Quadrature Spatial Modulation Performance Analysis Over Rician Fading Channels
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Multi-Antenna Non-Line-Of-Sight Identification Techniques for Target Localization in Mobile Ad-Hoc Networks
Michigan Technological University Digital Commons @ Michigan Tech Dissertations, Master's Theses and Master's Dissertations, Master's Theses and Master's Reports - Open Reports 2011 Multi-antenna non-line-of-sight identification techniques for target localization in mobile ad-hoc networks Wenjie Xu Michigan Technological University Follow this and additional works at: https://digitalcommons.mtu.edu/etds Part of the Electrical and Computer Engineering Commons Copyright 2011 Wenjie Xu Recommended Citation Xu, Wenjie, "Multi-antenna non-line-of-sight identification techniques for target localization in mobile ad- hoc networks", Dissertation, Michigan Technological University, 2011. https://doi.org/10.37099/mtu.dc.etds/58 Follow this and additional works at: https://digitalcommons.mtu.edu/etds Part of the Electrical and Computer Engineering Commons MULTI-ANTENNA NON-LINE-OF-SIGHT IDENTIFICATION TECHNIQUES FOR TARGET LOCALIZATION IN MOBILE AD-HOC NETWORKS By Wenjie Xu A DISSERTATION Submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY (Electrical Engineering) MICHIGAN TECHNOLOGICAL UNIVERSITY 2011 c 2011 Wenjie Xu This dissertation, "Multi-Antenna Non-Line-Of-Sight Identification Techniques for Target Localization in Mobile Ad-hoc Networks," is hereby approved in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN THE FIELD OF ELEC- TRICAL ENGINEERING. Department of Electrical and Computer Engineering Signatures: Dissertation Advisor Dr. Seyed A. (Reza) Zekavat Committee Member Dr. Daniel R. Fuhrmann Committee Member Dr. Zhi (Gerry) Tian Committee Member Dr. Vladimir D. Tonchev Department Chair Dr. Daniel R. Fuhrmann Date Contents List of Figures ..................................... vii List of Tables ...................................... xi Acknowledgments ...................................xiii Abstract ........................................ xv 1 Introduction ................................... -
Ber Performance of Golden Coded Mimo-Ofdm System Over Rayleigh and Rician Fading Channels
BER PERFORMANCE OF GOLDEN CODED MIMO-OFDM SYSTEM OVER RAYLEIGH AND RICIAN FADING CHANNELS A Vamsi Krishna G Dhruva Department of ECE, LNMIIT Department of ECE, LNMIIT Jaipur-303012, India Jaipur-303012, India [email protected] [email protected] V Sai Krishna V Sinha Department of ECE, LNMIIT Fellow IEEE, Department of ECE, LNMIIT Jaipur-303012, India Jaipur-303012, India [email protected] [email protected] Abstract— In this paper, we analyze the Bit Error Rate (BER) Interference (ICI) and ensures efficient utilization of performance of Golden coded Multiple-Input Multiple-Output bandwidth. The MIMO-OFDM has a great potential to meet Orthogonal Frequency Division Multiplexing (MIMO-OFDM) up the stringent requirement for boosting up the transmit system over Rician multipath fading channel. We also compare diversity and mitigation of the detrimental effects due to the performance of the MIMO-OFDM system using Golden code frequency selective fading [5]. in Rayleigh and Rician multipath fading channels. We discuss the effects of the presence of line-of-sight (LoS) component in the Designing Space-Time Block Codes (STBC) for frequency multipath fading environment which renders the improvement in selective MIMO channels is well motivated by broadband the overall performance of the Golden coded MIMO-OFDM. applications, where multi-antenna systems have to deliver This paper discusses the performance of Golden codes in a multimedia information content at high data rates[6]. frequency selective Rician fading channel. To deal with the Furthermore, STBC are used to improve MIMO performances frequency selective fading channel, we use the OFDM by providing a temporal and spatial multiplexing modulation (Orthogonal Frequency Division Multiplexing) modulation. -
The Role of Correlation in the Performance of Massive MIMO Systems
