1 6 block diagram of a communication system
On the performance and capacity of space time block coded multicarrier CDMA communication systems
Ngày tải lên :
16/09/2015, 15:54
... Evolution of Cellular Mobile Communication Systems 1. 1 .1 Analogue First Generation Cellular Systems In the late of 19 70s and early 19 80s, various first generation (1G) cellular mobile communication systems ... the BLAST architecture In stead of transmitting independent data streams, the same data stream is transmitted in an appropriate manner over all antennas All transmit signals occupy the same bandwidth, ... Other systems that are based on TDMA are Digital AMPS (DAMPS) in North America and Personal Digital Cellular (PDC) in Japan DAMPS system, based on the IS-54 standard, operates in the same spectrum...
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Exact modeling of multiple access interference, ber derivation and a method to improve the performance of UWB communication systems
Ngày tải lên :
05/10/2015, 22:04
... MODELS 2 .1 System Models 2 .1. 1 TH-PPM System 2 .1. 2 TH-PAM System 2 .1. 3 DS-PAM System 2.2 Channel model 7 10 11 12 EXACT PERFORMANCE ANALYSIS IN AWGN CHANNELS 15 3 .1 Introduction and motivation 3.2 ... Variance of the MAI 6. 7 .1 Proposed scheme 6. 7.2 Maximum ratio RAKE combiner 6. 7.3 Multi Rx scheme 6. 8 Simulation results 6. 9 Conclusion 60 62 63 65 66 66 68 69 70 71 72 73 73 78 CONCLUSION AND FUTURE ... right candidate for the purpose of implementation or standardization Different performance measures are available to evaluate communication systems, with different levels of ease of evaluation and...
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List the components of a radio system
Ngày tải lên :
13/09/2012, 10:52
... – Advantages • Can carry up to three times the amount of data as TDMA • Transmissions are much harder to eavesdrop on • A would-be eavesdropper must also know the exact chip in which the transmission ... the signal • Attenuation – A loss of signal strength • Multipath distortion – As a radio signal is transmitted, the electromagnetic waves spread out 24 Signal Strength (continued) 25 Radio Frequency ... • List the components of a radio system • Describe how different factors affect the design of a radio system • Explain the radio frequency spectrum Components of a Radio System • Components include:...
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Principles of Digital Communication Systems and Computer Networks
Ngày tải lên :
18/09/2012, 10:13
... 0.05) = 1. 65 bits/ký tự Entropy nguồn 1. 469 bits/ký tự Vậy, nguồn tạo dãy kí tự nối tiếp sau: A A B A B A A B B B việc mã h a nguồn tương ứng với dòng bit: 11 0 11 0 10 11 1 Sơ đồ mã h a yều cầu ... h a đặc biệt để khắc phục ảnh hưởng nhiễu Hai kh a cạnh đ a Shannon báo A Maththemathical Theroy of Communication xuất năm 19 48 Bell System Technical Journal - nơi đ a lý thuyết thông tin Shannon ... nguồn tạo hai ký tự A B với xác suất nhau: Hai ký tự mã h a trên, A biểu diễn số B Chúng ta yêu cẩu 1bit/ký tự.Bây xét nguồn tạo hai ký tự Nhưng thay mã h a A B trực tiếp, mã h a AA, AB, BA, BB Xác...
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Exergoeconomic optimization and improvement of a cogeneration system modeled in a process simulator using direct search and evolutionary methods
Ngày tải lên :
05/09/2013, 16:30
... variable Case Case EIS EIS Alternative Alternative Mathematical EIS optimization Alternative EIS Alternative Mathematical optimization GT 01. kW (kW) GT0 1a. kW (kW) 4 06 01 4 06 01 414 07 410 97 45493 410 26 ... 410 97 45493 410 26 410 97 410 97 4 2 16 2 410 97 410 97 4 2 16 2 GT 01. f 0.75 0.75 0.53 0.74 0. 76 0.53 GT0 1a. f S09.p (bar) 0.75 11 0.5 0.74 10 5.9 0. 71 108.2 0.75 11 8.8 0. 76 11 8.8 0 .64 10 9.3 S14.p (bar) 3.0 3.0 ... accounting: Capabilities and drawbacks Energy 20 06, 31( 1), 16 4 -18 0 Giannantoni C., Lazzaretto A. , Macor A. , Mirandola A. , Stoppato A. , Tonon S., Ulgiati S Multicriteria approach for the improvement of...
