antennas arrays for broadband indoor wireless communications

... extremely high speed and wide coverage of power distributions for indoor wireless communications However the 10 EURASIP Journal on Wireless Communications and Networking Normalised intensity (dB) −2 ... performance, the proposed system can be used in joint with a high-resolution imaging angle diversity receiver power uniformity of the transmitter has yet to be optimized For high performance wireless ... “Spot diffusing and Fly-Eye receivers for indoor infrared wireless communications, ” in Proceedings of the IEEE International Conference on Selected Topics in Wireless Communication, pp 286–292,...

Ngày tải lên: 21/06/2014, 17:20

... in indoor residential environment,” Wireless Communications and Mobile Computing, vol 5, no 5, pp 503–512, 2005, special issue on Ultrawideband for Wireless Communications [17] T S Rappaport, Wireless ... [8] In the case of [8], the delay spreads for indoor 60 GHz channels range from 15 ns to 45 ns for small rooms and between 30 ns and 70 ns for large indoor environments This also implies that ... has also been used for ultra-wideband indoor propagation [18]) for fitting the data The Weibull probability density function can EURASIP Journal on Wireless Communications and Networking be written...

Ngày tải lên: 22/06/2014, 22:20

... Therefore the symbol length and pulse amplitude are varied according to the information being transmitted A set of DAPPM waveforms is shown in Figure A block of M = log2 (A × L) DAPPM for Indoor Wireless ... r(t)|t=kTc A (12) DAPPM for Indoor Wireless Optical Communications Power penalty = P BER, h(t), N0 , Modulation Scheme , P BER, δ(t), N0 , OOK (13) where the bit error rate for OOK is BEROOK = Q ... /Tb is high 10 EURASIP Journal on Wireless Communications and Networking ZERO-FORCING DECISION-FEEDBACK EQUALIZER FOR DAPPM Although MLSD gives superior performance over a dispersive channel,...

Ngày tải lên: 23/06/2014, 00:20

... 2000, he joined I2R (formerly Centre for Wireless Communications) His research interests include reconfigurable signal processing and architectures for broadband wireless communications and software-defined ... is performed for CP-DS-CDMA Reconfigurable Signal Processing for Wireless Communications 327 Channel Source coding Scrambling Channel coding Interleaving Pilot insertion Modem Tx Burst formation ... systems,” Tech Rep., Centre for Wireless Communications (Now Institute for InfoComm Research), Singapore, Singapore, 2001 [5] Y.-C Liang, “Block-Iterative GDFE (BI-GDFE) for CPCDMA,” in Proc 61st...

Ngày tải lên: 23/06/2014, 00:20

... several algorithms for estimating and compensating these channel impairments in early and recent broadband wireless systems As one of the early solutions to broadband wireless communications, the ... algorithm for slow FH M-ary frequency shift keying (MFSK) systems over quasi-static flat Rayleigh fading channels Recently, considered as a very promising candidate for broadband wireless communications, ... mitigation for slow FH Mary frequency shift keying (MFSK) systems over quasi-static Rayleigh fading channels Recently, considered as a very strong candidate for broadband wireless communications, ...

Ngày tải lên: 13/11/2014, 06:08

... developing wireless modems for peer-to-peer networks CHAPTER INTRODUCTION 1.1 The Need for Improvement in Channel Modeling Theory The theory that engineers use to measure and model wireless communications ... trends in wireless communications which emphasize the need for improved and expanded channel modeling theory 1.1.1 Higher and Higher Data Rates The capacity for data transmission of current wireless ... the older paradigms of wireless channel modeling 1.1.3 Smart Antennas Adaptive arrays and other types of smart antenna techniques are emerging technologies for improving the wireless link and mitigating...