Article The Role of Correlation in the Performance of Massive MIMO Systems Marwah Abdulrazzaq Naser 1, Mustafa Ismael Salman 2,* and Muntadher Alsabah 3 1 Department of Architectural Engineering, University of Baghdad, Al-Jadriya, Baghdad 10071, Iraq; [email protected] 2 Department of Computer Engineering, University of Baghdad, Al-Jadriya, Baghdad 10071, Iraq 3 Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 4ET, UK; [email protected] * Correspondence: [email protected] Abstract: Massive multiple-input multiple-output (m-MIMO) is considered as an essential technique to meet the high data rate requirements of future sixth generation (6G) wireless communications networks. The vast majority of m-MIMO research has assumed that the channels are uncorrelated. However, this assumption seems highly idealistic. Therefore, this study investigates the m-MIMO performance when the channels are correlated and the base station employs different antenna array topologies, namely the uniform linear array (ULA) and uniform rectangular array (URA). In addition, this study develops analyses of the mean square error (MSE) and the regularized zero-forcing (RZF) precoder under imperfect channel state information (CSI) and a realistic physical channel model. To this end, the MSE minimization and the spectral efficiency (SE) maximization are investigated. The results show that the SE is significantly degraded using the URA topology even when the RZF precoder is used. This is because the level of interference is significantly increased in the highly correlated channels even though the MSE is considerably minimized. This implies that using a URA topology with relatively high channel correlations would not be beneficial to the SE unless an Citation: Naser, M.A.; Salman, M.I.; interference management scheme is exploited. -
Analysis of Space–Time Coding in Correlated Fading Channels Ahmadreza Hedayat, Student Member, IEEE, Harsh Shah, and Aria Nosratinia, Senior Member, IEEE
2882 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 6, NOVEMBER 2005 Analysis of Space–Time Coding in Correlated Fading Channels Ahmadreza Hedayat, Student Member, IEEE, Harsh Shah, and Aria Nosratinia, Senior Member, IEEE Abstract—Antenna spacing and the properties of a scattering ces. Their analysis yields expressions that are equivalent to, environment can create correlation between channel coefficients. but different from, the ones we provide in this paper in the Temporal correlation between fading coefficients may also be special case of the quasi-static channel. In another work [7], present, because one may be unable or unwilling to fully interleave the channel symbols. This paper presents a comprehensive analy- Bölcskei et al. studied the performance of space–frequency sis of multiple-input multiple-output systems under correlated coded MIMO-orthogonal frequency-division multiplexing fading. We calculate pairwise-error-probability (PEP) expressions (OFDM) for frequency-selective Rician channels. Uysal and under quasi-static fading, fast fading, block fading, as well as ar- Georghiades [8] derived PEP expressions for transmit-antenna bitrarily temporally correlated fading, under Rayleigh and Rician correlation (with no receive correlation or temporal correla- conditions. We use the PEP expressions to calculate union bounds on the performance of trellis space–time codes, super orthogonal tion). Dogandzic´ [9] gives PEP expressions with spatial cor- space–time codes, linear-dispersion codes, and diagonal algebraic relation, but does not consider temporal correlation. space–time codes. This work augments the existing literature in the following Index Terms—Correlated channels, diversity, fading channels, ways. First, instead of focusing on Chernoff bounds, we de- MIMO signaling, pairwise error probability, space–time codes, rive exact expressions in a relatively straightforward manner. -
On the Impact of Spatial Correlation and Precoder Design on the Performance of MIMO Systems with Space-Time Coding
On the Impact of Spatial Correlation and Precoder Design on the Performance of MIMO Systems with Space-Time Coding Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) April 19 - 24, Taipei, Taiwan, 2009 c 2009 IEEE. Published in the IEEE 2009 International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), scheduled for April 19 - 24, 2009 in Taipei, Taiwan. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works, must be obtained from the IEEE. Contact: Manager, Copyrights and Permissions / IEEE Service Center / 445 Hoes Lane / P.O. Box 1331 / Piscataway, NJ 08855-1331, USA. Telephone: + Intl. 908-562-3966. EMIL BJORNSON,¨ BJORN¨ OTTERSTEN, AND EDUARD JORSWIECK Stockholm 2009 KTH Royal Institute of Technology ACCESS Linnaeus Center Signal Processing Lab IR-EE-SB 2009:002, Revised version with minor corrections ON THE IMPACT OF SPATIAL CORRELATION AND PRECODER DESIGN ON THE PERFORMANCE OF MIMO SYSTEMS WITH SPACE-TIME CODING Emil Bjornson,¨ Bjorn¨ Ottersten Eduard Jorswieck ACCESS Linnaeus Center Chair of Communication Theory Signal Processing Lab Communications Laboratory Royal Institute of Technology (KTH) Dresden University of Technology {emil.bjornson,bjorn.ottersten}@ee.kth.se [email protected] ABSTRACT In this paper, we consider the SER performance of spatially cor- related multiple-input multiple-output (MIMO) systems with OST- The symbol error performance of spatially correlated multi-antenna BCs. -
