a customer analysis based methodology for improving web business systems
Future Trends- Fourth Generation (4G) Systems and Beyond
Ngày tải lên :
29/09/2013, 21:20
... the major applications foreseen in 4G and future systems † Information access This class will call for the ability of instantaneous access to large volumes of data such as large video and audio ... Companies that enjoy a big market share will probably establish their own de facto standards bypassing standards developments organizations This means that the significance of such organizations ... obtain the data words transmitted in each carrier The data words are then combined to produce the original message One can realize from the above discussion that before OFDM modulation the data...
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next generation wireless systems and networks
Ngày tải lên :
03/06/2014, 01:05
... The major difference between a traditional single-carrier CDMA and MC-CDMA systems lies in the fact that the latter can take the advantage of transmitting multiple data streams in parallel via different ... spreading and carrier modulation schemes13 , and so on In particular, we introduce a new CDMA code design approach, namely, the Real Environment Adaptation Linearization (REAL) approach, as an effort ... Population in 2005 Penetration rate (%) World percentage (%) United States China Japan Germany India United Kingdom South Korea Italy France Brazil Russia Canada Spain Indonesia Mexico Taiwan Australia...
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Next Generation Wireless Systems and Networks pptx
Ngày tải lên :
27/06/2014, 14:20
... The major difference between a traditional single-carrier CDMA and MC-CDMA systems lies in the fact that the latter can take the advantage of transmitting multiple data streams in parallel via different ... spreading and carrier modulation schemes13 , and so on In particular, we introduce a new CDMA code design approach, namely, the Real Environment Adaptation Linearization (REAL) approach, as an effort ... their father for not being able to play with them on weekends and holidays Mohsen Guizani would like to thank his wife Saida and his children, Nadra, Fatma, Maher, Zainab, Sara, and Safa for their...
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Next Generation Wireless Systems and Networks pot
Ngày tải lên :
27/06/2014, 14:20
... The major difference between a traditional single-carrier CDMA and MC-CDMA systems lies in the fact that the latter can take the advantage of transmitting multiple data streams in parallel via different ... spreading and carrier modulation schemes13 , and so on In particular, we introduce a new CDMA code design approach, namely, the Real Environment Adaptation Linearization (REAL) approach, as an effort ... their father for not being able to play with them on weekends and holidays Mohsen Guizani would like to thank his wife Saida and his children, Nadra, Fatma, Maher, Zainab, Sara, and Safa for their...
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Next Generation Wireless Systems and Networks potx
Ngày tải lên :
27/06/2014, 14:20
... The major difference between a traditional single-carrier CDMA and MC-CDMA systems lies in the fact that the latter can take the advantage of transmitting multiple data streams in parallel via different ... spreading and carrier modulation schemes13 , and so on In particular, we introduce a new CDMA code design approach, namely, the Real Environment Adaptation Linearization (REAL) approach, as an effort ... their father for not being able to play with them on weekends and holidays Mohsen Guizani would like to thank his wife Saida and his children, Nadra, Fatma, Maher, Zainab, Sara, and Safa for their...
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ĐỀ TÀI " Historical and Future Trends in Aircraft Performance, Cost, and Emissions " pptx
Ngày tải lên :
28/06/2014, 02:20
... wing, an average SFC value of all available engines is used for each planform The aerodynamic database is obtained from NASA studies (Bushnell, 1998) and calculated, when unavailable, using NASA Aircraft ... for which aircraft stays in the air ASE Aviation system efficiency ASM Available seat miles ATM Air traffic management, or available ton miles Block Hours Time duration for which aircraft leaves ... costs of aircraft systems, the key parameters in aircraft performance and cost are identified, and a parametric modeling framework is formulated for further study 3.2 Databases Aircraft technology,...
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Next generation wireless systems and networks phần 2 pot
Ngày tải lên :
09/08/2014, 19:22
... applications, the ratio between x the chip rate and original data information rate can also be used as the PG Therefore, for a DSSS system having a 10 Mcps chip rate and a kbps information rate the PG ... the smallest interval to make a decision at a receiver is also reduced, leaving a result that the hardware and software have to catch up with the data rate to make a sensible decision for each ... external jamming For instance, if a maximal 10-MHz bandwidth is available, the PG possible is also limited by that 10 MHz Several practical approaches are available in choosing the proper bandwidth...
