Student:  Nazia Sarwat Islam Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2013         Description: LZ77, LZ78, and LZW84 are universal lossless data compression algorithms for reducing redundancy. A modified version of these algorithms that takes into account both forward and reverse readings is presented in this work. It is shown

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Student:  Dawit Andualem Nigatu Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Fall 2013         Description: In the previous project, we used classical multidimensional scaling (CMD) to scale down  the 64 x 64 ECM mutation matrix and 20 x 20 amino acid chemical distance matrix to 2  dimensions (2-D). From the 2-D representations,

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Student:  Dawit Andualem Nigatu Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2013         Description: This research contains two separate parts. In the first part, we have used classical multidimensional scaling (CMD) technique to scale down a 64-dimensional empirical codon mutation (ECM) matrix and a 20-dimensional chemical distance matrix to two dimensions

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Student:  Thejani Himalika Fernando Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Fall 2012         Description: We designed and constructed a suitable circuit for detecting and measuring the power line impulse noise which appears between live and neutral lines as well as between neutral and earth lines. Our study also involved in measuring

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Student:  Mohammad Ismail Hossain Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Fall 2011         Description: We address noise which is impulsive, non-Gaussian, and follows a heavy-tailed distribution. In wireless communications, often noise is considered as an additive white Gaussian noise (AWGN). In reality, receivers have omnidirectional capability and it receives many signals

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Student:  Asif Ahmed Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2011         Description: The project had to aspects. We carried out first multi-antenna measurements of impulse noise in the 2.4 GHz range caused by car ignition and other sources. Additionally, a new circuit was design for wirelines impulse-noise measurements in common

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Student:  Maja Taseska Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2010         Description: The combination of multicarrier modulation (OFDM, DMT) and Multiple- Input Multiple-Output (MIMO) transmission significantly improves the quality and efficiency of modern communication systems. The peak-toaverage ratio problem in multicarrier modulation requires additional transmitter side processing which may get

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Student:  Osama Furqan Khan Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2010         Description: In contemporary communication systems, Turbo coding is an important channel coding method which results in extremely low bit-error ratios (BER) at signal-tonoise ratios (SNRs) within 1 dB off the Shannon Limit. The BCJR algorithm is used as

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Student:  Jalal Etesami Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2013         Description: Lattice Codes show good performance and can approach the capacity of additive white Gaussian noise channel. In the Lattice Codes a codeword x is generated by a linear transformation of corresponding integer message vector d, i.e., x =GTd, where G

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Student:  Oana Graur Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2009         Description: Impulse noise has long been known for causing transmission errors. The current thesis presents a method of mitigating impulse noise using a Normalized LMS canceler which takes as reference input the common mode signal and subtracts the adapted

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Student:  Ina Kodrasi Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Fall 2008         Description: This report studies the encoding of Reed-Solomon codes with consecutive time and DFT domain redundancy. Many data transmission schemes rely on Reed-Solomon codes for error correction, therefore a thorough comprehension of their properties would be very constructive. An

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Student:  Jalal Etesami Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Fall 2008         Description: We introduce a new algorithm for constructing LDPC codes based on a Protograph. With Protographs, we have a base graph (mother graph), which is duplicated a number of times followed by a special edge permutation obtaining the largest

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Student:  Guftaar Ahmad Sardar Sidhu Advisor: Prof. Dr.-Ing. Werner Henkel, Khaled Shawky Hassan Time frame: Fall 2008         Description: In this work we look into the problem of inter-user interference in multiuser MIMO systems. We disscuss two different SDMA MIMO schemes. The first scheme, the orthogonal SDMA, completely eliminates the inter-user interferance. It

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Student:  Guftaar Ahmad Sardar Sidhu Advisor: Prof. Dr.-Ing. Werner Henkel, Khaled Shawky Hassan Time frame: Spring 2008         Description: In this work, we consider the downlink transmission of a multiuser system. Both the Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) antenna systems between the base station (BS) and the

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Student:  David Kronmüller Advisor: Prof. Dr.-Ing. Werner Henkel, Neele von Deetzen Time frame: Spring 2008         Description: The demand for higher communication data rates is immense in the era of high quality multimedia content. The issue at hand is to increase data transfer rates while improving error tolerance lev- els. Turbo codes

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Student:  Behrouz Touri Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2008         Description: Binary linear codes are one of the main tools for error-control coding over telecommunication channels and data storage devices. However, despite of having very simple encoder structures, their optimum decoding is usually a hard problem in practice. In

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Student:  Karim Ibrahim Khashaba Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2007         Description: This thesis examines the benefits of using adaptive modulation in terms of bit error probability. Specifically, we examine the performance enhancement made possible by using linear prediction along with channel estimation in conjunction with adaptive modulation. We

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Student:  Guftaar Ahmad Sardar Sidhu Advisor: Prof. Dr.-Ing. Werner Henkel, Neele von Deetzen Time frame: Spring 2006         Description: The distance spectrum of an (n,k)-convolutional code is given by a transfer function T(W,D,L). where W,D,L represent the input weight, the output weight, and the length of the sequence, respectively. The task was

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Student:  Behrouz Touri Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2007         Description: In this project, our objective was to study the channel response of water filled ducts. Our motivation to do such a project was to see the possibilities of information transmission using water-filled pipes. Since water pipes are frequently

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Student:  Vlad-Andrei Lazar (undergraduate student at IUB) Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: Spring 2005     Description: We calculate the error probabilities in Reed-Solomon coded words taking into account both errors and erasures. This is calculated for Gray coded QAM constellations assuming only one bit to be erroneous. The occurring errors and erasures

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Student:  Neele von Deetzen (diploma student of the University of Bremen and now PhD student at Jacobs University) Advisor: Prof. Dr.-Ing. Werner Henkel, Prof. Dr.-Ing. Karl Dirk Kammeyer Time frame: August 31, 2004, February 28, 2005         Description: In this work, we discussed possible solutions for achieving unequal error protection based on

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Student:  Vimtakhul Azis (master program FH Darmstadt) Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: February – July 2003 Grants: We appreciate funding by Infineon       Description: The major drawback of multi-carrier transmission is the high peak-to-average power ratio of the time-domain signal resulting from the combination of many carriers (central limit theorem). Without countermeasures,

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Editors: Michael Steinmann, Holger Mehrholz Advisor: Prof. Dr.-Ing. Werner Henkel Time frame: 02/24/2003 – 04/24/2003       Description:In the Studienarbeit a safe web environment is to be provided, which exhibits the following outlined characteristics. As contents of the associated Web environment, sites are to be written, which describe the area and activities and additionally

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