Noise tolerance of digital demodulator for complex signal system employing binary quantization
Abstract
An approximate expression is derived for the error probability during digital correlation processing of a system of m orthogonal (or quasiorthogonal) systems. In order to simplify the structure of the digital demodulator, binary quantization is considered. The noise tolerance of nonlinear digital and linear analog demodulators is compared for Gaussian and incoherent harmonic interference. Experimental error probabilities which agree well with the theory are obtained by computer modeling of the demodulator. It is found that a nonlinear demodulator employing binary quantization can be improved by adding variable quantizer thresholds.
 Publication:

USSR Rept Electron Elec Eng JPRS UEE
 Pub Date:
 January 1985
 Bibcode:
 1985RpEEE.......20B
 Keywords:

 Binary Data;
 Demodulators;
 Digital Systems;
 Error Analysis;
 Orthogonal Functions;
 Quantum Counters;
 Signal Processing;
 Computer Techniques;
 Data Recorders;
 Frequency Modulation;
 Mathematical Models;
 Orthogonality;
 Random Noise;
 Communications and Radar