Space-Time Coded Massive MIMO Interference Management
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Solution Overview
Problem
Current wireless communication technologies, including space-time coded systems and massive MIMO, face challenges in accommodating growing user density and interference in densely populated areas, where they struggle to maintain signal reliability and efficiency.
Innovation Solution
The integration of space-time coded massive MIMO (STCM)-MIMO systems, which combine the diversity features of space-time codes with the interference cancellation capabilities of massive MIMO, using multiple arrays of transmit antennas to treat channels as orthogonal, thereby eliminating interference and enhancing signal clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If space-time coded systems are used to enhance reliability and capacity, then diversity gain and signal clarity are improved, but the systems fail to efficiently accommodate growing user density in multi-user environments
Solution Approach 1:
The patent combines space-time coded MIMO with massive MIMO technologies to create a hybrid system that achieves both diversity gain from space-time coding and interference cancellation from massive MIMO, thereby simultaneously improving signal reliability and accommodating growing user density
Solution Approach 2:
The integrated system performs multiple functions: it provides diversity gain through space-time codes, cancels interference through massive MIMO techniques, and accommodates multi-user environments, making the system universally applicable to various wireless communication scenarios
2Object-generated harmful factors
If massive MIMO with linear pre-coding is used to eliminate interfering signals, then interference cancellation and bandwidth efficiency are improved, but the systems struggle to maintain performance in densely populated areas with high user density
Solution Approach 1:
The patent merges massive MIMO with space-time coded MIMO to create a system that not only cancels interference through linear pre-coding but also maintains signal reliability through diversity gain, enabling effective operation in high-user-density environments
3Productivity
If traditional MIMO systems are used to serve growing user density, then system capacity is improved, but signal reliability and efficiency deteriorate in densely populated areas
Solution Approach 1:
The patent integrates traditional MIMO with space-time coding and massive MIMO techniques to create a system that maintains high system capacity while improving signal reliability through diversity gain and interference cancellation, making it suitable for densely populated areas
Data Source
AI summary
Space-time coded massive (STCM) and space-frequency coded (SFC) massive multiple-input multiple-output (MIMO) wireless communication systems and methods of making and using the same are disclosed. The STCM-MIMO system utilizes two massive MIMO antenna arrays that transmit data over two or more channel vectors to a user with at least one receive antenna. This configuration permits the system to use the asymptotic orthogonal qualities of massive MIMO pre-coding to eliminate the interference from other users' channel vectors and signals. The system also maintains the diversity of space-time codes to recover lost data through treating each transmitting massive MIMO array similarly to a 2×1 Alamouti space-time code. The STCM-MIMO wireless system can significantly outperform those using space-time coding techniques only. The SFC massive MIMO wireless system may be similar to the STCM-MIMO wireless system, except for the encoder block. In the exemplary SFC massive MIMO architecture, instead of spreading the code across the time slots, the code is spread across the subcarriers.