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method of synchronization 142 8 6 Specific codes with large indices of comma freedom 146
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acquisition amplitude autocorrelation function average balanced modulated bi-orthogonal codes binary sequence binary signal binary waveforms carrier channel Chapter clock code signals code words column COMBINATION SEQUENCE comma freedom comma-free comma-free codes communication COMPONENT IN PHASE computation correlation function cross-correlation cross-correlation function cyclic detector determine diagram dictionary difference set digit period elementary signals equation error probability example feedback filter frequency given Hadamard design Hadamard matrix I I I incidence matrix indirect logic integration Karnaugh chart log2 loop maximum method modulated wave multiplier n-tuples obtained orthogonal codes output phase modulated phase shift phase-locked loop PN sequences possible power spectrum probability density problem properties quadratic residue random signals ranging code received signal sequence of length shift register sequences shown in Figure simplex code specified spectra spectral density symbols synchronization Theorem tracking trans-orthogonal code transmitted signals truth table TT ft variables ZERO's