rrm in wireless microcellular systems

... avoid near-far problems with single-user receivers In macro-cellular systems, heavy multipath phenomena in urban areas may introduce intra-cell interference in downlink Chapter 2: The Communications ... limit in DS-CDMA systems increases with the processing gain and decreases and the inter-cell interference factor The base station must be provided with an adequate number of receivers in order ... consider having M equal mobile terminals perfectly power-controlled in each cell of the DS-CDMA cellular systems (single traffic case) We can write the following SNIR expression, assuming a single-user...

Ngày tải lên: 12/10/2016, 13:41

... mixed integer non-linear programming (MINLP) with nonlinearities in both the objective function and constraints We propose a method to convert the MINLP to an equivalent binary linear programming ... variable for user l in BS n using modulation q on subcarrier k n is omitted in single-cell or distributed systems; k is omitted in single carrier systems; q is omitted in systems using fixed modulation ... resources A Point-to-Point Scenario A point-to-point communication consists of a single transmitter and a single receiver, which corresponds to a single link in an ad hoc network, or a single-cell...

Ngày tải lên: 10/09/2015, 15:49

... communication ICI: Interchannel Interference IDFT: IF: Inverse Discrete Fourier Transform Intermediate Frequency IP: Integer Programming IFFT: Inverse Fast Fourier Transform ISI: Intersymbol Interference ... generation wireless mobile systems, technical interests were mainly focused on increasing system capacity for voice services However, there are increasing demands recently for multimedia services including ... schemes and joint detection become necessary in CDMA systems to minimize the inter-user interference in order to obtain the best tradeoff between energy and spectral efficiency Unfortunately, in some...

Ngày tải lên: 15/09/2015, 17:11

... inserting a record in a file Interception This is an attack on the confidentiality of the network such as wiretapping or eavesdropping to capture data in a network Eavesdropping is easy in a wireless ... wireless network can be eavesdropped from outside the building where the network is operating In most wireless networks, there is a kind of link level ciphering done by the MAC entities Jamming ... challenge string [14–16] 12.5 Mobile IP Mobile IP was developed in response to the increasing use of mobile computers in order to enable computers to maintain Internet connection during their movement...

Ngày tải lên: 29/09/2013, 21:20

... selection/maximal ratio combining and synchronous DS-CDMA, and recall the main functioning EURASIP Journal on Advances in Signal Processing principles of GR We carry out the performance analysis in Section where ... processing gain N and the number of users K under multipath fading channel model in DS-CDMA system employing GR Finally, simulation results are given in Section 5, and some conclusions are made in ... better understanding (17), we recall the main functioning principles of GR The simple model of GR in form of block diagram is represented in Figure In this model, we use the following notations:...

Ngày tải lên: 21/06/2014, 05:20

... implementation 4.4 Training Algorithm The classification process basically consists of two phases: training phase and testing phase A training set is used in supervised training to present the proper ... that certain value A minimum SNR for which the FRP is less than 1%, SNRmin has been considered in these results Accordingly, the SNRmin for inter-class recognition (Case I) is dB, for inter-class ... allows speeding its learning process and reducing its size Among several possible features selection algorithms, we will investigate principal component analysis (PCA) and linear discriminate analysis...

Ngày tải lên: 21/06/2014, 16:20

... superior to the existing approaches and succeeds in maximizing the sum rate in a cell, while providing each EURASIP Journal on Advances in Signal Processing user with the minimal requested data ... 2 information from the PHY layer is allowed to in uence the operation of the MAC layer The second paper, “Exploiting transmit buffer information at the receiver in block-fading channels” by Dinesh ... efforts in making this special issue They would also like to thank the Editor -in- Chief, and the editorial staff of Hindawi Publishing Corporation Petar Popovski Mary Ann Ingram Christian B Peel Shinsuke...

Ngày tải lên: 21/06/2014, 22:20

... IEEE 802.11b systems are introduced Then the performance of these modulations in the two systems is evaluated under AWGN, fading channel and interference following the introduction 2.1 Indoor Channel ... explained after understanding the regular Continuous Phase Frequency Shift Keying (CPFSK) In a memoryless FSK system, abrupt switching from one frequency to another in successive signaling intervals ... 802.11 in the near future, the mutual interference between them has attracted much attention in the industry and academia area In order to mitigate interference between the two wireless systems, ...

Ngày tải lên: 12/09/2015, 10:21

... commercial broadcast systems, satellite broadcast systems, telemetry and remote monitoring systems Systems that sense the environment and/or objects in the environment, including radar systems that ... mapping the surface of the Earth or planets Systems that aid in navigation or determine the location of an object on the Earth or in space Each of these systems contains at least one transmitting ... the blocks contained within the dashed outline are fundamental and necessary to wireless systems With the exception of the antennas, all of the remaining blocks may also be found in wired system...

Ngày tải lên: 17/09/2012, 10:44

... washing, was obtained in R5 while in other cases it was less than day This result suggested that adding polysilicate and Fe(III) mixture would bring better effect to mitigate membrane fouling ... worked more effectively on protein and carbohydrate removal The removal amount increased according to the 206 increase in Fe(III) concentrations Particularly, the protein concentrations decreased ... can be seen that the fouling frequency found in the three MBR systems were almost similar during the 35 days of operation Moreover, the mean periods per one washing in R1, R2, and R3 were 1.0...

