Receiver with dynamic attenuation control for adaptive intermodu

Details Receiver with dynamic attenuation control for adaptive intermodu Receiver with dynamic attenuation control for adaptive intermodu

1996-06-21

1999-06-01

Crosland, Donnie L.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455230, 455 671, 455 673, H04B 116

Patent

active

059096454

ABSTRACT:
Improved radio receiver designs can be used in the operational environment of wireless telephone communications. The radio receiver includes a variable attenuator, an RF signal amplifier, and a controller. The controller controls the amount of attenuation provided by the variable attenuator in response to signals received by the RF signal amplifier. The controller adjusts the variable attenuator to achieve a minimum symbol error rate and/or to maximize the signal-to-noise and interference ratio for a desired signal, irrespective of the levels of any interfering signals received by the RF signal amplifier. In this manner, the variable attenuator is adjusted to obtain just the right amount of intermodulation performance for a given set of receiving conditions. This technique saves operating current and minimizes noise figure because, in practice, interference conditions do not persist all of the time, and are usually of temporary duration.

REFERENCES:
patent: 5321849 (1994-06-01), Lemson

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