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About this Item: Condition: New. Seller Inventory # 29395059-n

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Jianjun Ran

Published by Cuvillier Verlag (2008)

ISBN 10: 3867276498 ISBN 13: 9783867276498

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About this Item: Cuvillier Verlag, 2008. Condition: New. Seller Inventory # L9783867276498

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Rainer Grünheid

Published by Cuvillier Verlag (2007)

ISBN 10: 386727410X ISBN 13: 9783867274104

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About this Item: Cuvillier Verlag, 2007. Condition: New. Seller Inventory # L9783867274104

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Ran, Jianjun

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ISBN 10: 3867276498 ISBN 13: 9783867276498

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About this Item: Cuvillier Verlag. paperback. Condition: New. Seller Inventory # 9783867276498

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Ran, Jianjun

Published by Cuvillier Verlag (2008)

ISBN 10: 3867276498 ISBN 13: 9783867276498

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About this Item: Cuvillier Verlag, 2008. Paperback. Condition: Brand New. 8.31x5.87x0.59 inches. In Stock. Seller Inventory # __3867276498

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Dridi-B

Published by Univ Europeenne, United States (2011)

ISBN 10: 6131596654 ISBN 13: 9786131596650

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About this Item: Univ Europeenne, United States, 2011. Paperback. Condition: New. Aufl.. Language: French . This book usually ship within 10-15 business days and we will endeavor to dispatch orders quicker than this where possible. Brand New Book. Les systemes multi antennes MIMO, et notamment les systemes bases sur le multiplexage spatial, telle l architecture BLAST doivent cependant respecter bon nombre de contraintes, dont la bande etroite reste la principale. Afin de surmonter ce handicap et d etendre les possibilites de BLAST, nous avons etudie l association avec la modulation OFDM. Cette modulation multi porteuses permet en effet de diviser une grande bande de frequence en de multiples sous bandes contigues et orthogonales entre elles, evitant ainsi l interference entre symboles et autorisant l utilisation de l algorithme BLAST initial dans chaque sous-porteuse. L architecture d un tel systeme est largement detaillee, et pour valider le procede, des simulations sont realises sous le logiciel ADS. L association MIMO-OFDM devrait plaire a nombre d industriels, qui pourraient y voir entre autre le moyen de supplanter les technologies d acces multiples actuelles, essentiellement basees sur le CDMA. Seller Inventory # OMN9786131596650

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Jianjun Ran

Published by Cuvillier Verlag Jul 2008 (2008)

ISBN 10: 3867276498 ISBN 13: 9783867276498

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About this Item: Cuvillier Verlag Jul 2008, 2008. Taschenbuch. Condition: Neu. Neuware - The emerging wireless communication systems, such as cellular communications systems and wireless net-works, are changing the life style nowadays dramatically. The prospect of modern wireless communication systems is very attractive by declaring the ability of ubiquitous access to information with high-quality and high-speed service. The Orthogonal Frequency Division Multiplexing (OFDM) technique is one promising candidate for the $4^{th}$ generation wireless systems, due to its merits of high flexibility and low equalization complexity for wideband wireless communication applications. To further enhance the communication system capacity and reliability, multiple antenna techniques can be integrated into OFDM systems. As a preliminary step, the physical characteristics of wideband radio channels and the channel modeling issue are addressed. The channel capacity with multiple antennas is presented by considering both cases of ideal and practical estimated channel state information (CSI) in the system. The fundamentals of the OFDM transmission technique are introduced. With the OFDM transmission structu-re the frequency-selective wideband radio channel is decomposed into a set of parallel subcarriers, and each subcarrier can be treated as a flat-fading narrowband channel. Several Multiple-Input-Multiple-Output (MIMO) technologies are discussed, in the scope of subcarrier-based MIMO encoding and decoding within the MIMO-OFDM transceiver structure, i. e. integrate the MIMO signal processing algorithms into a wideband OFDM system, where each OFDM subcarrier is regarded individually as a narrowband flat-fading subsystem with the Discrete Fourier Transform (DFT) and Inverse Discrete Fou-rier Transform (IDFT). The simulation results and analysis are presented under various radio channel condi-tions with ideal CSI. For practical reasons, channel estimation is necessary for coherent-detection MIMO-OFDM systems. The Pilot-based Channel Estimation (PBCE) schemes are implemented to evaluate the system performance with the realistically estimated CSI. With estimated CSI for MIMO encoding/decoding and data symbol detection, the system performance is reasonably degraded. The system performance results with estimated CSI are presented, and the impact of channel estimation errors is analyzed. In order to ensure a reliable and flexible data transmission in MIMO-OFDM systems, the indicator-based link adaptation procedure is employed to optimize the system throughput by selecting a proper Transmission Mode (TM) according to the instantaneous channel conditions. The Transmission Mode Selection (TMS) procedure with two-dimensional (2D) indicators is developed. A set of indicator candidates and their appro-ximation functions are proposed. With the indicator simulation results and the proposed TMS procedure for MIMO-OFDM systems, the average system throughput results are illustrated for both the conventional link adaptation method and the proposed 2D indicator-based TMS approach. Finally, the general system performance results of MIMO-OFDM systems are summarized. Arguments and suggestions are further made on how to design a MIMO-OFDM system in various wideband wireless com-munication applications. 162 pp. Englisch. Seller Inventory # 9783867276498

