RU94025713A - Adaptive noise compensator - Google Patents

Abstract

FIELD: radio engineering. SUBSTANCE: invention may be used in radio communication systems using signals with angular modulation received against background of external noises with unspecified spectrum. Proposed compensator has large working dynamic range, maximal adaptation rate which dependence on signal fades is excluded. Adaptive noise compensator also provides for optimum diversity reception of legitimate signal in absence of noise. It includes first amplifier 1, second adapter 3, third norm amplifier 6, first filter 7, adder 9 connected in series. Output of adder 9 is connected to output of compensator, output of subtracter 10, input of amplifier limiter 11 which output is linked to second input of subtracter 10. Output of subtracter 10 is connected to inputs of first 7 and second 8 quadrature filters. Second norm amplifier 2 is coupled to input of second quadrature filter 8 which output is connected to second input of first adder 9 and to output of third quadrature filter 4 whose output is connected to second input of second adder 3. Second input of quadrature filter 4 is coupled through amplifier-inventer 5 to output of adder 3. EFFECT: larger working range, maximum adaptation rate of compensator. 2 dwg

Claims (1)

The invention relates to the field of radio engineering and can find application in radio communication systems using signals with angular modulation, received against the background of external interference with an arbitrary spectrum. The jammer has a larger working dynamic range, maximum adaptation speed, and its dependence on signal fading is excluded. The jammer also provides optimal diversity of the desired signal reception in the absence of interference. The interference compensator comprises in series a first normalizing amplifier 1, a second adder 3, a third normalizing amplifier 6, a first quadrature filter 7, an adder 9, the output of which is connected to the output of the device, the input of the subtractor 10, the input of the amplitude limiter 11, the output of which is connected to the second input of the subtractor 10. The output of the subtractor 10 is connected to the inputs of the first 7 and the second quadrature filter 8. The second normalizing amplifier 2 is connected to the input of the second quadrature filter 8, the output of which is connected to the second input of the first of the adder 9 and the third input of the quadrature filter 4, the output of which is connected to the second input of the second adder 3. The second input of the quadrature filter 4 is connected via an amplifier-inverter 5 with the output of the adder 3.