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...

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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
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container_title EURASIP journal on wireless communications and networking
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Odabasioglu, Niyazi
Osman, Onur
Ucan, Osman N.
Salehi, Masoud
Shafai, Bahram
description 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
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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
title Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying
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