作者: Kenji Okita , Masahiko Tanaka
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摘要: An RSSI detector 2 detects the electric field level of a received signal, and transmission rate determiner 5 determines an initial value from detected level. A radio unit 1 transmits determined to base station 20. In response thereto, 20 control signal at assigned value. bit error 4 finely regulates according rate. optimal is thus determined.