Cable loss equalization system used in wireless communication eq

Details Cable loss equalization system used in wireless communication eq Cable loss equalization system used in wireless communication eq

1996-06-21

1998-05-19

Eisenzopf, Reinhard J.

Telecommunications

Carrier wave repeater or relay system

With transmission line

455 31, 455 674, 455 69, 455127, 4552321, 330129, 333 28R, H04B 336

Patent

active

057549435

ABSTRACT:
In a wireless communication apparatus arranged by an indoor unit, an outdoor unit, and a cable used to connect the indoor unit with the outdoor unit, a gain of an amplifier is automatically set. This amplifier amplifies a lowered level of a signal caused by a cable loss. To perform such an automatic gain setting operation, a cable loss equalization system is used in this wireless communication apparatus. The cable loss equalization system compensates for a reduction in a level of a main signal caused by the cable. The indoor unit comprises: an amplifier for amplifying at least one of a main transmit signal and a main receive signal; a first power source for supplying a first power source voltage to the indoor unit and a second power source of the outdoor unit; transmitting means for transmitting the first power source voltage via the cable to the outdoor unit; receiving means for receiving a second power source voltage supplied to the second power source of the outdoor unit from this outdoor unit; and a first control unit for measuring a voltage difference between the first power source voltage and the second power source voltage to thereby perform a gain setting operation of the amplifier.

REFERENCES:
patent: 4087762 (1978-05-01), Ashley
patent: 4488126 (1984-12-01), Suthers
patent: 4768204 (1988-08-01), Zeiss
patent: 5442811 (1995-08-01), Kobayashi et al.
HET PTT-BEDRIJF, "Equalization of Coaxial Cables for Video Transmissions", H. Kraaijenbrink vol. 16, No. 2, Mar. 1969, pp. 101-107.

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