Convolutional spectral shaping

A new spectral shaping technique, convolutional spectral shaping (CSS), is introduced. In CSS, equivalence classes of possible sign bit sequences are represented by a coset of a convolutional code and a search through the trellis of the code is used to pick a sequence from the selected coset to appr...

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Veröffentlicht in:	IEEE communications letters 1999-01, Vol.3 (1), p.9-11
Hauptverfasser:	Daeyoung Kim, Eyuboglu, M.V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Approximation Cascading style sheets Convolution Convolutional codes Filters Modems Modulation coding Phase change materials Pulse code modulation Pulse modulation Searching Simulation Spectra Spectral shape Telecommunication standards Telecommunications Unions
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Beschreibung
Zusammenfassung:	A new spectral shaping technique, convolutional spectral shaping (CSS), is introduced. In CSS, equivalence classes of possible sign bit sequences are represented by a coset of a convolutional code and a search through the trellis of the code is used to pick a sequence from the selected coset to approximate a target spectral shape for transmission. Simulation results are included to illustrate the performance of CSS. A version of CSS has been adopted by the International Telecommunication Union (ITU) in the pulse code modulation (PCM) modem standard V.90.
ISSN:	1089-7798 1558-2558
DOI:	10.1109/4234.740114