METHOD OF SEARCHING FOR NOISE-LIKE SIGNALS WITH MINIMUM FREQUENCY-SHIFT KEYING

摘要

FIELD: radio engineering, communication.SUBSTANCE: on each search cycle, the input signal is split into quadrature components which are integrated on intervals equal to duration of the code sequence element, and the integration results are stored over a time interval equal to the signal repetition period. N values of the modulus of the cross-correlation function are calculated in real time with clock frequency selected based on the condition of enabling calculation of N values of the modulus of the cross-correlation function in real time. Results of integrating the elements are multiplied with elements of reference quadrature code sequences. Values of quadrature components of the cross-correlation function are calculated by integrating N combined multiplication results. The greatest of the N values of the modulus of the cross-correlation function is selected; code sequence delay is estimated; the code generator is synchronised with the received noise-like signal with minimum frequency-shift keying.EFFECT: faster search for noise-like signals with high noise-immunity of reception and low hardware costs.2 dwg