amp enabling parameter estimation algorithms for wireless communications systems

... 2873–2884, 2004 [20] K Zarifi and A B Gershman, “Performance analysis of subspace-based signature waveform estimation algorithms for DS-CDMA systems with unknown correlated noise,” in Proceedings ... signature waveform estimation in synchronous CDMA systems, ” IEEE Transactions on Communications, vol 44, no 10, pp 1346–1354, 1996 [10] M Torlak and G Xu, “Blind multiuser channel estimation in ... channel estimation for code division multiple access communication systems, ” IEEE Transactions on Communications, vol 44, no 8, pp 1009–1020, 1996 [9] H Liu and G Xu, “Subspace method for signature...

Ngày tải lên: 22/06/2014, 23:20

... beamwidth for all algorithms In all cases, DMMT-DA provides much better performance than other algorithms, and its superiority is even greater in network examples with larger θmin , for example, ... PERFORMANCE EVALUATION We have evaluated the performance of our distributed algorithms in many network examples The evaluation is done via simulation written in C++ for the set of heuristic algorithms ... that our distributed multicast algorithms for directional communications outperform other centralized multicast algorithms significantly in terms of network lifetime for both single-session and multiplesession...

Ngày tải lên: 22/06/2014, 22:20

... 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 systems ... 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 ... link capacity [3] New MIMO systems represent a huge philosophical change in how wireless communications systems are designed This change reflects how we view multipath in a wireless system: The Old...

Ngày tải lên: 20/11/2012, 11:36

... 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 ... Design for Wireless Communications For a listing of recent titles in the Artech House Microelectromechanical Systems (MEMS) Series, turn to the back of this book RF MEMS Circuit Design for Wireless ... Power amp Driver amp FREF PLL Modulation Loop filter Figure 1.8 Simplified DECT transceiver architecture 12 RF MEMS Circuit Design for Wireless Communications Amp MXR-1 I LPF LNA BPF LO 90º Amp...

Ngày tải lên: 19/01/2014, 20:20

... Malouf, R 2002 A comparison of algorithms for maximum entropy parameter estimation In HLT McCallum A, D Freitag and F Pereira 2000 Maximum entropy markov models for information extraction and segmentation ... conditional sequence models: a CMM for POS tagging and a CRF for Chinese word segmentation Our results show that ME estimation with L2 regularization achieves the best performing estimators in all of ... samples to choose a parameter vector 𝒘, such that the mapping 𝐹(𝑥) is capable of correctly classifying unseen examples We will describe the five estimators in our study individually 2.1 ME estimation...

Ngày tải lên: 08/03/2014, 02:21

... arrival 1.5 AN EXAMPLE The examples in the remainder of the book will be wireless communications examples, specifically radio communications such as cellular communications In such systems, there ... variables 73 6.1 Example of sequence metrics 116 7.1 Example of MAPSD symbol metrics 153 7.2 Example of message metrics formed from MAPSD metrics 154 7.3 Example of message metrics formed from MMSE ... literature, channel modeling information can be found for wireless (radio) communications [Tur72, Suz77], wireline communications (twisted pair) [Fis95], PROBLEMS 27 optical communications over fiber...

Ngày tải lên: 16/03/2014, 22:20

... 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 ... fixed for a great majority of the systems For example, GSM, PDC, or CDMA BSs are installed at a place where they remain for a long time Other examples are geostationary satellite mobile systems...

Ngày tải lên: 27/05/2014, 04:01

... methods for marking fixed points in the glottal cycle as required by the jitter estimation algorithms We formalise the three jitter models that were used, followed by a description of the jitter estimation ... jitter estimation algorithms that were evaluated A comparison of the algorithms for both pitch marking and jitter estimation is then presented A set of 14 tools, combining the different algorithms, ... dypsaMP 0.3 0.01 0.2 0.1 Amplitude (V) Amplitude (V) 0.005 0 −0.1 −0.2 −0.3 −0.005 −0.4 −0.5 −0.01 1.52 1.54 1.56 1.58 1.6 Time (samples) 1.62 ×104 −0.6 1.52 1.54 1.56 1.58 1.6 1.62 ×104 Time (samples)...

Ngày tải lên: 21/06/2014, 20:20

... and assuming that each packet of M symbols contains L information symbols and M − L overhead symbols, reserved, for example, for channel estimation and/or parity checks, the throughput Tk can ... spreading codes is also considered For the former case, some analytical considerations on the convergence properties of the proposed adaptive algorithms are also given For the latter case, instead, ... SINR γ Then, for fixed powers, we update the receive filter using, for example, the decision-directed RLS algorithm Letting R(0) = IN , with a small positive constant, letting λ, the forgetting factor,...

Ngày tải lên: 21/06/2014, 22:20

... 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 ... 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 The ... 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...

Ngày tải lên: 21/06/2014, 22:20

... 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 Communications: ... on Wireless Communications, vol 3, no 6, pp 2396–2406, 2004 [6] F Giannetti, M Luise, and R Reggiannini, “Mobile and personal communications in the 60 GHz band: a survey,” Wireless Personal Communications, ... locations for both the room and hallway, namely, R11-R14 and R21R24 were sampled (see Figure 5) At these locations, channel parameters and fading statistics were extracted as described in Section For...

