Title :
Convolutional spectral shaping
Author :
Kim, Daeyoung ; Eyuboglu, M. Vedat
Author_Institution :
Motorola Inf. Syst. Group, Mansfield, MA, USA
Abstract :
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.
Keywords :
binary sequences; convolutional codes; modems; pulse code modulation; spectral analysis; telecommunication standards; ITU; International Telecommunication Union; PCM; V.90 modem standard; code trellis search; convolutional code; convolutional spectral shaping; pulse code modulation; sign bit sequences; simulation results; target spectral shape; Cascading style sheets; Convolution; Convolutional codes; Filters; Modems; Modulation coding; Phase change materials; Pulse modulation; Spectral shape; Telecommunication standards;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.740114
