving high transmission capacity when conditions permit.
Solution Approach 2:
The patent changes the transmission parameter (mode selection between SISO and MISO/MIMO) based on propagation conditions. By monitoring signal characteristics and adjusting the transmission mode accordingly, the system optimizes the balance between transmission capacity and reception quality, resolving the contradiction between productivity and reliability.
2Productivity
If MIMO transmission is used to achieve high transmission speed, then data transmission capacity is improved, but service reception becomes impossible in broadcast/multicast communications due to signal degradation
Solution Approach 1:
The system dynamically switches transmission modes based on detected propagation conditions. In broadcast/multicast scenarios where direct waves cause degradation, the system transitions to SISO mode, ensuring service reception continuity while maintaining the ability to achieve high transmission capacity when channel conditions are favorable.
Solution Approach 2:
The transmission device uses feedback from signal characteristics to adjust transmission mode selection. By continuously monitoring channel conditions and responding accordingly, the system ensures service reception in broadcast/multicast communications while preserving high data transmission capacity when conditions allow.
3Reliability
If fixed precoding matrix with regular phase changes is applied to stabilize signal detection, then reception quality in LOS environments is improved, but transmission adaptability is reduced
Solution Approach 1:
The system uses dynamic mode selection between SISO and MISO/MIMO transmission schemes based on propagation conditions. The fixed precoding with phase changes is applied selectively only when needed (in LOS environments), while the system can switch to adaptive MIMO modes when channel conditions permit, thus balancing signal detection stability with transmission adaptability.
Data Source
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AI summary
Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device.