using telephone and cable networks for data transmission

... tasks of data transfer and signaling are separated in modern telephone networks: data transfer is done by one network, signaling by another 9.7 Figure 9.4 Data transfer and signaling networks ... in this section: Bandwidth Sharing CM and CMTS Data Transmission Schemes: DOCSIS 9.30 Figure 9.16 Division of coaxial cable band by CATV 9.31 Note Downstream data are modulated using the 64-QAM ... can be bidirectional 9.29 9-5 CABLE TV FOR DATA TRANSFER Cable companies are now competing with telephone companies for the residential customer who wants high-speed data transfer In this section,...

Ngày tải lên: 16/02/2014, 20:20

... hand, MAC layer schedules the sensing and data transmission in accordance with the PRR based time slot allocation, while the PHY layer performs adaptive modulation and coding to allow data transmission ... subbands and the allocation is made by a subband; that means each user is dynamically allocated one subband for the duration of one superframe Hence, the effective SNR calculated for each subband ... to perform sensing and data transmission However, the sensing time is fixed to 20%−50% of the super frame size We argue that this allocated sensing period is too long and inappropriate for multimedia...

Ngày tải lên: 21/06/2014, 11:20

... always be a high priority for the data center or network manager­ particularly for — maximizing system performance and uptime ADC’s TrueNet® Fiber plug -and- play solutions for data center applications ... cabling and raceway include: • Easier access to jumpers and cable for maintenance • Logical separation of fiber from copper cables • Reliable addition and upgrade of new equipment TrueNet MPO Microcable ... 12 feet of Plug -and- Play Microcable Trunk slack • Installs with tool-less components for quick and efficient reconfigurations • Provides easier access to jumpers and trunk cables for maintenance...

Ngày tải lên: 17/01/2014, 12:20

... for data transmission 2 Module 10: Creating a Security Design for Data Transmission Lesson: Determining Threats and Analyzing Risks to Data Transmission *****************************ILLEGAL FOR ... security for data transmission, determine the types of networks that your organization uses to transmit data Common networks include LANs, wireless networks, WANs for branch offices and trusted ... design security for different types of data transmission, including traffic on local area networks (LANs), wide area networks (WANs), virtual private networks (VPNs), wireless networks, and the Internet...

Ngày tải lên: 18/01/2014, 05:20

... 3.0 for this example): Principle economy 2.1 Mutual information and difference of t-score between characters Mutual information and t-score, two important concepts in information theory and statistics, ... co-occurrence probability of x and y, and p(x), p(y) are the independent probabilities of x and y respectively As claimed by Church(1991), the larger the mutual information between x and y, the higher the ... location between x and y) is defined as: will I for current of world an be ff? economy appropriate answer It is evident that x and y are to be strongly combined together if mY(x.'y)>>O and to be separated...

Ngày tải lên: 20/02/2014, 18:20

... phone system using TDMA and FDMA 16.10 Figure 16.7 GSM bands 16.11 Figure 16.8 GSM 16.12 Figure 16.9 Multiframe components 16.13 Note GSM is a digital cellular phone system using TDMA and FDMA 16.14 ... FDMA 16.14 Figure 16.10 IS-95 forward transmission 16.15 Figure 16.11 IS-95 reverse transmission 16.16 Note IS-95 is a digital cellular phone system using CDMA/DSSS and FDMA 16.17 Note The main ... 16.4 Note AMPS is an analog cellular phone system using FDMA 16.5 Figure 16.3 Cellular bands for AMPS 16.6 Figure 16.4 AMPS reverse communication band 16.7 Figure 16.5 Second-generation cellular...

Ngày tải lên: 06/03/2014, 12:20

... 42 2.4 Motivation for Active and Programmable Networks 42 2.5 The IEEE 1520 Standards Initiative for Programmable Networks 45 2.5.1 Programming Interfaces for ATM Networks 47 2.5.2 ... in Wireless Networks 232 8.4.1 Handoff in Cellular Networks 232 8.4.2 Handoff in Wireless Local Area Networks 233 8.5 Active Base Stations and Nodes for Wireless Networks 233 ... on networks Previously, he worked as an engineer at Paktel, a cable and wireless company His interests are in the areas of active and programmable networks, wireless and mobile networks, and...

Ngày tải lên: 01/06/2014, 00:30

... Retailing and Store Patronage Behavior Davidsson, P Researching Entrepreneurship THE ROLE OF LABOUR MOBILITY AND INFORMAL NETWORKS FOR KNOWLEDGE TRANSFER edited by Dirk Fornahl Max Planck Institute for ... Regional Social Networks on the Entrepreneurial Development Process Dirk Fornahl 53 Social Networks, Informational Complexity and Industrial Geography Olav Sorenson 79 Transnational Networks and the ... codify and often only serendipitously recognized Information is codified and can be formalized, written down, but tacit knowledge is non-codifiable and cannot, by definition, be formalized and written...

Ngày tải lên: 01/06/2014, 11:20

... factor for the kth user and bm (n) is the transmitted symbol at time n for the kth user on the (k) mth channel-code denoted by cm (t) · ψ is a normalized chip waveform of duration Tc The base-band ... model just proposed for a multirate and multicode DS-CDMA system follows the structural principles of practical downlink UMTS and leads to a convenient algebraic form which allows for a powerful receiver ... receivers (ZF and MMSE) show good performance Adding more virtual users brings the conventional receiver to even worse performance as is shown in Figure For M1 = 64, the different lines for each receiver...

