研究目的
Investigating the performance of a low-cost millimeter-wave repeater for range extension in a 5G fixed wireless access system.
研究成果
The low-cost repeater demonstrated sufficient linearity over long fronthaul link lengths and excellent EVM values with high signal-to-noise ratios, enabling high data rates for future 5G fixed access systems. The results suggest that much longer link lengths could be achieved with higher transmit power levels.
研究不足
The study was limited by the sub-optimum signal source equipment which affected the EVM values, especially on the outermost carriers. Additionally, the indoor measurements had slightly reduced link lengths compared to outdoor tests.
1：Experimental Design and Method Selection:
The study focuses on the development and testing of a low-cost repeater for 5G fixed wireless access systems, utilizing a simple radio frequency converter with amplify and forward architecture.
2：Sample Selection and Data Sources:
The repeater was tested outdoors and indoors with LTE and 5GTF pre-5G test signals.
3：List of Experimental Equipment and Materials:
The setup included a synthesizer board, downlink and uplink boards, horn antennas, low noise amplifiers, mixers, and band pass filters.
4：Experimental Procedures and Operational Workflow:
The repeater was tested for downlink and uplink paths with varying link lengths and signal bandwidths, using LTE and 5GTF pre-5G test signals.
5：Data Analysis Methods:
The performance was evaluated based on signal-to-noise ratios and error vector magnitude (EVM) values.
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