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RUI LI

Published by VDM Verlag (2009)

ISBN 10: 3639212746 ISBN 13: 9783639212747

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About this Item: VDM Verlag, 2009. Condition: New. book. Seller Inventory # M3639212746

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Patteti Krishna, Kalitkar Kishan Rao, Tipparti Anil Kumar

Published by LAP Lambert Academic Publishing (2017)

ISBN 10: 6202022523 ISBN 13: 9786202022521

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About this Item: LAP Lambert Academic Publishing, 2017. Paperback. Condition: New. Aufl.. Language: English . This book usually ship within 10-15 business days and we will endeavor to dispatch orders quicker than this where possible. Brand New Book. Much higher area data throughput is required in future cellular networks, since the global demand for wireless data traffic is continuously growing. This goal can be achieved without the need for more bandwidth or additional base stations (BS) if the spectral efficiency (SE) bit/s/Hz is improved. This text book explains the importance of improving the SE analysis in MU-MIMO LTE cellular systems and why the multiuser MIMO communication technology, where multi-antenna BSs spatially multiplex a multitude of user terminals (UTs) over the entire bandwidth, is well-suited for this purpose. In this book, the system performance metric such as throughput, spectrum efficiency and scheduling for enhancements of MU MIMO LTE systems was studied and analyzed. Further, these performances were studied under different channel conditions, capacity analysis; transmit diversity, spatial multiplexing and sum rate calculation used to enhance the performance of LTE systems. Seller Inventory # OMN9786202022521

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Thavalapill Smith

Published by LAP Lambert Academic Publishing (2016)

ISBN 10: 3659748870 ISBN 13: 9783659748875

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About this Item: LAP Lambert Academic Publishing, 2016. Paperback. Condition: New. PRINT ON DEMAND Book; New; Publication Year 2016; Not Signed; Fast Shipping from the UK. No. book. Seller Inventory # ria9783659748875_lsuk

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Grünheid, Rainer

Published by Cuvillier Verlag (2007)

ISBN 10: 386727410X ISBN 13: 9783867274104

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About this Item: Cuvillier Verlag, 2007. Paperback. Condition: Brand New. 8.27x5.87x0.47 inches. In Stock. Seller Inventory # __386727410X

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Dridi-B

Published by Univ Europeenne, United States (2011)

ISBN 10: 6131596654 ISBN 13: 9786131596650

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About this Item: Univ Europeenne, United States, 2011. Paperback. Condition: New. Aufl.. Language: French . Brand New Book. Les systemes multi antennes MIMO, et notamment les systemes bases sur le multiplexage spatial, telle l architecture BLAST doivent cependant respecter bon nombre de contraintes, dont la bande etroite reste la principale. Afin de surmonter ce handicap et d etendre les possibilites de BLAST, nous avons etudie l association avec la modulation OFDM. Cette modulation multi porteuses permet en effet de diviser une grande bande de frequence en de multiples sous bandes contigues et orthogonales entre elles, evitant ainsi l interference entre symboles et autorisant l utilisation de l algorithme BLAST initial dans chaque sous-porteuse. L architecture d un tel systeme est largement detaillee, et pour valider le procede, des simulations sont realises sous le logiciel ADS. L association MIMO-OFDM devrait plaire a nombre d industriels, qui pourraient y voir entre autre le moyen de supplanter les technologies d acces multiples actuelles, essentiellement basees sur le CDMA. Seller Inventory # KNV9786131596650

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Yuvraj Singh Ranawat, Mahendra Kumar

Published by LAP Lambert Academic Publishing (2017)

