Signal-Code Constructions without Zero Spectral Component

A method is proposed for generating signal-code constructions whose spectrum does not contain the zero frequency. The constructions are based on generalized concatenated codes with signals in the inner stage and error-correcting codes in the outer stage. Examples of constructions are given. Viterbi maximum-likelihood decoding of the constructions is considered. Examples of decoder simulation in a Gaussian channel are described. Numerical results for the frequency spectrum are presented.