data mining using qualitative information on the web
Future Trends- Fourth Generation (4G) Systems and Beyond
... modulate the second carrier at a frequency exactly l kHz (the symbol rate) higher than the first using the same symbol rate, the mail lobe of the second carrier occurs at a null of the first one Using ... enable the proliferation of banking and electronic payment applications Furthermore, security services will protect the privacy of users’ personal information Location-based services It is envisioned ... of the carriers, which are then demodulated in order to obtain the data words transmitted in each carrier The data words are then combined to produce the original message One can realize from the...
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next generation wireless systems and networks
... mainly on their key technical features Some detail specifications given in the long standard documentations have been omitted for conciseness of the discussions Therefore, the discussions about the ... communication systems The significance of the REAL approach is that it is the first time in the history of the literature that the theory of the validity of the two aforementioned conclusions, telling ... position modulation (PPM) Nevertheless, it must be admitted that the most commonly used SS techniques are the DS and FH, rather than the TH technique The wireless communication systems based on the...
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Next Generation Wireless Systems and Networks pptx
... mainly on their key technical features Some detail specifications given in the long standard documentations have been omitted for conciseness of the discussions Therefore, the discussions about the ... communication systems The significance of the REAL approach is that it is the first time in the history of the literature that the theory of the validity of the two aforementioned conclusions, telling ... position modulation (PPM) Nevertheless, it must be admitted that the most commonly used SS techniques are the DS and FH, rather than the TH technique The wireless communication systems based on the...
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Next Generation Wireless Systems and Networks pot
... mainly on their key technical features Some detail specifications given in the long standard documentations have been omitted for conciseness of the discussions Therefore, the discussions about the ... communication systems The significance of the REAL approach is that it is the first time in the history of the literature that the theory of the validity of the two aforementioned conclusions, telling ... position modulation (PPM) Nevertheless, it must be admitted that the most commonly used SS techniques are the DS and FH, rather than the TH technique The wireless communication systems based on the...
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Next Generation Wireless Systems and Networks potx
... mainly on their key technical features Some detail specifications given in the long standard documentations have been omitted for conciseness of the discussions Therefore, the discussions about the ... communication systems The significance of the REAL approach is that it is the first time in the history of the literature that the theory of the validity of the two aforementioned conclusions, telling ... position modulation (PPM) Nevertheless, it must be admitted that the most commonly used SS techniques are the DS and FH, rather than the TH technique The wireless communication systems based on the...
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ĐỀ TÀI " Historical and Future Trends in Aircraft Performance, Cost, and Emissions " pptx
... stratosphere, NOx emissions from subsonic aircraft tend to increase ozone concentrations The ozone then acts as a greenhouse gas On the other hand, NOx emissions from supersonic aircraft at the higher altitudes ... Civil Aviation Organization (ICAO) the authority to monitor aviation industry’s emissions reduction efforts and seek further options to mitigate the impacts of aviation emissions on local air ... aviation In comparison, the entire transportation sector burns 20 to 25% of the total fossil fuels consumed Thus the aviation sector alone uses 13% of the fossil fuels consumed in 25 transportation,...
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Next generation wireless systems and networks phần 2 pot
... other is noncontiguous The noncontiguous carrier frequencies are common for applications when it is hard to find enough spectrum allocation for the FHSS communications On the other hand, the contiguous ... COMMUNICATIONS 75 information on the code generation procedure and other properties of the OCC, the readers may refer to [206–210] The reason we have paid so much attention to the OCC lies in the fact ... between one-half and twice the data rate prior to DS spreading modulation, depending on the details of the data modulation and the pulse shapes used in shaping the original data pulses The BPSK...
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Next generation wireless systems and networks phần 3 potx
... network connections to improve throughput On the other hand, if necessary, the transport layer might multiplex several transport connections onto the same network connection to reduce the cost The ... words, a program on the source machine carries on a conversation with a similar program on the destination machine, using the message headers and control messages Session layer The session layer is ... CDMA2000 provides the option of using either turbo or convolutional coding on the forward and reverse SCHs Both coding schemes are optional for the base station and the mobile station, and the capability...
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Next generation wireless systems and networks phần 4 potx
... Control Channel MAC Protocol: It governs the transmission by the Access Network and the subsequent reception by the AT of information on the Control Channel The Control Channel packets are constructed ... from the terminal The content of the information carried on the DCH is not visible to the physical layer, and thus higher-layer control information and user data are treated in the same way The ... provides the means to control the ordered activation of the other Session Layer protocols In addition, this protocol ensures the session is still valid and manages closing the session, resulting in the...
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Next generation wireless systems and networks phần 5 ppt
... piconet can contain only two devices; the voice connection is synchronous, and the data connection is asynchronous – taken together, the connection is isochronous Voice transmission is accomplished ... with contention periods under the DCF Another functionality of the MAC sublayer was brought up in the discussion of the asynchronous data transfer service, one of the MAC services This is the fragmentation ... future traffic on the medium based on duration information that is announced in RTS/CTS frames prior to the actual exchange of data The duration information is also available in the MAC headers...
