Pseudo Propagation Channel Generation for MIMO Resource Efficiency
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Solution Overview
Problem
Existing communication systems, particularly MIMO and beam forming techniques, face inefficiencies in utilizing frequency resources due to high cross-correlation between propagation channels, limiting the number of parallel data transmissions and overall communication capacity.
Innovation Solution
The method generates pseudo propagation channel characteristics that approximate actual channel characteristics, allowing for independent data transmission over previously unused diagonal channels, thereby reducing cross-correlation and enhancing resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional MIMO and beam forming techniques are used, then data transmission between multiple antennas is achieved, but frequency resource utilization efficiency is insufficient due to high cross-correlation between propagation channels
Solution Approach 1:
The patent creates pseudo propagation channel characteristics that replicate the frequency characteristics of actual channels but with reduced cross-correlation. These pseudo characteristics are used to process data signals, allowing multiple parallel data transmissions that would otherwise be blocked by high cross-correlation between actual propagation channels.
Solution Approach 2:
The patent transforms actual propagation channel characteristics into pseudo characteristics by changing the parameter space representation. This transformation maintains the essential frequency characteristics needed for data transmission while modifying the correlation properties to enable more efficient resource utilization.
2Productivity
If propagation channels on diagonal lines are used, then more parallel data transmissions are enabled, but cross-correlation between channels increases limiting transmission reliability
Solution Approach 1:
The patent generates pseudo propagation channel characteristics that copy the frequency characteristics of actual channels including diagonal line channels, while transforming them to have lower cross-correlation. This allows reliable data transmission over previously unusable diagonal channels.
Solution Approach 2:
The patent introduces pseudo propagation channel characteristics as an intermediary between the actual physical channels and the data transmission process. These pseudo characteristics serve as a transformed representation that enables multiple parallel transmissions while maintaining sufficient reliability through reduced cross-correlation.
3Productivity
If the number of antennas is increased to improve transmission capacity, then more data can be transmitted in parallel, but system complexity and cost increase
Solution Approach 1:
The patent enables existing antenna systems to perform multiple functions by utilizing pseudo propagation channel characteristics. The same physical antennas can transmit multiple parallel data streams by processing signals through the transformed pseudo channel characteristics, eliminating the need for additional antennas.
Solution Approach 2:
The patent changes the parameter space of channel characteristics to enable multiple parallel transmissions through signal processing rather than adding physical antennas. This transforms the transmission capacity limitation from a hardware constraint to a software-based solution.
Data Source
AI summary
A technique capable of realizing improvement of utilization efficiency of resources such as frequency with respect to MIMO, beam forming, and the like is provided. A transmission/reception method according to an embodiment is a transmission/reception method of transmitting and receiving data between a transmission device 1 with a plurality of transmitting antennas and a reception device 2 with a receiving antenna, and includes: a generating step of generating, by the transmission device 1 or the reception device 2, characteristics of a plurality of pseudo propagation channels on a basis of characteristics of a plurality of actual propagation channels between the plurality of transmitting antennas and the receiving antenna, the characteristics of the plurality of pseudo propagation channels being characteristics similar to frequency characteristics to an extent that the frequency characteristic can be approximated with respect to the characteristics of the plurality of actual propagation channels; a transmitting step of creating, by the transmission device 1, one or more data to be transmitted by reflecting the characteristics of the plurality of pseudo propagation channels to a plurality of parallel and independent data, and transmitting the one or more data from the plurality of transmitting antennas as radio waves; and a receiving step of extracting, by the reception device 2, the plurality of parallel and independent data from one or more received data received as the radio waves by the receiving antenna on a basis of the characteristics of the plurality of pseudo propagation channels.