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Dissertations / Theses on the topic 'EXIT chart'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Riaz, Bilal. "EXIT chart analysis for compressive turbo codes." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66782.

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Turbo codes have achieved near Shannon limit performance in data communication over noisy channels. Recently introduced EXtrinsic Information Transfer (EXIT) Charts [15] have become an essential part of turbo code design and have also been used as a complementary design tool for the traditional bit error rate simulations. Additionally, compressive turbo codes have been shown to achieve near-entropy performance in different source coding problems [1], [46], [74]. The main objective of this thesis is an extension of EXIT charts from turbo channel codes to turbo source codes, as

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2

Hsu, Teh-Hsuan. "Robust concatenated codes for the slow Rayleigh fading channel." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2723.

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3

Karjalainen, J. (Juha). "Broadband single carrier multi-antenna communications with frequency domain turbo equalization." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514295027.

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Abstract This thesis focuses on advanced multi-antenna receiver and transmission techniques to improve the utilization efficiencies of radio resources in broadband single carrier communications. Special focus is devoted to the development of computationally efficient frequency domain (FD) turbo equalization techniques for single and multiuser MIMO frequency selective channels. Another special emphasis is given to transmission power optimization for single user MIMO communications, which takes into account the convergence properties of the iterative equalizer. A new iterative FD soft cancellati

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4

Shepherd, David Peter, and RSISE [sic]. "Optimisation of Iterative Multi-user Receivers using Analytical Tools." The Australian National University. Research School of Information Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20081114.221408.

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The objective of this thesis is to develop tools for the analysis and optimization of an iterative receiver. These tools can be applied to most soft-in soft-out (SISO) receiver components. For illustration purposes we consider a multi-user DS-CDMA system with forward error correction that employs iterative multi-user detection based on soft interference cancellation and single user decoding. Optimized power levels combined with adaptive scheduling allows for efficient utilization of receiver resources for heavily loaded systems.¶ Metric transfer analysis has been shown to be an accurate metho

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5

Benaddi, Tarik. "Sparse graph-based coding schemes for continuous phase modulations." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/16037/1/Benaddi_Tarik.pdf.

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The use of the continuous phase modulation (CPM) is interesting when the channel represents a strong non-linearity and in the case of limited spectral support; particularly for the uplink, where the satellite holds an amplifier per carrier, and for downlinks where the terminal equipment works very close to the saturation region. Numerous studies have been conducted on this issue but the proposed solutions use iterative CPM demodulation/decoding concatenated with convolutional or block error correcting codes. The use of LDPC codes has not yet been introduced. Particularly, no works, to our know

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6

Ylioinas, J. (Jari). "Iterative detection, decoding, and channel estimation in MIMO-OFDM." Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514262203.

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Abstract Iterative receiver techniques, multiple-input – multiple-output (MIMO) processing, and orthogonal frequency division multiplexing (OFDM) are amongst the key physical layer technologies when aiming at higher spectral efficiency for a wireless communication system. Special focus is put on iterative detection, decoding, and channel estimation for a MIMO-OFDM system. After designing separately efficient algorithms for the detection, channel decoding, and channel estimation, the objective is to optimize them to work together through optimizing the activation schedules for soft-in soft-out

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7

Tervo, V. (Valtteri). "Joint multiuser power allocation and iterative multi-antenna receiver design." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526207292.

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Abstract This thesis concentrates on joint optimization of transmit power allocation and receive filtering in multiuser, multi-antenna communications. Due to the increasing number of wireless devices, the design of energy-efficient communication links is becoming increasingly important. In cellular mobile communications, reducing the average power consumption in uplink transmission is beneficial for users in order to extend battery life and, hence, energy efficiency in general. However, the power consumption of the high power amplifier (HPA) at the transmitter depends on the peak power of the

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8

Gilra, Deepak. "A class of non-binary LDPC codes." Texas A&M University, 2003. http://hdl.handle.net/1969/67.

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9

Huusko, J. (Jarkko). "Communication performance prediction and link adaptation based on a statistical radio channel model." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526211473.

