| 摘要 |
FIELD: radio engineering; communication systems using noise-like signals. ^ SUBSTANCE: proposed method includes multiplication of input mixture by reference sync signal, filtering of multiplication results in N frequency channels, amplification, detection, and comparison with first threshold value. High-level structural noise exceeding first threshold value is recovered and respective signals are corrected in input mixture wherein structural noise of first, second, third, etc. levels are sequentially corrected. Upon correction of structural noise input mixture is multiplied by reference sync signal and multiplication result is filtered in N frequency channels. At the same time intermodulation noise is additionally corrected at every correction stage basing on generation of signal copy shifted in frequency relative to reference signal through Omega/2 = pi/2T, where T is data shift length; multiplication of signal copy by input mixture; filtering of convoluted intermodulation products in N frequency channels; comparison of levels of convoluted intermodulation products in each channel with threshold values, threshold being set at each next stage below preceding one; multiplication by reference signal; addition of recovered intermodulation products to recovered signals. ^ EFFECT: enhanced noise immunity in intermodulation noise environment. ^ 1 cl, 1 dwg |