ISBN 10: 6202054042 ISBN 13: 9786202054041

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About this Item: LAP Lambert Academic Publishing, 2017. Paperback. Condition: New. Language: English . Brand New Book. In this book, we analyzed the performance of DFT spread OFDM method for reducing the PAPR in MIMO-OFDM. The simulation results shows IFDMA method is best among the OFDMA, LFDMA and IFDMA. But the disadvantage of IFDMA scheme is that we are losing user diversity and investigates one of the bottleneck problems that exist in MIMO-OFDM wireless communication system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective algorithms. First part begins with the review of PAPR reduction techniques like clipping and filtering, selected mapping (SLM), partial transmit sequence (PTS) and DFT Spreading. Their capabilities and drawbacks are compared on the basis of simulation results obtained. We are mainly focusing on the signal scrambling technology, and discuss it by observing the MATLAB simulation results. In the signal scrambling technology, we study the method of selected mapping and partial transmit sequence. Seller Inventory # KNV9786202054041

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Hassan, Muhammad / Sattar, Abdul

ISBN 10: 3330329777 ISBN 13: 9783330329775

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | The demand of different multimedia services and different internet supported applications on mobile devices requires a high speed data rate and good service of quality. This can be obtained by implementing multiple Antenna technology on both stations i.e. User terminal and base station with an appropriate coding technique, and on the other hand MIMO can fulfill 3G & 4G demand and standard with a combination of other techniques. The system's error performance is analyzed through simulation which showed the simulated results of Multi-Rate Resource Control (MRRC) scheme and Alamouti scheme are identical. And also the Bit Error Rate (BER) were checked for different MIMO systems. By improving the BER, we will get the better QoS. | Format: Paperback | Language/Sprache: english | 76 pp. Seller Inventory # K9783330329775

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Benslama, Malek / Krouma, Houda

ISBN 10: 3659705748 ISBN 13: 9783659705748

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | The need for wireless connections with different systems and devices has been growing spectacularly in the past several years. In particular, there is a need to access high speed wireless internet to exchange media such as photos, music and video. Mobile Communication Systems are often categorized as different generations depending on the services offered. The first generation comprises the analog frequency division multiple access (FDMA) systems such as the NMT and AMPS (Advanced Mobile Phone Services) | Format: Paperback | Language/Sprache: english | 80 pp. Seller Inventory # K9783659705748

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Thavalapill, Smith

ISBN 10: 3659748870 ISBN 13: 9783659748875

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | Recently the integration of the Multiple-Input Multiple-Output (MIMO) architectures and Orthogonal Frequency Division Multiplexing (OFDM) technique has been widely considered as a potential strategy to enhance data rate, capacity and quality of broadband wireless OFDM systems.However, the inherent drawback of OFDM-based systems is their susceptibility to synchronization errors such as the Carrier Frequency Offset (CFO) and the primary challenge in MIMO based systems is the increasing complexity in channel estimation as the number of antennas increases.Various joint CFO and channel estimation for OFDM as well as MIMO-OFDM systems have been proposed till date. In this report, we consider an iterative Expectation-Maximization (EM) algorithm for the joint estimation of CFO and Channel Impulse Response(CIR) for MIMO-OFDM system in frequency selective fading channel.Simulation results show that EM algorithm gives marginally better performance over pilot-assisted Maximum Likelihood (ML)- based algorithm,proposed recently,in terms of MSE of both channel and frequency offset estimators. | Format: Paperback | Language/Sprache: english | 56 pp. Seller Inventory # K9783659748875

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Kokare, Sheetal

ISBN 10: 333000536X ISBN 13: 9783330005365

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | The next generation wireless communication systems offer multimedia and broadband internet services. The purpose of choosing Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) as the research topic is that both technologies are essential parts of advanced wireless communications systems to cater to the needs of high data rate, efficient spectrum utilization and reliable error-free communication. | Format: Paperback | Language/Sprache: english | 72 pp. Seller Inventory # K9783330005365

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Rangasamy, Deepa

ISBN 10: 3659507644 ISBN 13: 9783659507649

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | In any communication system, the emphasis is on estimating the channel response so as to retrieve the transmitted input signal accurately at the receiver s end. Channel Equalisation at the transmitter refers to pre-distorting the input signal so that the effect of the channel is nullified during transmission.By evaluating the inverse of the filter F and passing the symbols through a filter designed with frequency response F-1, we can equalise the distortions on the input due to channel. The proposed method shows a better Bit Error Rate (BER) performance than that of the usual way of channel equalization in the respective systems. | Format: Paperback | Language/Sprache: english | 80 pp. Seller Inventory # K9783659507649

