| 摘要 |
FIELD: radio technology, radar, radio navigation; apparatus is used in radio systems, which require to exercise optimal processing of in advance known signals at noise background. SUBSTANCE: aim is to increase output of signal to noise ratio and to improve correlation properties of signals without widening their spectrums. Apparatus is optimal filter based on shift register, memory register, multipliers and adder and is distinguished for the fact, that in contrast to known similar apparatuses adder is not exercising calculation until all calculated products of input signal with reference signal simultaneously are in given range of values defined by input signal to noise ratio. For the purpose apparatus has threshold devices, number of which corresponds to number of multipliers, and coincidence "AND" gate, that is activated during threshold devices simultaneous action, generating signal allowing to exercise summing operation by adder. During δ pulse feeding to input of the apparatus signal at output of apparatus is absent. During white noise feeding to apparatus input and with low given threshold value signal at output is also absent. It allows to draw conclusion, that signal to noise ratio at output of the apparatus during low noise at input is aimed at very high values. EFFECT: increased output of signal to noise ratio and improved correlation properties of signals without widening their spectrums. |