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Reliability analysis of a power system based on the multi state system theory
Ngày tải lên :
03/01/2014, 19:38
... operators can also be defined according to the situations [60 00, 61 5 0 ) , [ 61 5 0, 63 00 ) , [63 00, 64 50 ) , [64 50, 68 00 ) 96 q = {0.0 013 5,0.0 214 0,0 .13 5 91, 0.3 413 4, 0.3 413 4,0 .13 5 91, 0.0 214 0,0.0 013 5} ... the system is above 22.8 Ah, the system is reliable, though the capacity of a battery is lower than 5700 mAh Suppose the capacity of the first branch is 560 0 mAh and the capacity of other branches ... 2003 R M Barton, and W W Damon, “Reliability in a multi-state system, ” Proceedings Sixth Annual Southeastern Symposium on Systems Theory, Louisiana, 19 74 [11 ] [12 ] [13 ] 98 R E Barlow, and A S Wu,...
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Tài liệu Architecture of a Database System ppt
Ngày tải lên :
20/02/2014, 05:21
... life of a query in a database system This also serves as an overview of the remaining sections of the paper Consider a simple but typical database interaction at an airport, in which a gate agent ... operators exist to request data from the database These operators make calls to fetch data from the DBMS’ Transactional Storage Manager (Figure 1. 1, bottom), which manages all data access (read) ... architectural issues Textbook presentations of database systems traditionally focus on algorithmic 14 2 1. 1 Relational Systems: The Life of a Query 14 3 and theoretical issues — which are natural to teach,...
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Báo cáo " Development of a spectrometry system Using lock-in amplification technique " doc
Ngày tải lên :
05/03/2014, 14:20
... very clearly in the Raman spectra of the petrol extract sample 5B 110 and 5B 11 (petrol extracts from Bach Ho, Vietnam) The Raman spectra excited by He-Ne laser showed more Raman peaks, that means ... computer, a sequence of digital signals is sent to LPT port: 00 01; 0 011 ;0 010 ; 011 0; 010 0 ;11 00 ;1 000 ;10 01 corresponding to positions steps 1 2→ →4 →5 6 →7 →8 (Fig.3) [3] Fig.3: Diagram of stepper motor ... Nguyen Anh Tuan, Nguyen Huy Binh excitation Our new spectrometry system shows many advantages for studying Raman and Fluorescence spectra as well as weak optical signal spectra in general Construction...
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Báo cáo khoa học: Insights into the design of a hybrid system between Anabaena ferredoxin-NADP+ reductase and bovine adrenodoxin pot
Ngày tải lên :
31/03/2014, 07:20
... Time-sequential spectra recorded after addition of CYP1 1A1 to an anaerobic CO-saturated sample containing the reaction mixture FNRrd/Adxox gave rise to a peak at 450 nm together with absorbance decreases ... 265 6– 26 61 ´ Hervas, M., De la Rosa, M .A & Tollin, G (19 92) A comparative laser-flash absorption spectroscopy study of algal plastocyanin and cytochrome c552 photooxidation by photosystem I particles ... 37, 13 60 4 13 61 3 Martı´ nez-Julvez, M., Hermoso, J .A. , Hurley, J.K., Mayoral, T., ´ ´ Sanz-Aparicio, J., Tollin, G., Gomez-Moreno, C & Medina, M (19 98) Role of Arg100 and Arg 264 from Anabaena PCC 711 9...
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báo cáo hóa học:" From HIV diagnosis to treatment: evaluation of a referral system to promote and monitor access to antiretroviral therapy in rural Tanzania" doc
Ngày tải lên :
20/06/2014, 08:20
... Tanzania Sex Transm Infect 2009, 85:308- 312 Mshana GH, Wamoyi J, Busza J, Zaba B, Changalucha J, Kalluvya S, Urassa M: Barriers to accessing antiretroviral therapy in Kisesa, Tanzania: a qualitative ... rates at a HIV treatment programme in rural Tanzania AIDS Care 2009, 21: 63 2 -63 7 Mbata D, Wringe A, Busza J, Roura M, Nhandi B, Nsigaye R, Kumuloga Y, Ndee M, Clark B, Marston M, Urassa M, Zaba ... Med 19 99, 49 :14 73 -14 87 Atkinson S, Ngwengwe A, Macwan'gi M, Ngulube TJ, Harpham T, O'Connell A: The referral process and urban health care in sub-Saharan Africa: the case of Lusaka, Zambia Soc...
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Báo cáo toán học: " Existence of solutions of a new system of generalized variational inequalities in Banach spaces" ppt
Ngày tải lên :
20/06/2014, 21:20
... multi-valued variational variational inequalities Publ a Math Debrecen 54, 267 –279 (19 99) 13 Kassay, G, Kolumb´n, J, P´les, Z: Factorization of Minty and Stampacchia variational a a inequality system ... of solutions of variational inequalities in Banach space J Math Anal Appl 295, 11 5 12 6 (2004) 16 Li, JL: The generalized projection operator on reflexive Banach spaces and its application J Math ... Existence of solutions of a new system of generalized variational inequalities in Banach spaces Somyot Plubtieng∗ and Tipphawan Thammathiwat Department of Mathematics, Faculty of Science, Naresuan University,...
