METHOD AND DEVICE FOR INCREASING INTERFERENCE RESISTANCE OF A RECEIVER Russian patent published in 2007 - IPC H03G3/20 H04B1/06 

FIELD: radio communications.

SUBSTANCE: in accordance to the invention, in the method and in the device, power level of received signal is determined. If the power level equals or exceeds a predetermined threshold value, then amplifier 703 with low inherent noises is bridged 730. In alternative realizations, detector is used for high level of radio frequency power 105 for controlling amplification coefficient of input cascade 110 as a function of interference power. Continuous control over amplification coefficient makes it possible to suppress interference and to synchronize sensitivity of the receiver at lower signal levels, compared to the case of block with radio frequency amplification coefficient commutation block 730. Method of the invention allows synchronization of amplification coefficient at input with a predetermined value 1601. during operation of the receiver, change of control coefficient power of intermediate frequency signal 1605 is measured. If aforementioned change is less than the predetermined value 1610, then level of interference and signal is below the minimal noise level and, therefore, amplification coefficient is increased 1615. If the change of power of intermediate frequency signal exceeds a predetermined value, then presence of distortions is obvious and amplification coefficient is decreased to decrease the level of inter-modulation components 1620. Aforementioned process is used to produce best trade-off between interferences and noise factor during operation of the receiver.

EFFECT: increased interference resistance of radio signal receiver.

6 cl, 16 dwg