DEVICE FOR NOISE REJECTION Russian patent published in 1998 - IPC

FIELD: receivers. SUBSTANCE: device has complex multiplier, noise measurement unit, weights generator, synchronization unit, first and second channels, each of which has serial circuit of non-recursive filter, and recursive filter. In addition first, second, third and fourth inputs of noise measurement unit are connected to second and third outputs of non-recursive filters of first and second channels. First, second and third outputs of noise measurement unit are connected to first and second inputs of complex multiplier and first input of weights generator, which first, second and third outputs are connected to second, third and fourth inputs of recursive filters of both channels. Second and third inputs of complex multiplier are connected to first and second outputs of synchronization unit which third output is connected to five inputs of recursive filters of both channels. Noise measurement unit has meter of inter-period correlation factor and meter of sine and cosine of inter-period noise phase shift, which first input and second and third outputs are joined. Non-recursive filter of each channel has serial circuit of delay gate and subtraction gate, which second input is connected to input of delay gate. Input of non- recursive filter is connected to input of delay gate. First and second outputs of non-recursive filter are connected to input of delay gate and output of subtraction unit. Recursive filter of each channel has first, second and third multipliers and serial circuit of first adder, first delay gate, second adder, second delay gate, third adder and commutator. Goal of invention is achieved by introduced power measurement unit, which first and second inputs are connected to output of recursive filter of corresponding channel and its output is connected to fourth input of weights generator. Other claims of invention disclose design of power measurement unit, weights generator and meter of inter-period correlation factor. EFFECT: increased efficiency of Doppler signal detection, increased bandwidth of detected Doppler shift signals. 3 cl