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Combined spatial diversity and time ...

Skoro Kaskarovska, Violeta.

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Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications./
Author:	Skoro Kaskarovska, Violeta.
Description:	157 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
Contained By:	Dissertation Abstracts International77-08B(E).
Subject:	Ocean engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10095894
ISBN:	9781339600703

Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications.
Skoro Kaskarovska, Violeta.

Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications. - 157 p.

Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.

Thesis (Ph.D.)--Florida Atlantic University, 2015.

High data rate acoustic communications become feasible with the use of communication systems that operate at high frequency. The high frequency acoustic transmission in shallow water endures severe distortion as a result of the extensive intersymbol interference and Doppler shift, caused by the time variable multipath nature of the channel. In this research a Single Input Multiple Output (SIMO) acoustic communication system is developed to improve the reliability of the high data rate communications at short range in the shallow water acoustic channel. The proposed SIMO communication system operates at very high frequency and combines spatial diversity and decision feedback equalizer in a multilevel adaptive configuration. The first configuration performs selective combining on the equalized signals from multiple receivers and generates quality feedback parameter for the next level of combining. The second configuration implements a form of turbo equalization to evaluate the individual receivers using the feedback parameters as decision symbols. The improved signals from individual receivers are used in the next iteration of selective combining. Multiple iterations are used to achieve optimal estimate of the received signal.

ISBN: 9781339600703Subjects--Topical Terms:

660731
Ocean engineering.

Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications.
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020 $a 9781339600703
035 $a (MiAaPQ)AAI10095894
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040 $a MiAaPQ $c MiAaPQ
100 1 $a Skoro Kaskarovska, Violeta. $3 1913090
245 1 0 $a Combined spatial diversity and time equalization for broadband multiple channel underwater acoustic communications.
300 $a 157 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
500 $a Adviser: Pierre-Philippe Beaujean.
502 $a Thesis (Ph.D.)--Florida Atlantic University, 2015.
520 $a High data rate acoustic communications become feasible with the use of communication systems that operate at high frequency. The high frequency acoustic transmission in shallow water endures severe distortion as a result of the extensive intersymbol interference and Doppler shift, caused by the time variable multipath nature of the channel. In this research a Single Input Multiple Output (SIMO) acoustic communication system is developed to improve the reliability of the high data rate communications at short range in the shallow water acoustic channel. The proposed SIMO communication system operates at very high frequency and combines spatial diversity and decision feedback equalizer in a multilevel adaptive configuration. The first configuration performs selective combining on the equalized signals from multiple receivers and generates quality feedback parameter for the next level of combining. The second configuration implements a form of turbo equalization to evaluate the individual receivers using the feedback parameters as decision symbols. The improved signals from individual receivers are used in the next iteration of selective combining. Multiple iterations are used to achieve optimal estimate of the received signal.
520 $a The multilevel adaptive configuration is evaluated on experimental and simulated data using SIMO system with three, four and five receivers. The simulation channel model developed for this research is based on experimental channel and Rician fading channel model. The performance of the channel is evaluated in terms of Bit Error Rate (BER) and Signal-to-Noise-and-Interference Ratio (SNIR). Using experimental data with non-zero BER, multilevel adaptive spatial diversity can achieve BER of 0 % and SNIR gain of 3 dB. The simulation results show that the average BER and SNIR after multilevel combining improve dramatically compared to the single receiver, even in case of extremely high BER of individual received signals. The results demonstrate the ability of the proposed multilevel adaptive combining approach to significantly improve the performance of the shallow water acoustic channel, while preserving the same transmission power and channel bandwidth.
590 $a School code: 0119.
650 4 $a Ocean engineering. $3 660731
650 4 $a Electrical engineering. $3 649834
650 4 $a Acoustics. $3 879105
690 $a 0547
690 $a 0544
690 $a 0986
710 2 $a Florida Atlantic University. $3 1017837
773 0 $t Dissertation Abstracts International $g 77-08B(E).
790 $a 0119
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10095894