Ngày tải lên: 05/09/2013, 10:15

... to deliver broadband services in point-to-point or point-to-multipoint configurations to residential and commercial customers; near 30 GHz In Europe and most developing countries, frequencies near ... by the FCC for fixed wireless access in the United States including LMDS Figure 8.2 shows a general configuration on the Local Multipoint Distribution Service (LMDS) In LMDS systems, the propagation ... different radio technologies in wireless local loop systems and the varying levels of services that can be supported Single and multiple line units that connect to standard wireline telephones are very...

Ngày tải lên: 29/09/2013, 21:20

... termination and invokes the report generator when the conditions for terminating the simulation are satisfied Simulation begins at time with the main program invoking the initialization routine, ... delay in the path including the Internet routing delays We simulated a data combined multimedia network operating in a WLAN environment The network has 20 wireless stations capable of transferring ... correct [1–10] Systems in general can be classified into stochastic and deterministic types [1–3]: † Stochastic systems In this case, the system contains a certain amount of randomness in its transitions...

Ngày tải lên: 29/09/2013, 21:20

... Telecommunication Systems Department of Telecommunication Systems School of Engineering School of Engineering Publisher: Blekinge Institute of Technology Blekinge Institute of Technology Printed by Kaserntryckeriet, ... context of demand modeling and provisioning For instance, [27] is using a ΔT = interval when measuring the point-to-point traffic matrix in the IP backbone Data are analyzed e.g regarding the mean-variance ... e.g periodically; • Messaging services, sending information essentially in one direction when required; • Interactive services, sending information in both directions in a request/response manner...

Ngày tải lên: 18/10/2013, 12:15

... described in [ONG84] Our initial experience with the system is that dynamic linking is not preferable to static linking One problem is that initial loading of routines is slow Also, the ADT routines ... number of index keys in an index number of pages in the index the constant appearing in: rel-name.field-name OPR value the maximum value in the key range if known the minimum value in the key ... an installation wants at the time the DBMS is installed In this case, all routines could be linked into the run time system at system installation time by the linker provided by the operating...

Ngày tải lên: 22/10/2013, 10:15

Ngày tải lên: 12/12/2013, 08:18

... because the underlying upset mechanisms are different The SEL rate significantly increases with increasing supply voltage Also an increase in operating temperature results in an increase in SEL rate, ... level will increase Also, the logic error rate of a system is growing Therefore, the importance of using error-correcting coding (ECC) to detect and correct soft errors in DRAMs is increasing for ... of Sun in 1999/2000 This problem has been reported in a legendary article in Forbes magazine [13] The Enterprise was the flagship in Sun’s server line and was used by many companies, including major...

Ngày tải lên: 01/01/2014, 17:15

... broadening the definition of a system of innovation is that the problem of delimiting the system increases In Lundvall (1992) this problem is addresses by saying that determining which institutions ... increasingly being framed within an international arena The links between sub-regional, regional, national and international systems of innovations imply hat analyses should include actors and institutions ... library in Umeå Some years later an odontological clinic, offereing basic dental training, was set up and in 1954 an institute of medicine was established, both of them in Umeå When other institutes...

Ngày tải lên: 16/01/2014, 16:33

... correctly installed TrueNet™ Cabling Systems have impedance which is within ±3 Ohms throughout the cabling channel Most impedance mismatch problems happen in the cross-connect patch cord in the ... cabling system on a continuous basis From this testing, measurements of impedance versus distance and frequency are made, finding the impedance mismatches and discontinuities in a network channel ... an organisation in today’s global e-commerce environment The network cabling infrastructure must be able to support an enterprise’s increasing rates of data transmission now and in the future It’s...

Ngày tải lên: 19/01/2014, 05:20

... controllers for linear continuous-time systems Proceedings of the 27th Chinese Control Conference, Kunming, Yunnan, China, 678-682, July 16-18, 2008 27 28 Advances in Discrete Time Systems [24] Xu, ... ideas contained in the book Publishing Process Manager Iva Lipovic Technical Editor InTech DTP team Cover InTech Design team First published December, 2012 Printed in Croatia A free online edition ... and reproduction in any medium, provided the original work is properly cited 30 Advances in Discrete Time Systems Advances in Discrete Time Systems is used for time-delay systems In the last decade,...

Ngày tải lên: 14/02/2014, 09:20

... coined the term bounded rationality, ‘boundedly rational agents experience limits in formulating and solving complex problems and in processing (receiving, storing, retrieving, transmitting) information’ ... recognized expert in multi-agent systems She was one of the pioneers of modeling BDI systems, recently introducing approximate reasoning to the agent-based approach Rineke Verbrugge Rineke Verbrugge ... as writing a book, including having to without us for long stretches of time Barbara Dunin-Keplicz ¸ Warsaw keplicz@mimuw.edu.pl Rineke Verbrugge Groningen rineke@ai.rug.nl www.it-ebooks.info www.it-ebooks.info...

Ngày tải lên: 18/02/2014, 15:20