Improving energy efficiency of partial response signals by using coded modulation

Author

Gorlov, Anton ; Gelgor, Aleksandr ; Popov, Evgenii

Author_Institution

Dept. of Radioelectron. Means of Inf. Protection, Peter the Great St. Petersburg Polytech. Univ., St. Petersburg, Russia

fYear

2015

fDate

18-21 May 2015

Firstpage

58

Lastpage

62

Abstract

One of the most popular approaches to improving bandwidth efficiency is the use of signals with inter-symbol interference (ISI). In this paper bandwidth-efficient partial response signals (PRS) are analyzed in combinations with 4-QAM, 8-QAM and 16-QAM signal constellations and recursive systematic convolutional codes. We simulated transmission of encoded data through AWGN channel using the optimal PRS, each pulse shape gave maximal free Euclidean distance for chosen constellation and bandwidth. Also, we employed iterative receiver (or turbo equalizer) for detection and decoding of these signals. It is shown that the coded PRS exceed trellis-coded modulation and reach turbo trellis-coded modulation in bandwidth and energy characteristics.

Keywords

AWGN channels; convolutional codes; energy conservation; intersymbol interference; modulation coding; quadrature amplitude modulation; 16-QAM signal; 4-QAM signal; 8-QAM signal; AWGN channel; bandwidth efficiency; bandwidth efficient partial response signals; coded modulation; energy efficiency; intersymbol interference; recursive systematic convolutional codes; Bandwidth; Conferences; Constellation diagram; Estimation; Euclidean distance; Receivers; iterative receiver; partial response signals; trellis-coded modulation; turbo equalizer;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking (BlackSeaCom), 2015 IEEE International Black Sea Conference on

Conference_Location

Constanta

Type

conf

DOI

10.1109/BlackSeaCom.2015.7185086

Filename

7185086