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Next generation wireless systems and networks phần 6 pot
... modulation technique that enables user data to be modulated onto the tones The information is modulated onto a tone by adjusting the tone’s phase, amplitude, or both In the most basic form, a tone ... second code y jointly with those equations specifying its own MI-free condition The solution to these equation sets or the code y must have already satisfied the MAI-free and MI-free conditions The ... definition of reconfiguration signaling between reconfiguration functions and reconfigurable entities is another key point On the basis of the network architectures derived, and the reconfiguration signaling...
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Next generation wireless systems and networks phần 7 ppt
... that the data- carrying modulation in an IR-UWB system is usually PPM, which controls the appearance position of a pulse in a certain duration to represent different data- information On the other ... step–Ordering: the receiver should order all incoming information channels to choose the best to proceed with the detection • Second step–Nulling: the scheme proceeds with the detection using either the ... transmissions, {γk }K , is uniformly distributed over (0, 1) On the basis of these assumpk=1 tions, we can calculate the unconditional expectation of discrete partial cross-correlation functions of the...
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Next generation wireless systems and networks phần 8 docx
... out the tasks for information dispatch The “adaptive synthesizer” works to generate the correct local carrier reference to perform the modulation process and the up-conversion operation To so, the ... selection should be made based on the information obtained from spectrum scanning and IPD Once the secondary link is established, the data link protocols are responsible for maintaining the link connection ... include the selection and combination of detected information, to obtain the information we really want as the output On the other hand, the transmitter module in the cognitive radio scheme, as shown...
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Next generation wireless systems and networks phần 9 pps
... on the sum of two partial aperiodic cross-correlation functions (k) (k) given in the above equation On the other hand, if bj −1 = bj , the value of Ik will depend on the subtraction between the ... is transported on the UL SCH Also, the UE is not yet in a connected mode 416 E-UTRAN: 3GPP’S EVOLUTIONAL PATH TO 4G On the other hand, the mapping in DL concerns the connections between logical ... (for the transfer of control-plane information) and Traffic Channels (for the transfer of user-plane information) MAC Control Channels Control channels are used for the transfer of control-plane information...
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Next generation wireless systems and networks phần 10 pot
... transmissions In International Workshop on UWB Systems, IWUWBS2003, Oulu, Finland, June 2003 [646] W C Stone, Nist Construction Automation Report No 3: Electromagnetic Signal Attenuation in Construction ... application of walsh functions in radio astronomy instrumentation, IEEE Trans Electromagn Comput., vol EMC-20, pp 451–453, 1978 [142] H F Harmuth, Transmission of Information by Orthogonal Functions, ... sequences in CDMA systems, Universal Personal Communications, 1993 Personal Communications: Gateway to the 21st Century Conference Record, 2nd International Conference on, vol 2, pp 970–974, 12–15 October...
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Next generation wireless systems and networks jul 2006 phần 1 pot
... mainly on their key technical features Some detail specifications given in the long standard documentations have been omitted for conciseness of the discussions Therefore, the discussions about the ... communication systems The significance of the REAL approach is that it is the first time in the history of the literature that the theory of the validity of the two aforementioned conclusions, telling ... position modulation (PPM) Nevertheless, it must be admitted that the most commonly used SS techniques are the DS and FH, rather than the TH technique The wireless communication systems based on the...
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Tài liệu Next Generation Mobile Systems 3G and Beyond doc
... base-station transceiver; it is controlled by the RNC and provides physical radio-link connection between the ME and the RNC Similarly, the BSS consists of a Base-station Controller that controls one ... counterparts to the MSC in the CS domain; they maintain the subscription and location information for the mobile stations and handle the user’s packet traffic and the PS domain-related signaling There are ... the locations of the subscribers according to their nearest base station and provides them with a content menu specific to that area The location-estimation accuracy depends on cell size and the...
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Next Generation Mobile Systems 3G and Beyond potx
... base-station transceiver; it is controlled by the RNC and provides physical radio-link connection between the ME and the RNC Similarly, the BSS consists of a Base-station Controller that controls one ... the locations of the subscribers according to their nearest base station and provides them with a content menu specific to that area The location-estimation accuracy depends on cell size and the ... Internet connections provide only a subset of the services available from the Internet The other reason is the difference in bandwidth The bandwidth gap is a legacy of the voice-centric evolution of...
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Next Generation Mobile Systems 3G and Beyond phần 1 doc
... the locations of the subscribers according to their nearest base station and provides them with a content menu specific to that area The location-estimation accuracy depends on cell size and the ... Internet connections provide only a subset of the services available from the Internet The other reason is the difference in bandwidth The bandwidth gap is a legacy of the voice-centric evolution of ... differentiate the existing three generations of wireless networks by their service provision (and this is done in Chapter 1), this is not usually done One of the reasons for this is the networks themselves...
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