Transmission Device Frequency Allocation for Relative Speed Adaptation
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Solution Overview
Problem
Current communication methods using multiple antennas, such as MIMO, face limitations in performance improvement, especially in multicast/broadcast communications, where existing technologies do not effectively adapt to varying relative speeds between communication apparatuses.
Innovation Solution
A transmission apparatus that differentiates signals based on relative speeds by using distinct frequency domains for communication with apparatuses moving at different speeds, employing a signal processor to generate and transmit signals addressed to specific communication apparatuses with tailored frequency allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single frequency domain is used for transmitting signals to all communication apparatuses, then device complexity is reduced, but communication performance deteriorates due to inability to adapt to varying relative speeds
Solution Approach 1:
The frequency domain is segmented into multiple subbands, with different subbands allocated to communication apparatuses based on their relative speeds. This allows the system to adapt to varying speed conditions while maintaining manageable signal processing through structured frequency allocation.
Solution Approach 2:
Different frequency domains are assigned to different communication apparatuses according to their specific relative speeds. This local optimization of frequency allocation ensures each apparatus receives signals optimized for its motion characteristics, improving overall communication performance without requiring complete system redesign.
2Reliability
If frequency domain segmentation is implemented to adapt to different relative speeds, then communication performance is improved, but device complexity increases due to multiple signal processing paths
Solution Approach 1:
The system changes the frequency domain parameter of transmitted signals based on the relative speed of communication apparatuses. By adjusting which frequency subband is used for transmission, the system adapts to different motion conditions and improves data reception quality without requiring complex structural modifications.
Solution Approach 2:
The frequency domain allocation is dynamically adjusted according to the relative speed of each communication apparatus. This dynamic adaptation allows the system to respond to changing motion conditions in real-time, improving reliability while maintaining a relatively simple transmission structure through parameter adjustment rather than structural complexity.
Data Source
AI summary
Provided is a transmission device, and with respect thereto, a first communication device and a second communication device have different relative speeds. The transmission device generates a first signal destined for the first communication device and a second signal destined for the second communication device. In a first period, the transmission device transmits the first signal using a first frequency region and transmits the second signal using a second frequency region.