Training Signal Design for Estimation of Correlated MIMO Channels with Colored Interference
Training Signal Design for Estimation of Correlated MIMO Channels with Colored Interference Yong Liu †, Tan F. Wong ∗†, and William. W. Hager ‡ † Wireless Information Networking Group Department of Electrical & Computer Engineering University of Florida, Gainesville, Florida 32611-6130 Phone: 352-392-2665, Fax: 352-392-0044 [email protected], [email protected] ‡ Department of Mathematics University of Florida, Gainesville, Florida 32611-8105 Phone: 352-392-0281, Fax: 352-392-8357 [email protected] EDICS: MSP-CEST, SPC-APPL Abstract In this paper, we study the problem of estimating correlated multiple-input multiple-output (MIMO) channels in the presence of colored interference. The linear minimum mean square error (MMSE) channel estimator is derived and the optimal training sequences are designed based on the MSE of channel estimation. We propose an algorithm to estimate the long-term channel statistics in the construction of the optimal training sequences. We also design an efficient scheme to feed back the required information to the transmitter where we can approximately construct the optimal sequences. Numerical results show that the optimal training sequences provide substantial performance gain for channel estimation when compared with other training sequences. Index Terms MIMO system, channel estimation, optimal training sequence, MSE This work was supported by the National Science Foundation under Grants 0203270 and ANI-0020287. 2 I. INTRODUCTION Many multiple antenna communication systems are designed to perform coherent detection that requires channel state information (CSI) in the demodulation process. For practical wireless communication systems, it is common that the channel parameters are estimated by sending known training symbols to the receiver. -
Performance Comparison of Rayleigh and Rician Fading Channels in QAM Modulation Scheme Using Simulink Environment
International Journal of Computational Engineering Research||Vol, 03||Issue, 5|| Performance Comparison of Rayleigh and Rician Fading Channels In QAM Modulation Scheme Using Simulink Environment P.Sunil Kumar1, Dr.M.G.Sumithra2 and Ms.M.Sarumathi3 1P.G.Scholar, Department of ECE, Bannari Amman Institute of Technology, Sathyamangalam, India 2Professor, Department of ECE, Bannari Amman Institute of Technology, Sathyamangalam, India 3Assistant Professor, Department of ECE, Bannari Amman Institute of Technology, Sathyamangalam, India ABSTRACT: Fading refers to the fluctuations in signal strength when received at the receiver and it is classified into two types as fast fading and slow fading. The multipath propagation of the transmitted signal, which causes fast fading, is because of the three propagation mechanisms described as reflection, diffraction and scattering. The multiple signal paths may sometimes add constructively or sometimes destructively at the receiver, causing a variation in the power level of the received signal. The received signal envelope of a fast-fading signal is said to follow a Rayleigh distribution if there is no line-of-sight between the transmitter and the receiver and a Ricean distribution if one such path is available. The Performance comparison of the Rayleigh and Rician Fading channels in Quadrature Amplitude Modulation using Simulink tool is dealt in this paper. KEYWORDS: Fading, Rayleigh, Rician, QAM, Simulink I. INTRODUCTION TO THE LINE OF SIGHT TRANSMISSION: With any communication system, the signal that is received will differ from the signal that is transmitted, due to various transmission impairments. For analog signals, these impairments introduce random modifications that degrade the signal quality. For digital data, bit errors are introduced, a binary 1 is transformed into a binary 0, and vice versa. -