Ngày tải lên: 22/06/2014, 22:20

... still expect similar performance Furthermore, for an MPSK modulated signal, that is, |X(m)|2 = A for all m, the signal estimation can be performed by using only the phase information Thus, we can ... two curves agree and justify the use of MCRB(h) as a performance measure for unbiased channel estimation algorithms in OFDM systems, both for constant modulus and nonconstant modulus signals SIMULATION ... estimation accuracy We performed such a EM-Based Channel Estimation Algorithms for OFDM 1469 35 100 30 10−1 20 BER Iterations 25 15 10−2 10 10−3 10 12 14 16 18 20 Eb /N0 Perfect CIR Initial estimation...

Ngày tải lên: 23/06/2014, 01:20

... another CCU Wireless Access Tech Lab Wireless Access Tech Lab Introduction (2) CCU Wireless Access Tech Lab Wireless Access Tech Lab Introduction (3)  In conventional telephone systems, it ... CCU Wireless Access Tech Lab Wireless Access Tech Lab Spread Spectrum Multiple Access (8) CCU Wireless Access Tech Lab Wireless Access Tech Lab Spread Spectrum Multiple Access (9) CCU Wireless ... simultaneously CCU Wireless Access Tech Lab Wireless Access Tech Lab Frequency Division Multiple Access (FDMA) (2)  Allocation of separate channels to FDMA signals CCU Wireless Access Tech Lab Wireless...

Ngày tải lên: 11/07/2014, 21:20

... processing and equalization for wireless communications Uppsala, 318pp ISBN 91-506-1350-2 In this thesis several aspects of space-time processing and equalization for wireless communications are treated ... those used for channel estimation and those used for receive and transmit processing, see Figure 1.6 We will discuss algorithms in these groups separately below The receive algorithms for TDMA ... 1.4.1 Channel Estimation Algorithms 1.4.2 TDMA Receive Algorithms 1.4.3 CDMA Receive Algorithms 1.4.4 Transmit Algorithms 1.5...

Ngày tải lên: 26/10/2014, 14:30

... Discussions on Large Samples and Censored Samples 192 6.5.1 WLSE for Large Samples 192 6.5.2 WLSE for Censored Samples 193 6.5.2.1 A Numerical Example ... existing Weibull parameter estimation methods 28 Chapter Basic Weibull Parameter Estimation Methods This chapter describes three nowadays most widely used parameter estimation methods for the Weibull ... The general form of the Weibull distribution has three parameters: the scale parameter, the shape parameter and the location parameter In reliability data analysis, the location parameter is...

Ngày tải lên: 12/09/2015, 08:19

... milliseconds for TSPS and PFS, and 15 milliseconds for the b2 PFS Furthermore, the packet loss rate for each scheme is 0% for the TSPS, 1.6 · 10−3 % for the PFS, and 1.6 · 10−4 % for the b2 PFS ... and systems beyond IMT-2000,” June 2003 [2] IEEE 802.16e-2005, “IEEE standard for local and metropolitan area networks—part 16: air interface for fixed and mobile broadband wireless access systems, ... of the packet delay for realtime traffic and K = {50, 100} users τmax − Δτ = 0.04 s) For K = 100, the packet loss rate for each scheduling function is 8.98%, 33.4%, and 16.97% for the TSPS, the PFS,...

Ngày tải lên: 21/06/2014, 23:20

... Compared with the centralized algorithms, only a small performance degradation is observed Devising distributed algorithms with performance as good as centralized algorithms is an interesting ... operation is complete; otherwise, go to Step The performance of the greedy algorithm, of course, will serve as a bound for the performance of the suboptimal algorithms 4.2 Suboptimal algorithm Although ... relays Figure 2: Average transmission power required for different bit loading algorithms with K = Figure 3: Block error rate for different bit loading algorithms with K = 1, 2, and to the destination...

Ngày tải lên: 22/06/2014, 19:20

... cards Finally, the flexibility offered by the implementation platform was exploited for the implementation of a system for outdoor wireless communications on the same hardware The rest of the paper ... components platform also allows the algorithmic performance evaluation (for the physical layer) through field measurements The implementation of the HIPERLAN/2 system on a platform with general ... as standard parameters: request type, command, command parameters and data Shared data are represented as global variables Each physical layer module EURASIP Journal on Embedded Systems MAC layer...

Ngày tải lên: 22/06/2014, 22:20

... within a duration of P samples), are negligible This assumption is reasonable for cellular systems even for fast fading channels For example, for an IS-95 pulse shaping waveform [22], the duration ... future,” IEEE Communications Magazine, vol 34, no 10, pp 33– 41, 1996 L A Stilp, “Carrier and end-user applications for wireless location systems, ” in Wireless Technologies and Services for Cellular ... T S Rappaport, Wireless Communications: Principles & Practice, Prentice-Hall, Upper Saddle River, NJ, USA, 1996 S Glisic and B Vucetic, Spread Spectrum CDMA Systems for Wireless Communications, ...

Ngày tải lên: 22/06/2014, 23:20

... Cell for sequence lengths < 32 176 5.46 Performance of MARSs on Cell for sequence lengths > 32 177 5.47 MARSs on Cell - PPU Idle Time for Sequence Lengths < 32 178 5.48 Performance ... primarily concerned with the performance evaluation and characterization of parallelized algorithms on high performance computing systems The domain we have chosen is bio-informatics and in particular ... thermodynamic parameters used in the calculations [48] Chapter Background 27 Based on this thermodynamic model, algorithms for computing the most stable structures have been proposed, for example Nussinov...

Ngày tải lên: 10/09/2015, 08:34