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Mohsin Salim, Gangat / Jubair, Joya

ISBN 10: 3659884707 ISBN 13: 9783659884702

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | Orthogonal frequency-division multiplexing (OFDM) is a popular method for high data- rate wireless transmission. OFDM may be combined with multiple antennas at both the access point and mobile terminal to increase diversity gain and enhance system capacity on a time-varying multipath fading channel, resulting in a MIMO-OFDM system In this book we have studied various method for improving spectral efficiency and link reliability of OFDM system, and also carried out study to the increase the performance of MIMO-OFDM system and to reduce the Peak to Average Power Ratio (PAPR). | Format: Paperback | Language/Sprache: english | 72 pp. Seller Inventory # K9783659884702

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Astawa, I. Gede Puja / Okada, Minoru

ISBN 10: 3659185361 ISBN 13: 9783659185366

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | This book is great to explore issues on wireless communication systems. Related to students, lecturer, or people concerned with the problems of communication system to obtain power consumption saving on multi - antenna systems, especially. Based on a unique antenna design using single radio-frequency (RF) signal processing in the receiver side, the people can get some advantages : low power consumption and hardware size more reduced without reducing the quality of performances from conventional receivers. | Format: Paperback | Language/Sprache: english | 80 pp. Seller Inventory # K9783659185366

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Ranawat, Yuvraj Singh / Kumar, Mahendra

ISBN 10: 6202054042 ISBN 13: 9786202054041

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About this Item: Condition: New. Publisher/Verlag: LAP Lambert Academic Publishing | The Modern Communication Knowledge on MIMO OFDM | In this book, we analyzed the performance of DFT spread OFDM method for reducing the PAPR in MIMO-OFDM. The simulation results shows IFDMA method is best among the OFDMA, LFDMA and IFDMA. But the disadvantage of IFDMA scheme is that we are losing user diversity and investigates one of the bottleneck problems that exist in MIMO-OFDM wireless communication system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective algorithms. First part begins with the review of PAPR reduction techniques like clipping and filtering, selected mapping (SLM), partial transmit sequence (PTS) and DFT Spreading. Their capabilities and drawbacks are compared on the basis of simulation results obtained. We are mainly focusing on the signal scrambling technology, and discuss it by observing the MATLAB simulation results. In the signal scrambling technology, we study the method of selected mapping and partial transmit sequence. | Format: Paperback | Language/Sprache: english | 64 pp. Seller Inventory # K9786202054041

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Jianjun Ran

Published by Cuvillier Verlag (2008)

ISBN 10: 3867276498 ISBN 13: 9783867276498

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About this Item: Cuvillier Verlag, 2008. Paperback. Condition: New. Language: English . Brand New Book. Seller Inventory # LIB9783867276498

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Yuvraj Singh Ranawat, Mahendra Kumar

Published by LAP Lambert Academic Publishing (2017)

ISBN 10: 6202054042 ISBN 13: 9786202054041

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About this Item: LAP Lambert Academic Publishing, 2017. Paperback. Condition: New. Language: English . Brand New Book. In this book, we analyzed the performance of DFT spread OFDM method for reducing the PAPR in MIMO-OFDM. The simulation results shows IFDMA method is best among the OFDMA, LFDMA and IFDMA. But the disadvantage of IFDMA scheme is that we are losing user diversity and investigates one of the bottleneck problems that exist in MIMO-OFDM wireless communication system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective system. High Peak-Average Power Ratio (PAPR of OFDM signal), and discusses how to reduce it by different effective algorithms. First part begins with the review of PAPR reduction techniques like clipping and filtering, selected mapping (SLM), partial transmit sequence (PTS) and DFT Spreading. Their capabilities and drawbacks are compared on the basis of simulation results obtained. We are mainly focusing on the signal scrambling technology, and discuss it by observing the MATLAB simulation results. In the signal scrambling technology, we study the method of selected mapping and partial transmit sequence. Seller Inventory # KNV9786202054041

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Rangasamy Deepa (author)

Published by LAP Lambert Academic Publishing 2014-02-02 (2014)

ISBN 10: 3659507644 ISBN 13: 9783659507649

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About this Item: LAP Lambert Academic Publishing 2014-02-02, 2014. paperback. Condition: New. Seller Inventory # 9783659507649

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Astawa I Gede Puja (author), Okada Minoru (author)

Published by LAP Lambert Academic Publishing 1989-01-01 (1989)