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Next generation wireless systems and networks phần 3 potx
Ngày tải lên :
09/08/2014, 19:22
... Transport layer Data Network layer Data DT DH Application layer Session layer Data TH NH Data PH SH Data Receiver Data Data link layer Bit stream Physical layer Actual data transmisssion path Figure ... signaling load that would be associated with a full frame format parameter negotiation, CDMA2000 specifies a set of channel configurations It defines a spreading rate and an associated set of frames ... Access Channel Broadcast Control Channel Forward Packet Date Channel Forward Packet Data Control Channel Reverse Acknowledgment Channel Reverse Channel Quality Indicator Channel Forward Acknowledgment...
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Next generation wireless systems and networks phần 4 potx
Ngày tải lên :
09/08/2014, 19:22
... lic Australia No coverage obligations Austria CDMA2000 & WCDMA WCDMA Belgium WCDMA Brazil CDMA2000 & WCDMA CDMA2000 & WCDMA NA NA Denmark CDMA2000 & WCDMA WCDMA Finland WCDMA France WCDMA (+1 ... in major air interface parameters for UMTS UTRA-FDD, UMTS UTRA-TDD and TD-SCDMA systems Table 3.15 gives major system parameters for UMTS WCDMA and CDMA2000 systems Table 3.16 makes a comparison ... telecommunications standards bodies, which are known as Organizational Partners The current organizational partners are ARIB (Japan) and TTC (Japan), CCSA (China), ETSI (Europe), T1 (United States of America)...
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Next generation wireless systems and networks phần 5 ppt
Ngày tải lên :
09/08/2014, 19:22
... [457] The attacker picks as his target a STA that is already associated with a legitimate AP, and sets up a false AP with the same SSID and MAC address as a genuine AP on the network within range ... deauthentication message, and the victim STA associates with the attacker’s false AP The false AP immediately associates with a valid AP, forwarding all traffic, and proceeds to authenticate Now all messages ... STA A receives a Class frame with a unicast address in the Address field from STA B that is not authenticated with STA A, STA A should send a deauthentication frame to STA B If STA A receives a...
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Next generation wireless systems and networks phần 6 pot
Ngày tải lên :
09/08/2014, 19:22
... or QAM is typically employed An OFDM system takes a data stream and splits it into M parallel data streams, each at a rate 1/M of the original rate Each stream is then mapped to a tone at a unique ... traditional DS-CDMA system, and thus a substantial gain in bandwidth efficiency can be achieved Unfortunately, all unitary codes, such as Gold, Kasami, Walsh-Hadamard, OVSF codes, and so on, are ... true For instance, the channelization codes used in WCDMA and TD-SCDMA standards are Orthogonal Variable Spreading Factor (OVSF) codes, which is, in fact, exactly the same as the Walsh-Hadamard...
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Next generation wireless systems and networks phần 7 ppt
Ngày tải lên :
09/08/2014, 19:22
... analytical treatment of code-dependent analysis of an STBC-CDMA system under MAI and flat Rayleigh fading The comparison is also made among the STBC-CDMA systems using both analysis and simulation ... demonstrate a BER performance analysis that is associated with the characteristic feature of UWB pulse waveforms We give a unified approach to derive a closed form BER expression by taking into account ... investigated The performance of such communication systems in an AWGN channel in terms of multiple access capability, error rate performance, and achievable transmission rate were evaluated without...
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Next generation wireless systems and networks phần 8 docx
Ngày tải lên :
09/08/2014, 19:22
... parameters used in the above DFS algorithm can be explained as follows: To obtain “radar antenna gain” (GRadar ), we need to know the azimuth and elevation antenna pattern models for the radar ... stations associated with an AP cannot exceed the maximum limit that the AP sets When a WLAN station associates with an AP, the station indicates its transmit power capability The AP uses this data about ... 8.7.2 Arbitrary Number of Transmitter Antennae Similarly, the above analysis for a two-antenna OC code based STBC-CDMA system can be extended to the cases with nt transmitter antennae at each user,...
