Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying

A novel type of turbo coded modulation scheme, called multilevel turbo coded-continuous phase frequency shift keying (MLTC-CPFSK), is designed to improve the overall bit error rate (BER) and bandwidth efficiency. Then, this scheme is combined with a new double decision feedback equalizer (DDFE) to r...

Full description

Saved in:
Bibliographic Details
Published in:EURASIP journal on wireless communications and networking 2008-01, Vol.2008 (1), p.458785, Article 458785
Main Authors: Bayat, Oguz, Odabasioglu, Niyazi, Osman, Onur, Ucan, Osman N., Salehi, Masoud, Shafai, Bahram
Format: Article
Language:English
Subjects:
Algorithms
Codes
Communication
Communications Engineering
Design
Engineering
Information Systems Applications (incl.Internet)
Networks
Research Article
Satellite communications
Signal processing
Signal,Image and Speech Processing
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel type of turbo coded modulation scheme, called multilevel turbo coded-continuous phase frequency shift keying (MLTC-CPFSK), is designed to improve the overall bit error rate (BER) and bandwidth efficiency. Then, this scheme is combined with a new double decision feedback equalizer (DDFE) to remove the interference and to enhance BER performance for the intersymbol interference (ISI) channels. The entire communication scheme is called multilevel turbo equalization-continuous phase frequency shift keying (MLTEQ-CPFSK). In these schemes, parallel input data sequences are encoded using the multilevel scheme and mapped to CPFSK signals to obtain a powerful code with phase continuity over the air. The performances of both MLTC-CPFSK and MLTEQ-CPFSK systems were simulated over nonfrequency and frequency-selective channels, respectively. The superiority of the two level turbo codes with 4CPFSK modulation is shown against the trellis-coded 4CPFSK, multilevel convolutional coded 4CPFSK, and TTCM schemes. Finally, the bit error rate curve of MLTEQ-CPFSK system over Proakis B channel is depicted and ISI cancellation performance of DDFE equalizer is shown against linear and decision feedback equalizers
ISSN:1687-1499
1687-1472
1687-1499
DOI:10.1155/2008/458785