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Abstract This thesis seeks to develop a robust semi-analytical performance prediction method for an advanced iterative receiver that processes spatially multiplexed signals that have propagated through frequency-selective receive correlated multiple-input multiple-output (MIMO) wireless communication channels. In a change of perspective, the proposed performance prediction methods are applied at the transmitter, which seeks to attain a target frame error rate (FER) either by adaptive power control or by adaptive modulation and coding (AMC). The performance prediction scheme utilises the statis

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10

Mothi, Venkatesan Sabaresan. "Exit charts based analysis and design of rateless codes for the erasure and Gaussian channels." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1924.

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11

Cleyet-Marel, Julien. "Le développement du système politique tibétain en exil." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM1010.

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Cette thèse de droit public se propose d'étudier le développement du système politique tibétain en exil. Ce travail est basé sur une analyse détaillée des normes tibétaines encadrant le fonctionnement du Gouvernement tibétain en exil et de son Administration centrale, lesquels n'ont pas été reconnus au plan international. Mené principalement sous l'angle du droit constitutionnel tibétain, ce travail décrit le fonctionnement des différentes institutions centrales, instances décisionnelles, ayant autorité au sein de la communauté tibétaine en exil. L'institutionnalisation du pouvoir politique ti

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12

Chehade, Tarek. "Optimisation d'un précodeur MIMO-OFDM dans le contexte de l'estimation aveugle et semi-aveugle du canal de communication." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0077/document.

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L’estimation de canal joue un rôle important dans les communications mobiles sans fil et en particulier dans les systèmes multi-antennes MIMO. Contrairement aux techniques classiques d’estimation de canal basées sur des séquences d’apprentissage ou des symboles pilotes, les techniques aveugles ne nécessitent aucune insertion de symboles d'apprentissage et permettent d'augmenter le débit utile. Les principales difficultés des techniques aveugles résident dans l’ambiguïté présente sur les estimées. Les techniques d’estimation semi-aveugles, basées sur les mêmes méthodes que l’estimation aveugle,

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13

Nhan, Nhat-Quang. "Optimisation de précodeurs linéaires pour les systèmes MIMO à récepteurs itératifs." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0062/document.

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Les standards « Long-term evolution » (LTE) et LTE-Advanced (LTE-A) devraient influencer fortement l’avenir de la cinquième génération (5G) des réseaux mobiles. Ces normes exigent de hauts débits de données et une qualité de service de très bon niveau, ce qui permet d’assurer un faible taux d’erreur, avec une faible latence. Par ailleurs, la complexité doit être limitée. Dans le but de déterminer des solutions technologiques modernes qui satisfont ces contraintes fortes, nous étudions dans la thèse des systèmes de communication sans fil MIMO codés. D’abord, nous imposons un simple code convolu

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14

Uhlemann, Elisabeth. "Adaptive Concatenated Coding for Wireless Real-Time Communications." Doctoral thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-369.

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The objective of this thesis is to improve the performance of real-time communication overa wireless channel, by means of specifically tailored channel coding. The deadlinedependent coding (DDC) communication protocol presented here lets the timeliness and thereliability of the delivered information constitute quality of service (QoS) parametersrequested by the application. The values of these QoS parameters are transformed intoactions taken by the link layer protocol in terms of adaptive coding strategies.Incremental redundancy hybrid automatic repeat request (IR-HARQ) schemes usingrate compa

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15

CORRÊA, Fernanda Regina Smith Neves. "Mapeamento de bits para adaptação rápida a variações de canal de sistemas QAM codificados com LDPC." Universidade Federal do Pará, 2017. http://repositorio.ufpa.br/jspui/handle/2011/9457.

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Submitted by Carmen Torres (carmensct@globo.com) on 2018-02-09T18:11:30Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_MapeamentoBitsAdaptacao.pdf: 986310 bytes, checksum: 6e1b30f6ca34fc67df43f3141680c73a (MD5)<br>Approved for entry into archive by Edisangela Bastos (edisangela@ufpa.br) on 2018-02-16T16:12:49Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_MapeamentoBitsAdaptacao.pdf: 986310 bytes, checksum: 6e1b30f6ca34fc67df43f3141680c73a (MD5)<br>Made available in DSpace on 2018-0

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16

Wang, Chenxi. "EXIT chart analysis of coded multiple antenna systems /." 2005. http://wwwlib.umi.com/dissertations/fullcit/3189306.