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Next generation wireless systems and networks phần 9 pps
Ngày tải lên :
09/08/2014, 19:22
... in same as well as different bands, in both UL and DL, and in both adjacent and nonadjacent channel arrangements A “Radio Band Resource” is defined as an all spectrum available to an operator ... note that, as a packet -based data service in WCDMA DL with data transmission up to 8–10 Mbps (and 20 Mbps for MIMO systems) , HSDPA also operates over a MHz bandwidth in WCDMA DL Unlike standard ... Kingdom and France In such a case, a special scenario applies for issues such as mobility solutions and channel models For the physical layer parameterizations, E-UTRAN should be able to maintain...
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Next generation wireless systems and networks phần 10 pot
Ngày tải lên :
09/08/2014, 19:22
... hopper analysis, Magnavox Research Laboratories, STN-29, August 1966 [273] A Kaplan, Detection and analysis of frequency hopping radar signals, Sylvania Elect Syst., W.D.L Mountain View, California ... H Muramatsu M Harada, T Yamazato, H Okada, and M Katayama, Effect of Nonlinear Amplifiers of Transmitters in Multicarrier CDMA Systems, IEICE Trans Fundam., vol J85 -A, no 3, pp 340;V48, Mar 2002 ... S Suwa, H Atarashi, and M Sawahashi, Performance comparison between MC/DS-CDMA and MCCDMA for reverse link broadband packet wireless access, Proceedings of VTC- 2002 Fall, Vancouver, Canada, pp...
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Next generation wireless systems and networks jul 2006 phần 1 pot
Ngày tải lên :
14/08/2014, 12:21
... The major difference between a traditional single-carrier CDMA and MC-CDMA systems lies in the fact that the latter can take the advantage of transmitting multiple data streams in parallel via different ... spreading and carrier modulation schemes13 , and so on In particular, we introduce a new CDMA code design approach, namely, the Real Environment Adaptation Linearization (REAL) approach, as an effort ... Population in 2005 Penetration rate (%) World percentage (%) United States China Japan Germany India United Kingdom South Korea Italy France Brazil Russia Canada Spain Indonesia Mexico Taiwan Australia...
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Tài liệu Next Generation Mobile Systems 3G and Beyond doc
Ngày tải lên :
20/01/2014, 06:20
... Toshiro Kawahara, James Kempf, Khosrow Lashkari, Ged Powell, Zulfikar Ramzan, Manuel Roman, Muhammad Mukarram Bin Tariq, Fujio Watanabe, Dong Zhou, 181 Metro Drive, Suite 300, San Jose, California 95110, ... location areas (LA), which are used for locating the user for CS traffic; each is served by a VLR, and a VLR may serve several LA The routing areas (RA) are used for locating the user for PS traffic; ... and authorization, admission control, charging and data collection, radio resource management, packet bearer creation and maintenance, address mapping and translation, routing and mobility management...
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Next Generation Mobile Systems 3G and Beyond potx
Ngày tải lên :
27/06/2014, 14:20
... routing areas (RA) are used for locating the user for PS traffic; one or more RAs are managed by a SSGN The UTRAN Registration Area (URA) are smaller than the RA, and cells are the smallest unit ... approach also has serious implications for e-mail All e-mail transactions to the Internet are relayed by the WAP gateway and are handled as SMS transactions (with the attendant charges) The same is ... user’s data traffic, including functions such as initial authentication and authorization, admission control, charging and data collection, radio resource management, packet bearer creation and maintenance,...
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Next Generation Mobile Systems 3G and Beyond phần 1 doc
Ngày tải lên :
14/08/2014, 09:21
... Toshiro Kawahara, James Kempf, Khosrow Lashkari, Ged Powell, Zulfikar Ramzan, Manuel Roman, Muhammad Mukarram Bin Tariq, Fujio Watanabe, Dong Zhou, 181 Metro Drive, Suite 300, San Jose, California 95110, ... by triangulating on its signal This higher resolution information will facilitate newer services Java Application: Users now can download and store a variety of dynamic applications via 2G and ... is clearly not seamless and under certain conditions can be blocked by the gateway The WAP approach also has serious implications for e-mail All e-mail transactions to the Internet are relayed...
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