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Báo cáo hóa học: " Research Article Dynamics of a Rational System of Difference Equations in the Plane" pot
Ngày tải lên :
21/06/2014, 05:20
... mapping a1 /ak , a2 /ak , , ak /ak for a1 , a2 , , ak ∈ Rk with given by q a1 , a2 , , ak k k a1 , a2 , , ak , , it is shown in such ak / and : R → R is given by a1 , a2 , , ak ... α2 / 1 √ α2 / 1 n P3 1 P2 P1 n 1 P2 P2 n √ n 1 √ P3 1 P3 1 n n 1 1 − α2 , 4 .11 α2 / 1 n α2 / 1 n 1 1 , where P1 , P2 , and P3 satisfy P1 1 P1 1 P1 1 √ α2 β2 x0 P3 y0 , P2 − P3 α 1 P2 ... generated by a class of rational mappings,” Journal of Difference Equations and Applications, vol 12 , no 12 , pp 12 01 12 12, 20 06 S N Elaydi and W A Harris, Jr., “On the computation of An ,” SIAM Review,...
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Báo cáo hóa học: "Research Article The Solvability of a New System of Nonlinear Variational-Like Inclusions" ppt
Ngày tải lên :
22/06/2014, 11:20
... v1 , C1 u1 − u1 − u2 ≤ μ2 α2 1 1 1 − 1 N1 A1 u2 , B1 v2 , C1 u1 − N1 A1 u2 , B1 v2 , C1 u2 2 ≤ 1 1 − 2 1 3 .10 u1 − u2 , 1 u1 − u2 3 .11 u1 − u2 , N1 A1 u2 , B1 v1 , C1 u1 − N1 A1 u2 , B1 v2 ... − g1 u1 − f1 − g1 u2 u − u2 G1 f1 − g1 u1 − G1 1 d1 − 1 s1 f1 − g1 u2 3.7 1 N1 A1 u1 , B1 v1 , C1 u1 − N1 A1 u2 , B1 v2 , C1 u2 r v1 − v2 Because f1 −g1 is δf1 ,g1 -strongly monotone, f1 , ... , C1 u1 3 .12 ≤ 1 1 v1 − v2 In terms of 3.7 – 3 .12 , we obtain that F 1 u1 − v1 − F 1 u2 , v2 ≤ m1 u1 − u2 1 d1 − 1 s1 c1 1 l1 u − u2 1 v1 − v2 r v1 − v2 3 .13 Similarly, we deduce that...
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Báo cáo hóa học: "ASYMPTOTIC BEHAVIOR OF A COMPETITIVE SYSTEM OF LINEAR FRACTIONAL DIFFERENCE EQUATIONS" docx
Ngày tải lên :
22/06/2014, 22:20
... [9] [10 ] [11 ] [12 ] [13 ] [14 ] [15 ] [ 16 ] [17 ] , Geometry of exclusion principles in discrete systems, Journal of Mathematical Analysis and Applications 16 8 (19 92), no 2, 385–400 M P Hassell and ... in [12 ] Lemma 2 .1 S1 and S2 are invariant sets Lemma 2.2 Assume that b < and e < (1) Set S1 , defined by (2 .1) , is an invariant set of (1. 1) and every solution {(xn , yn )} of (1. 1) with initial ... Theoretical Population Biology (19 76) , no 2, 202–2 21 P Hess and A C Lazer, On an abstract competition model and applications, Nonlinear Analysis Theory, Methods & Applications 16 (19 91) , no 11 , 917 –940...
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Báo cáo khoa học: "Intracranial pressure monitoring in intensive care: clinical advantages of a computerized system over manual recording" potx
Ngày tải lên :
13/08/2014, 03:20
... (manual or digital) can better fit the aim When a detailed analysis of ICP of individual cases is desirable, a digital system with proper filtering appears to be more accurate References 10 11 ... was calculated (with proprietary software) from the digital data as follows: Page of (page number not for citation purposes) Critical Care Vol 11 No Zanier et al Number of minutes of ICP greater ... from analysis, leaving 36, 492 data points that were averaged per minute and per hour To address the capability of the manual system to properly capture ICP increases and to adequately rank the...