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17

Su, Chia-Wei, and 蘇佳偉. "Research and analysis of EXIT chart for MIMO-OFDM system." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/76657729443945938285.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>98<br>In this thesis, we worked on the architecture of 4G wireless communication systems. Our research was focused on iterative detection and decoding algorithms in MIMO-OFDM systems. Since the popularity of wireless online and wireless communications is increasing, the number of users has also increased. For the finite wireless spectrum, we have to divide wireless spectrum effectively and maximize spectrum efficiency. Then we can generate multiple independent parallel channels and transmit data simultaneously by using the multi-input multi-output (MIMO). Therefore u

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18

Liu, Yi-Chang, and 劉益彰. "On the Design of the BICM-ID Systems with EXIT Chart." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/22440013649520426481.

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碩士<br>國立交通大學<br>電信工程系所<br>94<br>In the bit-interleaved coded modulation systems with iterative decoding (BICM-ID), a good labeling (bit mapping) is one of the key factors that dictate the system performance. In this thesis, Extrinsic Information Transfer (EXIT) chart, a popular tool to analyze the convergence behavior of an iterative decoding system, is employed for the labeling design. By changing the slopes of the detector transfer curves and selecting the most suitable labeling for the outer code, we show that the system performance can be significantly improved. In addition, EXIT chart is

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19

Su, Jing-Fang, and 蘇敬方. "The Implementation of Exit Chart with Log-MAP Algorithm in Turbo Decoding." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/05108357626229536157.

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碩士<br>國立中正大學<br>通訊工程研究所<br>95<br>In nowadays, Turbo codes have already been widely applied to many wireless communication systems and yield a remarkable performance approaching Shannon Limit. The turbo encoder consists of two or more traditional convolutional encoders that are connected in parallel or in cascade and then sends out the codeword. Decoding of the received coded messages is based on BCJR algorithm published in 1974. Later on, a log-MAP algorithm derived from BCJR algorithm is published to simplify the decoding computation such that the decoding procedure becomes faster and easier

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20

Lee, Yao-Nan, and 李曜男. "Design and Analysis of Wireless Systems with Factor Graph and EXIT Chart." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/00866603033792064443.

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博士<br>國立清華大學<br>通訊工程研究所<br>96<br>To satisfy the demand for ubiquitously accessing multimedia data services, researchers have been continuing to develop various techniques which aim at pushing the overall system throughput to its limit. From the literature, research challenges towards this end include the developments of 1) an efficient space-time encoding and modulation scheme to raise the transmission rate, 2) a practical iterative receiver to recover the corrupted transmit-signals, and 3) a brand-new network architecture with an efficient scheduling algorithm to exploit the possible reuse of

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21

Wang, Chu-Yan, and 王楚硯. "EXIT-Chart Based Labeling Design for Bit-interleaved Coded Modulation with Iterative Decoding." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/r3sgr6.

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碩士<br>國立交通大學<br>電信工程系所<br>95<br>In this thesis, constellation labeling is jointly designed with the outer code by using an EXIT-chart based analysis to improve the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID). A systematic design method is proposed to obtain a set of labelings with good EXIT-chart characteristics for the regular one-dimensional (complex) modulation. Given an outer code, the best matched labeling can be employed to improve the BER performance. Furthermore, the method is extended to the multi-dimensional modulation case, where a group of bits

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22

Chen, Kuo-Sheng, and 陳國勝. "EXIT chart analysis of bit interleaving binary code in FFH/MFSK systems under multitone jamming." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7zn55d.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>102<br>In this paper, we focus on FFH/MFSK communication systems. After adding multitone jamming and passing through the channel, we compare the performance in different error correcting codes. In our system, the channel we used are Additional White Gaussian Noise channel and Rayleigh selective fading channel. In the use of error correcting codes, we select using convolutional codes and turbo codes. And the decoder is iterative decoding. In order to compare with the performance of different encoder and decoder, so our performance analysis is use the method named E

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23

Shepherd, David Peter. "Optimisation of Iterative Multi-user Receivers using Analytical Tools." Phd thesis, 2008. http://hdl.handle.net/1885/49357.

