Low frequency suppression of baseband coded sequences

Author

Botha, L. ; Ferreira, H.C.

Author_Institution

Cybernetics Lab., Rand Afrikaans Univ., Aucklandpark, South Africa

fYear

1993

fDate

34187

Firstpage

46

Lastpage

51

Abstract

Two classes of sequences with favourable low frequency spectral suppression are considered. They are sequences with higher order zeroes at zero frequency and sequences which comply to restrictions on the time between crossings of the average RDS value. It is shown how these sequences can be used to transmit a conventional analog speech channel on the same channel as a digital signal, but totally independent from it. An optimization problem regarding the choice of a code sequence for a specific application is then considered, and finally a new code with suppressed low frequencies is presented

Keywords

binary sequences; codes; interference suppression; subscriber loops; analog speech channel; asymmetrical digital subscriber line; baseband coded sequences; binary sequences; digital signal; higher order zeroes; low frequency spectral suppression; optimization problem; zero frequency; Africa; Baseband; Communication channels; Couplings; Cybernetics; Decision support systems; Frequency; Intersymbol interference; Laboratories; Speech;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Signal Processing, 1993., Proceedings of the 1993 IEEE South African Symposium on

Conference_Location

Jan Smuts Airport

Print_ISBN

0-7803-1292-9

Type

conf

DOI

10.1109/COMSIG.1993.365875

Filename

365875