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THE DIRECT REPROGRAMMING OF SOMATIC CELLS: ESTABLISHMENT OF A NOVEL SYSTEM FOR PHOTORECEPTOR DERIVATION
Ngày tải lên :
24/08/2014, 12:37
... TGA ACC CAG TGA TCT GTA AGA ACC TGC TTC C GCG GAA GAA AAA GGG ATT CTT GCC AGA GAC C CTC AGA AAG TGA TGA CAA GCG AGC CCT CCT AAA TCT GGG CCA AA GCC CAG AGC TAT CTA GTC CTA AAC CT AGC AAC CGC AAT ... ACT CAC AG GGA ACT CTG GAC TTG AGC ATG CAT TGA CAA GAG CCT CAG AAA CCT C GGA GAA TGA TGA GGA GAT CAA GCA GC Internal Primer Name MYBBP 1A7 MYBBP 1A5 00 MYBBP 1A9 94 MYBBP 1A1 4 81 MYBBP 1A1 997 MYBBP 1A2 517 ... ATG AGC TCA GAA AGT GAT GAC AAG C REVERSE ATA TAT ACC GGT GCC ACC ATG ACC AAA TCA TAC AGC GAG A REVERSE ATA TAT CTC GAG GCC ACC CTA ATC GTG AAA GAT GGC ATT AAG CT FORWARD REVERSE NEUROD1 ATA TAT...
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MỘT SỐ KHÁI NIỆM CƠ BẢN VỀ THÔNG TIN VÔ TUYẾN CONCEPTs OF WIRELESS COMMUNICATION SYSTEM
Ngày tải lên :
01/08/2015, 20:29
... 0. 012 1 0 .15 2 0.0204 0.0309 0.05 26 0 .15 3 0 . 16 8 0 .19 0.23 0.282 0.3 81 0.455 0.489 0.535 0 .60 2 0. 715 0.899 0. 869 0.922 0.992 1. 09 1. 26 1. 52 1. 36 1. 43 1. 52 1. 66 1. 88 2.22 1. 91 2 .11 2.28 2.54 2. 96 ... thường Tổng quan Trunking interval, values average, peak statistical analysis traffic forecast seasonal variation network configuration ① raw traffic ② measured traffic ③ representative traffic ④ expected ... MS 21 BTS-B Handoff Region HAND-OFF CALL PROCESSING Cell B Các dạng Hand-off 22 Scope of Hand-off: Intra-BS, Intra-MSC Handoff Inter-BS, Intra-MSC Handoff Inter-BS, Inter-MSC Handoff Khái niệm...
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Co existence of wireless communication systems in ISM bands an analytical study
Ngày tải lên :
12/09/2015, 10:21
... Presence of 802 .11 b 12 6 5.3 12 9 5.3 .1 Efficiency Ranges for 802 .11 b Four Data Rates 12 9 5.3.2 Safe Distance 13 0 5.3.3 Packet Segmentation 13 3 5.3.4 5.4 Throughput of 802 .11 b Data Rate Scaling 13 7 ... Figure 2 .11 Block diagram of HFA38 61 modulator circuit Figure 2 .12 HFA38 61 RAKE receiver Figure 2 .13 802 .11 b modulations performance under AWGN channel Figure 2 .14 802 .11 b BER performance under AWGN ... Performance of Bluetooth 29 2.4 .1 Under AWGN Channel 29 2.4 .1. 1 Semi-analytical Approach 29 2.4 .1. 2 Accurate Theoretical Approach 31 2.4 .1. 3 Approximate Theoretical Approach 33 2.4.2 Under Fading...
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Design and control of a teleoperation system for humanoid walking
Ngày tải lên :
04/10/2015, 10:25
... Supervisory and Traded Control 2.3 Applications of Teleoperation on Humanoid Walking 6 10 10 11 12 12 13 13 14 14 15 17 17 19 19 21 22 27 29 29 29 31 Kinematic Study 4 .1 ... CTL2 0 16 H CTL2 0 16 DAQ OUTPUTS (1) ENCODER CHANNEL A & B (1) SEL D1 CLK +5V VCC D0 14 D2 13 D3 12 D4 11 D5 DAQ INPUTS (3) 10 CHB D6 VSS D7 GND 16 D0 15 CLK SEL OE RST CHA D0 D3 12 D4 11 D5 DAQ OUTPUTS ... 3 .6 3.7 3.8 3.9 5 .1 5.2 5.3 6 .1 6. 2 6. 3 6. 4 6. 5 Control block diagram of the method direct mapping of joints Control block diagram of the method mapping of foot positions Frame attachment...
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OPTIMAL placement of FACTS devices by genetic algorithm for the increased load ability of a power system
Ngày tải lên :
26/03/2016, 02:38
... 2 011 Fig Variation of Total Cost with Generation for 13 0% Reactive loading Fig Variation of Total Cost with Generation for 200 % Reactive loading VI CONCLUSION In this approach, GA based optimal ... installation of FACTS devices in the transmission system REFERENCES [1] Fig Variation of Total Cost with Generation for 16 0 % Reactive loading Fig Variation of Total Cost with Generation for 17 5 ... 200% of loading are shown in Table Phase angles are given in radian The locations where different FACTS devices are placed is shown in Table A comparative study of the operating cost of the system...
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