Design and implementation of an efficient point slicing algorithm for the V.34 modem standard

Author

Tanrikulu, Oguz

Author_Institution

DSP Software Eng. Inc., Bedford, MA, USA

Volume

4

fYear

1999

fDate

15-19 Mar 1999

Firstpage

2183

Abstract

The V.34 modem standard uses QAM constellations with 4 to 1664 points depending upon the results of the line probing where the telephone channel is characterized to connect at the maximum possible data rate. In the receiver, the decisions errors due to the channel noise are prevented by using the Viterbi subset decoder which uses a point slicing algorithm that determines the closest valid point on the constellation for a given constellation size. In this paper we present a point slicing algorithm where the complexity is nearly independent of the QAM constellation size

Keywords

Viterbi decoding; computational complexity; modems; quadrature amplitude modulation; telecommunication channels; telecommunication standards; QAM constellations; V.34 modem standard; Viterbi subset decoder; channel noise; complexity; constellation size; data rate; decisions errors; efficient point slicing algorithm; line probing; telephone channel; Algorithm design and analysis; Constellation diagram; Convolutional codes; Decoding; Modems; Partitioning algorithms; Quadrature amplitude modulation; Signal processing algorithms; Transmitters; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.758368

Filename

758368