Multi-Antenna Beamforming for Simultaneous Multi-Stream Transmission
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Solution Overview
Problem
Existing communication methods using multiple antennas lack further improvements in performance, particularly in enhancing data reception quality and communication rates.
Innovation Solution
A transmitting device that includes a signal processor to generate baseband signals for multiple streams, which are then transmitted as signals with different directivities using a plurality of antennas simultaneously, allowing for improved performance through beamforming and directivity control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional MIMO communication method is used with multiple antennas transmitting simultaneous signals, then data reception quality and communication rate can be enhanced, but further performance improvement is limited
Solution Approach 1:
The patent segments the transmission by creating multiple beams from a single baseband signal, where each beam is directed toward different spatial directions. This segmentation allows the system to serve multiple reception points simultaneously with differentiated signal paths, thereby improving both communication rate and reception quality without requiring additional independent data streams
Solution Approach 2:
The patent introduces spatial dimensionality by generating beams with different directivities in various directions. Instead of only varying signals in time or frequency domains, the system exploits the spatial dimension to create multiple transmission paths, enabling improved performance by transmitting signals toward different spatial locations simultaneously
2Reliability
If a single baseband signal is transmitted through multiple antennas, then signal transmission can be achieved, but communication performance cannot be further improved
Solution Approach 1:
The patent applies local quality by generating beams with different directivities tailored to different spatial directions. Each beam is optimized for its specific direction, allowing the system to improve communication performance locally in each direction while maintaining overall transmission efficiency. This enables the single baseband signal to serve multiple spatial zones with direction-appropriate signal characteristics
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances communication performance by improving data reception quality and communication rates using multiple antennas.
Implementation Method 1
generates, from the first baseband signal, a plurality of first transmission signals having different directivities, generates, from the second baseband signal, a plurality of second transmission signals having different directivities
Data Source
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AI summary
A transmitting device includes a plurality of transmission antennas, and includes: a signal processor which generates a first baseband signal by modulating data of a first stream, and a second baseband signal by modulating data of a second stream; and a transmitter which generates, from the first baseband signal, first transmission signals having different directivities, generates, from the second baseband signal, second transmission signals having different directivities, and transmits the first transmission signals and the second transmission signals at a same time.