Receiving Device Spatial Multiplexing Data Separation
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Solution Overview
Problem
Current communication systems, such as frequency diversity systems, face limitations in improving transmission rates due to hardware resource constraints and complexity in data separation processes, especially in radio communications, where the maximum radio transmission speed is not sufficient compared to wire transmission speeds.
Innovation Solution
The implementation of a communication system that uses receiving and transmitting devices with demodulating and modulating means to handle data transmitted through multiple propagation paths with different transfer functions, allowing for improved transmission rates while minimizing the use of frequency bands and simplifying the data separation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency diversity system transmits identical signal by multiple different carriers, then transmission reliability is improved, but transmission rate is not improved significantly and hardware resources are consumed
Solution Approach 1:
The patent divides the original data stream into multiple data streams that are transmitted simultaneously through different propagation paths. This segmentation allows the system to achieve higher transmission rates by parallel transmission while maintaining reliability through diversity, resolving the contradiction between reliability improvement and transmission rate limitation in frequency diversity systems.
Solution Approach 2:
The patent transitions from transmitting identical signals across multiple frequencies (frequency diversity) to transmitting different data streams across multiple propagation paths (spatial multiplexing). This dimensional change from frequency domain to spatial domain enables simultaneous transmission of multiple data streams, thereby improving transmission rate while maintaining reliability.
2Productivity
If multiple radio signals in different channels are used simultaneously for transmission path multiplexing, then transmission rate is improved, but the number of channels required increases and frequency band usage increases
Solution Approach 1:
The patent enables a single channel to serve multiple transmission paths by utilizing different propagation paths (direct wave and reflected wave) within the same frequency band. This multi-functionality allows the system to transmit multiple data streams simultaneously without requiring additional channels, thereby improving transmission rate while avoiding increased frequency band usage.
Solution Approach 2:
The patent exploits the spatial dimension by utilizing different propagation paths (direct and reflected waves) within the same frequency band. This spatial multiplexing approach allows multiple data streams to be transmitted simultaneously through different paths without requiring additional frequency channels, thus resolving the contradiction between transmission rate improvement and channel quantity increase.
3Productivity
If identical channel in identical frequency band is used as different transmission paths by increasing number of transmitting and receiving antennas, then transmission rate is improved, but data separation process becomes extremely complex
Solution Approach 1:
The patent assigns different modulation schemes to different data streams transmitted through different propagation paths. By using distinct modulation characteristics (local quality) for each data stream, the receiver can easily distinguish and separate the data streams without complex processing. This approach simplifies the data separation process while maintaining high transmission rates through parallel transmission of multiple data streams.
4Reliability
If frequency diversity system uses multiple different carriers, then transmission reliability is improved, but hardware resources are consumed and transmission rate is not improved
Solution Approach 1:
The patent segments the data stream into multiple data streams that are transmitted through different propagation paths using a single carrier. This segmentation approach achieves reliability improvement through diversity while avoiding the hardware resource consumption associated with frequency diversity systems that require multiple carriers and complex RF chains for each carrier.
Solution Approach 2:
The patent changes the transmission parameter from multiple carriers (frequency diversity) to multiple propagation paths with different transfer functions (spatial multiplexing). This parameter change enables the system to achieve both reliability improvement and transmission rate improvement without requiring additional hardware resources, as the same RF chain can handle multiple data streams through spatial multiplexing.
Data Source
AI summary
A receiving device includes a first demodulator operable to demodulate data transmitted by at least one of a plurality of propagation paths in a first channel having transfer functions which are different from one another; a second demodulator operable to demodulate data transmitted by at least one of a plurality of propagation paths in a second channel having transfer functions which are different from one another; and a data processor operable to merge the data demodulated by the first demodulator and the data demodulated by the second demodulator.