Ngày tải lên: 20/11/2012, 11:36

... efficient, secure, and cost-effective connectivity for RF MEMS Circuit Design for Wireless Communications Information Wireless appliances • Voice • Video • Broadband data ? • Messaging • Navigation • ... Ground Fixed/Mobile Platform The Space Platform 7 1.3 1.3.1 1.3.2 1.3.3 Wireless Standards, Systems, and Architectures Wireless Standards Conceptual Wireless Systems Wireless Transceiver Architectures ... 137 4.4 4.4.1 4.4.2 Reconfigurable Antennas Tunable Dipole Antennas Tunable Microstrip Patch-Array Antennas 139 139 140 x RF MEMS Circuit Design for Wireless Communications 4.5 Summary References...

Ngày tải lên: 19/01/2014, 20:20

... literature, channel modeling information can be found for wireless (radio) communications [Tur72, Suz77], wireline communications (twisted pair) [Fis95], PROBLEMS 27 optical communications over fiber ... the book will be wireless communications examples, specifically radio communications such as cellular communications In such systems, there are several standard models used for the medium response ... linear equalization 4.3.6 Performance results More Math 4.4.1 ZF solution 4.4.2 MMSE solution 4.4.3 ML solution 4.4.4 Other forms for the CDM case 4.4.5 Other forms for the OFDM case 4.4.6 Simpler...

Ngày tải lên: 16/03/2014, 22:20

... space segment antennas, earth-segment antennas, and gateway antennas for satellite communications; microstrip antennas for xed and mobile satellite communications; and mobile antennas for receiving ... characterization and presents beamforming strategies for transmit arrays including beamforming algorithms and robust beamforming methods Chapter 19, Spatial Diversity for Wireless Communications, treats ... line antennas for personal wireless communications Chapters 13 and 14 provide coverage on antenna development for satellite communications; Chapter 13 concentrates on aeronautical and maritime antennas...

Ngày tải lên: 18/04/2014, 11:02

... TDD-CDMA for Wireless Communications For a listing of recent titles in the Artech House Universal Personal Communications Series, turn to the back of this book TDD-CDMA for Wireless Communications ... emergency communications Whereas the wired communications explosion was instantaneous, the wireless revolution did not occur until the 1980s TDD-CDMA for Wireless Communications 1.1 Mobile Communications ... Cox, D C., Wireless Network Access for Personal Communications, ” IEEE Communications Magazine, December 1992, pp 96–115 [5] Adachi, F., Wireless Past and Future—Evolving Mobile Communications...

Ngày tải lên: 27/05/2014, 04:01

... sends it after performing the back-off procedure In parallel, it generates the CRC For frames, for which an acknowledgement is expected, it sets a respective timeout and checks for successful delivery ... Papadias, A-J van der Veen, Space-Time Wireless Systems: From Array Processing to MIMO Communications (Cambridge University Press, Cambridge, 2006) IEEE Standard for Information technology—local and ... models for the GHz OFDM physical layer (PHY), and a detailed model for the MAC layer The model is used to verify the functional correctness of the MAC design and to investigate the performance...

Ngày tải lên: 18/06/2014, 22:20

... performance is also the target of the cognitive controller built using multilayer feed-forward neural network [13] The controller performs this task for different channels in IEEE 802.11 wireless ... Figure 1Error! Reference source not found More information regarding the mathematical formulation and the algorithm for the 15 functionality for dynamically learning user preferences, as well ... etc.) For this purpose, the GA scores a subset of parameters and evolves them until the optimal value is reached for a given goal Furthermore, neural networks (NNs) have also been used for treating...

Ngày tải lên: 20/06/2014, 20:20

... 0.01 W, the performances of all SCFDE schemes are almost the same due to their lower PAPR For an input signal power of W for QPSK and 0.1 W for 16 QAM and 64 QAM, DQO-SCFDE performs better than ... IEEE Global Telecommunications Conference (GLOBECOM ’94), vol 1, pp 1–5, 1994 M V Clark, “Adaptive frequency-domain equalization and diversity combining for broadband wireless communications, ” ... Selected Areas in Communications, vol 16, no 8, pp 1385–1395, 1998 A Gusmao, R Dinis, J Conceicao, and N Esteves, “Comparison of two modulation choices for broadband wireless communications, ”...