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The objective of this thesis is to develop tools for the analysis and optimization of an iterative receiver. These tools can be applied to most soft-in soft-out (SISO) receiver components. For illustration purposes we consider a multi-user DS-CDMA system with forward error correction that employs iterative multi-user detection based on soft interference cancellation and single user decoding. Optimized power levels combined with adaptive scheduling allows for efficient utilization of receiver resources for heavily loaded systems.¶ Metric transfer analysis has been shown to be an accurate method

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24

Zhang, Zeyang. "Coarsely quantized Massive MU-MIMO uplink with iterative decision feedback receiver." Thesis, 2020. http://hdl.handle.net/1828/11719.

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Massive MU-MIMO (Multiuser-Multiple Input and Multple Output) is a promising technology for 5G wireless communications because of its spectrum and energy efficiency. To combat the distortion from multipath fading channel, the acquisition of channel state information is essential, which generally requires the training signal that lowers the data rate. In addition, coarse quantization can reduce the high computational energy and cost, yet results in the loss of information. In this thesis, an iterative decision feedback receiver, including iterative Channel Estimation (CE) and equalization, i

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25

Wan, Ping. "Channel estimation for OFDM in fast fading channels." Thesis, 2011. http://hdl.handle.net/1828/3413.

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The increasing demand for high data rate transmission over broadband radio channels has imposed significant challenges in wireless communications. Accurate channel estimation has a major impact on the whole system performance. Specifically, reliable estimate of the channel state information (CSI) is more challenging for orthogonal frequency division multiplexing (OFDM) systems in doubly selective fading channels than for the slower fading channels over which OFDM has been deployed traditionally. With the help of a basis expansion model (BEM), a novel multivariate autoregressive (AR) pr

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26

Brown, Raymond. "Design of low-density parity-check Codes for multiple-input multiple-output wireless systems." Thesis, 2009. http://hdl.handle.net/1959.13/41187.

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Masters Research - Masters of Engineering<br>Mobile telephony, wireless networks and wireless telemetry systems have gone from simple single-input single-output wireless architectures with low data transmission rates to complex systems employing multiple antennas and forward error correction algorithms capable of high data transmission rates over wireless channels. Claude Shannon provided the fundamental capacity limits for a communications system and it can be shown that the capacity for a single-input single-output systems is limited in it’s capability to provide for modern wireless applicat

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27

Brown, Raymond. "Design of low-density parity-check Codes for multiple-input multiple-output wireless systems." 2009. http://hdl.handle.net/1959.13/41187.

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Masters Research - Masters of Engineering<br>Mobile telephony, wireless networks and wireless telemetry systems have gone from simple single-input single-output wireless architectures with low data transmission rates to complex systems employing multiple antennas and forward error correction algorithms capable of high data transmission rates over wireless channels. Claude Shannon provided the fundamental capacity limits for a communications system and it can be shown that the capacity for a single-input single-output systems is limited in it’s capability to provide for modern wireless applicat

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28

Jeřábková, Kamila. "Česká folková scéna a politická persekuce po roce 1977." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-370782.

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Thesis Czech folk scene and political persecution after 1977, deals with the events in Czechoslovakia folk music scene after the release of Charter 77. Thesis is focused on members of the folk group Šafrán (Saffron). Studied period of time is placed between 1977 and the first half of the 80s in Czechoslovakia. Thesis is divided into two parts. Introduction of the thesis and its first part is dedicated to the political and cultural situation of the 70s of the 20th century. The second part of the thesis describes the origin and development of folk music as an independent musical genre in Czechos

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29

Deutschová, Kristýna. "Komparace pohledu exilového tisku na události v Československu na příkladu Národní politiky a Českého slova." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-373021.

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The diploma thesis Comparison of the Exile Press's View of Events in Czechoslovakia Using Národní politika and České slovo As Examples analyses the content of exile periodicals relating to the events in Czechoslovakia from the late 1960s until 1989. The analysis focuses on four events which can be seen as key moments in the period in question. The first event covered in the work is the Prague Spring, commencing with the first flashes of change to the occupation by the Warsaw Pact forces and its consequences. The analysis then explores the Helsinki Conference and the related civil initiative of

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