SC-FDMA Multi-Antenna Frequency Allocation for Interference Suppression
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Solution Overview
Problem
Conventional SC-FDMA schemes fail to effectively combine multi-antenna transmission with adequate frequency allocation, leading to quality degradation due to interference and inefficient frequency use.
Innovation Solution
A wireless communication method that allocates frequency bands to multiple antennas individually, allowing for selection between different or same frequency bands based on the communication environment, and measures received quality to optimize data transmission in SC-FDMA schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency bands are allocated to multiple antennas in the conventional SC-FDMA scheme, then multi-antenna transmission capability is provided, but interference components increase causing quality degradation
Solution Approach 1:
The patent applies local quality by allocating different frequency bands to different antennas based on their specific channel characteristics. Each antenna receives a customized frequency allocation that matches its propagation environment, thereby reducing interference while maintaining multi-antenna transmission capability. This is achieved through the frequency allocating section that individually allocates frequency bands to each antenna according to channel quality information.
2Speed
If frequency bands are allocated to multiple antennas, then transmission speed can be improved, but frequency use efficiency decreases due to inadequate allocation
Solution Approach 1:
The patent implements dynamics by making frequency allocation adaptive to changing communication environments. The system dynamically adjusts frequency band allocation to multiple antennas based on real-time channel quality information, ensuring both high transmission speed and efficient frequency utilization. The frequency allocating section continuously optimizes allocations as channel conditions vary, preventing waste of frequency resources while maintaining high-speed transmission.
3Productivity
If same frequency bands are allocated to multiple antennas, then frequency use efficiency improves, but interference between antennas increases
Solution Approach 1:
The patent applies parameter changes by varying the frequency band allocation parameters for each antenna based on channel quality. Instead of using fixed or identical frequency allocations, the system changes frequency parameters dynamically to match each antenna's propagation characteristics. This resolves the contradiction by allowing frequency reuse (improving efficiency) while avoiding harmful interference through parameter optimization.
4Object-affected harmful factors
If different frequency bands are allocated to multiple antennas, then interference between antennas is reduced, but frequency use efficiency decreases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into different bands and allocating them to different antennas based on channel conditions. This segmentation approach allows the system to reduce interference through frequency separation while maintaining efficient utilization by intelligently assigning segments to appropriate antennas. The frequency allocating section performs this segmented allocation to balance interference reduction with frequency efficiency.
Data Source
AI summary
When the SC-FDMA method is used in combination with the multi-antenna transmission technique, a radio transmission method effectively improves the frequency use efficiency by performing appropriate frequency allocation to a plurality of antennas while suppressing degradation of the reception quality caused by interference. In the radio transmission method of the SC-FDMA type, according to the number of terminals simultaneously accessing a base station within a usable frequency band, it is possible to allocate all the transmission signals (transmission stream) to be transmitted by different antennas to different frequency bands or to use the MIMO transmission in combination. Moreover, according to the number of terminals making an access, the number of terminals which perform the MIMO transmission can be varied.