A Consideration on Interference Measurement Method of Repeater System for Mobile Communications Using Doppler Frequency Shift (Japanese Edition)

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  • ドップラーシフトを用いた移動通信レピータ回り込み干渉評価法の考察

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Although the repeater system of mobile communications in rural and mountain areas is very effective and economy in order to expand extra service areas, there are several serious problems on interference issue. Loop interferences are caused by both antenna coupling and scattering waves from service area. However, it is difficult to evaluate the scattering waves easily because radio propagation environments are very complex. An interference measurement method of repeater system for mobile communications using Doppler frequency shift is proposed and discussed in this letter.

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