Ngày tải lên: 22/06/2014, 22:20

... frequency, are reported For the trials, a power class three [17] for Bluetooth and a 25 mW power level for WLAN are considered [16] Bit rate equal to Mbps for Bluetooth and 11 Mbps for IEEE 802.11b ... distribution [13] and the CW distribution [27] Both have advantages and disadvantages as explained below The WV distribution is the prototype for all TF transforms, and is the most widely used and the ... IEEE 802.11b and Bluetooth [16, 17] As explained above, they are employed for transmission the ISM band from 2.4 GHz to 2.4835 GHz A single IEEE 802.11b channel uses 22 MHz for transmission [16],...

Ngày tải lên: 23/06/2014, 01:20

... • The performances of the ALL, OPSM and Bivisu, networks are greater using the LASSO method than with the Bayesian networks method • The performances of the ISA, SAMBA and K-means, networks are ... University and Prof G Stolovitzky, IBM Computational Biology Center for helpful discussions We also thank Stanford Microarray Database for making microarray data available and the lab members for the ... network performs equally using NormalGamma and the BDe scoring function On the other hand, Figure demonstrates that the ISA network using GreedyHillClimbing outperformed the SparseCandidate algorithm...

Ngày tải lên: 13/08/2014, 16:20

Ngày tải lên: 12/09/2015, 12:17

... output value is j j Using a Feature Projection Technique for Handling Noisy Data of Machine-labeled Data We finally obtained labeled data of a documents unit, machine-labeled data Now we can learn ... presented two approaches using unlabeled data in text categorization; one approach combines unlabeled data and labeled data, and the other approach uses the clustering technique for text categorization ... Bayes (NB), Roccio) in training data with much noisy data such as machine-labeled data As shown in Table 2, we obtained the best performance in using TCFP at all three data sets Let us define the...

Ngày tải lên: 20/02/2014, 16:20

... codes, and passive error concealment for video In Section 3, we briefly describe the channel models used and provide the performance analysis for the coded and uncoded systems employing nonuniform ... coding for AWGN channel Fixed symbol transmission rate rS = 128 Ksps (1) A single-layer system using either uniform QPSK or uniform 8-PSK without channel coding (2) A 2-layer system using nonuniform ... those using only single-layer coding and uniform MPSK either with or without JSCC The results are demonstrated in Figures 11 and 12 for the AWGN and Rician fading channels, respectively For the...

Ngày tải lên: 22/06/2014, 19:20

... performing the successive data transformation on the input data Eight 8-bit data elements are regarded as a set and fed into an × binary matrix In the successive transformation on each row and ... achieve 117 Mbytes/s data throughput rate at the cost of silicon area of 3.59 mm2 This data- processing rate is fast enough for realtime data protection in multimedia data transmission applications ... transformation, the mapping parameters p, r, q, and s are randomly determined by the chaotic binary sequence in (3), (4), (6), and (7) The row transformation belongs to the type of value transformation...

Ngày tải lên: 23/06/2014, 01:20

... while using channel cycling Other methods to handle channels-quality differences include using the maximum transmission power for data transfer over a route that is built using a lower transmission ... packet, and it can also be used for collecting infrequent and periodic data as in LWB [45] that allows to achieve a low duty-cycling ratio On the other hand, large data dissemination and collection ... 100%-reliability nodes before and after XOR coding 45 47 3.7 3.8 3.9 Performance of Splash with and without opportunistic overhearing Performance of Splash with and without channel cycling...

Ngày tải lên: 10/09/2015, 09:10

... optical network and the customer’s networks The architecture is comprised of base point-to-point and a highavailability network ring The service allows for various and unique data protocols carried ... Commissioning/provisioning sheets • Test data sheets • Diagrams for: - Cable racks - Fiber raceways - Power and grounding - Top and bottom supports - Bay and shelf layouts - Signal flows/fiber ... Commissioning and telemetry data • Synchronization integrity verification • Equipment lists • Protocol testing • Baseline fiber characterization and equipment power-level information • Far-end and graduated...

Ngày tải lên: 22/10/2013, 17:15

... reasons for gathering and analyzing data, as well as the formulation of this data into use cases Use cases will be the foundation for determining data requirements for the system Module 3: Using ... Module 3: Using a Conceptual Design for Data Requirements Activity 3.2: Relating Data Requirements to Conceptual Design Data Requirements Activity 3.1: Identifying Data- Related Use Cases and Data ... 8: Designing Data Services Module 7: Implementing Data Integrity Module 2: Solution Design Processes Designing Data Services and Data Models Module 3: Using a Conceptual Design for Data Requirements...

Ngày tải lên: 10/12/2013, 17:15

... state estimation for nonlinear dynamical systems and also as a basis for on-line learning algorithms for feedforward neural networks [15] and radial basis function networks [16, 17] For more details, ... representing f using (6.13) with the substitutions uk , and z xkþ1 ; (2) representing f using x ðxk ; uk Þ, x xk , u u ;, and z xkþ1 ; and (3) representing g using the substitutions uk , and z yk ... independent Gaussians – one over (x; z) and one over y The approximated posterior for ^ yk has mean yk and covariance Pk 6.4.4 Using Bayesian Methods for Model Selection and Complexity Control Like any...

Ngày tải lên: 23/12/2013, 07:16

... Module 3: Using a Conceptual Design for Data Requirements Activities Activity 3.1: Identifying Data- Related Use Cases and Data Requirements In this activity, students will determine data requirements, ... Discuss use cases, data requirements, and requirements validation as they relate to conceptual design for data systems ! To prepare for the activity • Review the activity and anticipate possible ... investigation process and how it forms the foundation for the development of data requirements The actual investigation process is thoroughly covered in Course 1585: Gathering and Analyzing Business...

Ngày tải lên: 17/01/2014, 09:20