System and method for selectively utilizing an attenuation...

Details System and method for selectively utilizing an attenuation... System and method for selectively utilizing an attenuation...

2007-04-10

2007-04-10

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

C455S200100

Reexamination Certificate

active

10331373

ABSTRACT:
A system and method used for controlling an attenuator in a two-way communication device (100, 200) includes the steps of measuring (211) a relative signal strength indication (RSSI) at the input of the two-way communications device. The RSSI measurement is then compared (213, 217, 223) to both at least one predetermined interference threshold value (T1, T2, T3) and a selective squelch state (219, 225) for determining whether to switch an in-line attenuator to the input of the two-way communications device. The invention provides a method by which an attenuator may be used only when interference is present without it being continually switched in-line to cause signal degradation.

REFERENCES:
patent: 4872204 (1989-10-01), Hammer et al.
patent: 4969207 (1990-11-01), Sakamoto et al.
patent: 5303406 (1994-04-01), Hansen et al.
patent: 2002/0065096 (2002-05-01), Yamamoto

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