Ngày tải lên: 21/06/2014, 08:20

... The performance of the proposed low-complexity algorithm is investigated for OFDM- and FBMC-based CR systems In the sixth paper, “Packet format design and decision directed tracking methods for ... Amini and B Farhang-Boroujeny develop a packet format for FBMC systems together with algorithms for carrier frequency and timing recovery Also methods for channel estimation as well as carrier and ... bursts Good performance for a lowcomplexity approximate ML estimator is demonstrated The eighth paper, “Pilot-based synchronization and equalization in filter bank multicarrier communications ...

Ngày tải lên: 21/06/2014, 16:20

... Ganu, “A system for LEASE: location estimation assisted by stationary emitters for indoor RF wireless networks,” in Proceedings of the Joint Conference of the IEEE Computer and Communications ... practical approach to landmark deployment for indoor localization,” in Proceedings of the 3rd Annual IEEE Communications Society Conference on Sensor and Ad Hoc Communications and Networks (SECON ’06), ... this error is at least as high as the inverse of the Fisher information For analytical details on computing the CRB and the Fisher information see [5] The expression (2) is used to obtain range...

Ngày tải lên: 21/06/2014, 18:20

... and is therefore potentially less robust For the indoor system parameters considered, the performance of the two techniques was nearly identical We therefore present results only for linear interpolation ... of pilot symbols for enabling channel estimation For our purposes, we use the so-called AMC × permutation which is well suited for low-mobility indoor environments (AMC stands for Adaptive Modulation ... Wireless Conference, Paris, France, April 2007 [34] P Almers, E Bonek, A Burr, et al., “Survey of Channel and Radio Propagation Models for WirelessMIMO Systems,” EURASIP Journal on Wireless Communications...

Ngày tải lên: 21/06/2014, 19:20

... matrices and MIMO wireless communication systems The concept of the hub matrix was introduced in the context of wireless communications by Kung and Suter in [9] and it is reexamined here ⎡ for j = 2, ... := d j for j = 1, , m − 1; if ρdm > dm−1 , then d j := d j for j = 1, , m − and dm := ρdm ; otherwise, there exists an integer j0 such that d j0 < ρdm ≤ d j0 +1 , then d j := d j for j = ... respectively For ρ ∈ [0, d1 /dm ], we have d1 + t = f4 (ρ), d2 = d1 , and dm + s = f1 (ρ) For ρ ∈ [d1 /dm , d2 /dm ], we have d1 + t = d1 + f2 (ρ), d2 = ρdm , and dm + s = dm−1 + f1 (ρ) For ρ ∈ [d2...

Ngày tải lên: 21/06/2014, 20:20

... Space-Time Channel Modeling for Wireless Communications Finally, we would like to thank the Editorial Office of EURASIP Journal on Advances in Signal Processing and the Editor-in-Chief for the unremitting ... appropriate wireless environments The first paper in the second group of papers is by P Almers et al It is an up-to-date survey of radio propagation and channel models used to emulate wireless channels for ... including models found in wireless MIMO standards The second paper by J-M Conrat and P Pajusco presents a versatile physical channel simulator model developed by France Telecom for wideband MIMO systems...

Ngày tải lên: 21/06/2014, 22:20

... of the optimum value of η for simulation purposes So, for each network configuration, the best value of η can be determined for the performance evaluation Furthermore, for different configurations ... scheme outperforms both MMSE–MMSE and ZF–ZF methods Finally, networks with and relays are simulated In the former setup each relay has four antennas and in the later case three antennas For this ... to be available for optimum relay design The optimization can be performed at the destination, and then the processing results are fed back to the relays Although the closed form formula is not...

Ngày tải lên: 21/06/2014, 23:20