ISBN 10: 3659185361 ISBN 13: 9783659185366

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About this Item: LAP Lambert Academic Publishing 1989-01-01, 1989. paperback. Condition: New. Seller Inventory # 9783659185366

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Rainer Grünheid

Published by Cuvillier Verlag Nov 2007 (2007)

ISBN 10: 386727410X ISBN 13: 9783867274104

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About this Item: Cuvillier Verlag Nov 2007, 2007. Taschenbuch. Condition: Neu. Neuware - In this thesis, novel concepts of an adaptive resource allocation in an OFDM-based cellular network are considered. The approach of self-organised beamforming and opportunistic scheduling (SOBOS) is investigated, where in each cell the resource assignment is carried out autonomously and independently on the basis of SINR measurements. On the physical (PHY) layer, the use of multiple antennas (MIMO) is assumed. As an exten-sion of the original opportunistic beamforming approach, the self-organised beamforming principle is analysed, where well-defined grids of beams (GoBs) are applied to provide cover-age in the cellular network. This technique does not rely on any form of direct channel knowl-edge. Different methods for generating beams and composing the corresponding grids are taken into account. It is shown that by this beamforming technique, a good coverage of the network can be achieved. Using multiple beams in one GoB, the system goodput can be in-creased, leading to a hybrid TDMA/FDMA/SDMA scheme. The self-organised beamforming approach is shown to provide sufficient variations of the channel over time, frequency, and space, so that multiuser diversity can be exploited. The resources (time-frequency blocks) of the OFDM system can be assigned to users when their channel conditions are at their peak. On top of beamforming, different scheduling algorithms are considered for adaptive resource allocation on the DLC layer. Following the approach of cross-layer design, the scheduler is fed with detailed information of the current channel state for each user and each resource. For that purpose, a measurement model is applied which takes all SINR values of the resource to derive a good estimate of the expected channel quality (Packet Error Rate). With the help of this estimate, resource allocation and PHY mode selection can be carried out. The perform-ance of the scheduling algorithms is compared, especially highlighting the trade-off between the different design goals of goodput maximisation and fairness. Extending the idea of the cross-layer design between PHY and DLC layer, scheduling con-cepts which can actively control the use of beam grids are developed and analysed. Also, the use of certain QoS parameters is included. The options to adaptively use pre-defined as well as dedicated beams are proposed. It is shown that such adaptive measures are helpful for non-uniform user distributions and also to fulfil QoS requirements, i.e. by shaping dedicated beams to prioritised users. Finally, some practical considerations are given in terms of appropriate signalling concepts, which are required to feed sufficient channel state information back to the base station in or-der to facilitate the use of adaptive resource allocation. It is shown that a good system per-formance can be maintained while the signalling overhead is kept at an acceptable level. It appears from the analysed algorithms and techniques that the application of a self-organised beamforming, combined with opportunistic scheduling, is a promising new system concept to meet the demands of next generation¿s mobile communication systems in terms of flexibility, adaptivity, and efficient use of resources. 174 pp. Englisch. Seller Inventory # 9783867274104

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Khavand, Hakimeh

Published by Createspace Independent Publishing Platform (2017)

ISBN 10: 1973716569 ISBN 13: 9781973716563

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About this Item: Createspace Independent Publishing Platform, 2017. PAP. Condition: New. New Book. Shipped from US within 10 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000. Seller Inventory # IQ-9781973716563

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Hong-Chuan Yang

Published by Cambridge University Press (2011)

ISBN 10: 0521199255 ISBN 13: 9780521199254

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About this Item: Cambridge University Press, 2011. Hardcover. Condition: Good. 1. Ships with Tracking Number! INTERNATIONAL WORLDWIDE Shipping available. May not contain Access Codes or Supplements. May be ex-library. Shipping & Handling by region. Buy with confidence, excellent customer service!. Seller Inventory # 0521199255q

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Thavalapill, Smith

Published by LAP Lambert Academic Publishing (2015)

ISBN 10: 3659748870 ISBN 13: 9783659748875

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About this Item: LAP Lambert Academic Publishing, 2015. PAP. Condition: New. New Book. Shipped from US within 10 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000. Seller Inventory # IQ-9783659748875

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Dridi-B (author)

Published by Univ Europeenne 2011-09-30 (2011)

ISBN 10: 6131596654 ISBN 13: 9786131596650

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About this Item: Univ Europeenne 2011-09-30, 2011. paperback. Condition: New. Seller Inventory # 9786131596650

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