Pulse or digital communications – Repeaters – Testing
Patent
1992-10-30
1995-01-10
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
380 34, 342118, 342125, 379 58, 379 59, 455 331, 455 531, 455 541, 455 671, 455 676, H04L 2730, G01S 1346
Patent
active
053814444
ABSTRACT:
A radio environment measuring system for measuring a propagation state of radio waves includes: a fixed radio apparatus provided in a base station; a mobile radio apparatus operatively connected to the fixed radio apparatus through the radio waves; the mobile radio apparatus having a repeater unit for receiving a transmission signal from the fixed radio apparatus and sending a returned signal to the fixed radio apparatus; and the fixed radio apparatus having a transmission/reception unit for sending the transmission signal to the mobile radio apparatus and receiving the returned signal from the mobile radio apparatus, and a measuring unit for measuring the propagation state of the radio waves, for example, a propagation distance, direction and reception intensity of the radio waves between the fixed radio apparatus and the mobile radio apparatus based on the transmission signal and the returned signal.
REFERENCES:
patent: 3315257 (1967-04-01), Sauberlich
patent: 3714650 (1973-01-01), Fuller et al.
patent: 3790940 (1974-02-01), Becker
patent: 4593273 (1986-06-01), Narcisse
patent: 4667202 (1987-05-01), Kammerlander et al.
patent: 4907290 (1990-03-01), Crompton
patent: 5208756 (1993-05-01), Song
Fujitsu Limited
Gregory Bernarr E.
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