A Novel Term Weighing Scheme Towards Efficient Crawl of Textual Databases
International Journal of Computer Engineering and Applications, Volume XII, Special Issue, May 18, www.ijcea.com ISSN 2321-3469 DIGITAL AUDIO BROADCASTING UNDER DIFFERENT MODULATION SCHEMES AND CHANNELS Arvind Venkat M 1, Biswajit Singh 2, Sharon William Raj V 3 1Department of Electronics and Communication Engineering, VTU University 2Department of Electronics and Communication Engineering, VTU University 3Department of Electronics and Communication Engineering, VTU University ABSTRACT: Digital audio broadcasting (DAB) is a digital radio standard for broadcasting digital audio radio services, used in countries across Europe, the Middle East and Asia Pacific. The DAB standard was initiated as a European research project in the 1980s. DAB is more efficient in its use of spectrum than analogue FM radio, and thus offer more radio services for the same given bandwidth. DAB is more robust with regard to noise and multipath fading for mobile listening, since DAB reception quality first degrades rapidly when the signal strength falls below a critical threshold, whereas FM reception quality degrades slowly with the decreasing signal. DAB uses a wide-bandwidth broadcast technology and typically spectra have been allocated for it in Band III (174–240 MHz) and L band (1.452–1.492 GHz), although the scheme allows for operation between 30 and 300 MHz In a digital transmission, Bit Error Rate (BER) is the percentage of bits with errors divided by the total number of bits that have been transmitted, received or processed over a given period of time. The rate is typically expressed as 10 to the negative power. The main purpose is to calculate and compare Bit Error Rate of Digital Audio Broadcast under different channels using QPSK, BPSK modulation schemes for different modes of DAB. -
Performance of Cell-Free Massive MIMO with Rician Fading and Phase Shifts
1 Performance of Cell-Free Massive MIMO with Rician Fading and Phase Shifts Özgecan Özdogan, Student Member, IEEE, Emil Björnson, Senior Member, IEEE, and Jiayi Zhang, Member, IEEE Abstract—In this paper, we study the uplink (UL) and down- In its canonical form, cell-free massive MIMO uses MR link (DL) spectral efficiency (SE) of a cell-free massive multiple- combining because of its low complexity. Due to the fact that input-multiple-output (MIMO) system over Rician fading chan- MR combining cannot suppress the interference well, some nels. The phase of the line-of-sight (LoS) path is modeled as a uniformly distributed random variable to take the phase-shifts APs receive more interference from other UEs than signal due to mobility and phase noise into account. Considering the power from the desired UE. The LSFD method is proposed in availability of prior information at the access points (APs), the [7] and [8] to mitigate the interference for co-located massive phase-aware minimum mean square error (MMSE), non-aware MIMO systems. This method is generalized for more realistic linear MMSE (LMMSE), and least-square (LS) estimators are spatially correlated Rayleigh fading channels with arbitrary derived. The MMSE estimator requires perfectly estimated phase knowledge whereas the LMMSE and LS are derived without it. first-layer decoders in [9], [10]. The two-layer decoding tech- In the UL, a two-layer decoding method is investigated in order nique is first adapted to cell-free massive MIMO networks in to mitigate both coherent and non-coherent interference. Closed- [11] for a Rayleigh fading scenario. -
Simulation Model for a Frequency-Selective Land Mobile Satellite Communication Channel
CORE Metadata, citation and similar papers at core.ac.uk Provided by International Institute for Science, Technology and Education (IISTE): E-Journals Innovative Systems Design and Engineering www.iiste.org ISSN 2222-1727 (Paper) ISSN 2222-2871 (Online) Vol 3, No.11, 2012 Simulation Model for a Frequency-Selective Land Mobile Satellite Communication Channel Zachaeus K. Adeyemo 1, Olumide O. Ajayi 2* , Festus K. Ojo 3 1. Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, PMB 4000, Ogbomoso, Nigeria 2. Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, PMB 4000, Ogbomoso, Nigeria 3. Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology, PMB 4000, Ogbomoso, Nigeria *E-mail of corresponding author: [email protected] Abstract This paper investigates a three-state simulation model for a frequency-selective land mobile satellite communication (LMSC) channel. Aside from ionospheric effects, the propagation channels for LMSC systems are also characterized by wideband effects due to multipath fading which makes the channels time-variant and exhibit frequency-selective distortion. Hence, an adequate knowledge and modelling of the propagation channel is necessary for the design and performance evaluation of the LMSC systems. A three-state simulation model for a frequency-selective LMSC channel, which is a combination of Rayleigh, Rician and Loo fading processes, is developed. The propagation characteristics of the proposed -
Effect of AWGN & Fading (Raleigh & Rician) Channels on BER Performance of a Wimax Communication System
(IJCSIS) International Journal of Computer Science and Information Security, Vol. 10, No. 8, August 2012 Effect of AWGN & Fading (Raleigh & Rician) channels on BER performance of a WiMAX communication System Nuzhat Tasneem Awon Md. Mizanur Rahman Dept. of Information & Communication Engineering Dept. of Information & Communication Engineering University of Rajshahi, Rajshahi, Bangladesh University of Rajshahi, Rajshahi, Bangladesh e-mail: [email protected] e-mail: [email protected] Md. Ashraful Islam A.Z.M. Touhidul Islam Lecturer Associate Professor Dept. of Information & Communication Engineering Dept. of Information & Communication Engineering University of Rajshahi, Rajshahi, Bangladesh University of Rajshahi, Rajshahi, Bangladesh e-mail: [email protected] e-mail: [email protected] Abstract— The emergence of WIMAX has attracted significant into two types; Fixed Wireless Broadband and Mobile interests from all fields of wireless communications including Broadband. The fixed wireless broadband provides services students, researchers, system engineers and operators. The that are similar to the services offered by the fixed line WIMAX can also be considered to be the main technology in the broadband. But wireless medium is used for fixed wireless implementation of other networks like wireless sensor networks. broadband and that is their only difference. The mobile Developing an understanding of the WIMAX system can be broadband offers broadband services with an addition namely achieved by looking at the model of the WIMAX -
OFDM Comparison with FFT and DWT Processing for DVB-T2 Wireless Channels Comparación OFDM Con Procesado FFT Y DWT Para Canales Inalámbricos DVB-T2
Paz-Penagos / INGE CUC, vol. 14 no. 2, pp. 97-105, Julio - Diciembre, 2018 OFDM comparison with FFT and DWT processing for DVB-T2 wireless channels Comparación OFDM con procesado FFT y DWT para canales inalámbricos DVB-T2. DOI: https://doi.org/10.17981/ingecuc.14.2.2018.09 Artículo de Investigación. Fecha de Recepción:16/06/2018. Fecha de Aceptación: 17/12/2018. Hernán Paz-Penagos Escuela Colombiana de Ingeniería Julio Garavito. Bogotá, (Colombia) [email protected] To cite this paper: H. Paz Penagos, “OFDM comparison with FFT and DWT processing for DVB-T2 wireless channels” INGE CUC, vol. 14, no. 2, pp. 97-105, 2018. DOI: http://doi.org/10.17981/ingecuc.14.2.2018.09 Abstract Resumen Introduction− Recent studies on the FFT processing Introducción− Recientes estudios sobre el procesado (Fast Fourier Transform) or DWT (Discrete Wavelet FFT (Fast Fourier Transform) o DWT (Discrete Wavelet Transform) of the OFDM signal (Orthogonal Frequency Transform) de la señal OFDM (Orthogonal Frequency Di- Division Multiplexing) have shown pros and cons for vision Multiplexing) han demostrado pros y contras para DVB-T2 (Digital Video Broadcasting-Second Generation comunicaciones de radio DVB-T2 (Digital Video Broad- Terrestrial) radio communications; however, the benefits casting – Second Generation Terrestrial); sin embargo, aún falta comparar las prestaciones de ambos tipos de of both types of processing have yet to be compared for procesamiento para el mismo escenario. the same scenario. Objetivo− El objetivo de esta investigación es comparar Objective− The objective of this research is to compare la respuesta del canal inalámbrico con ruido AWGN (Ad- the response of the wireless channel with AWGN noise ditive White Gaussian Noise Channel) y desvanecimiento (Additive White Gaussian Noise Channel) and Rayleigh Rayleigh y Rician en la banda de UHF (Ultra High Fre- and Rician fading in the UHF (Ultra High Frequency) quency).