A two-stage sequential demodulator for the Gosset lattice

Author

Secord, Norman P. ; De Buda, Rudi

Author_Institution

Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada

Volume

7

Issue

6

fYear

1989

fDate

8/1/1989 12:00:00 AM

Firstpage

974

Lastpage

981

Abstract

A construction of the Gosset lattice is considered that has practical advantages over other constructions of the same lattice. Codes derived from this construction have been shown to exhibit a null at DC in their baseband spectrum. A two-stage approach to the demodulation of this construction of the Gosset lattice is discussed. This demodulator consists of an initial stage which may declare erasures and a secondary stage designed to correct erasures. A study of erasure events is made and then used to reduce the number of steps in the second-stage correction algorithm. While the overall demodulator is somewhat more complex than a straight forward maximum-likelihood demodulator designed for this construction, the present structure has the advantage of greater speed

Keywords

codes; demodulation; demodulators; Gosset lattice; baseband spectrum; codes; demodulation; erasure events; maximum-likelihood demodulator; second-stage correction algorithm; two-stage sequential demodulator; Baseband; Demodulation; Error correction; Gain; Gaussian channels; Helium; Intersymbol interference; Lattices; Modulation coding; Quadrature amplitude modulation;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.29619

Filename

29619