web intelligence techniques and applications

... market of 2010 and beyond, there is time for 4G research and standards development So far, no 4G standard has been defined and only speculations have been made regarding the structure and operation ... vision of 4G and future mobile and wireless systems Such systems target the market of 2010 and beyond, aiming to offer support to mobile applications demanding data rates of 50 Mbps and beyond ... straightforward and have been identified during 2G and 3G research and development stages Other issues are not so clear and are dependent on the evolution of the telecommunications market and society...

Ngày tải lên: 29/09/2013, 21:20

... WPAN Standards 4.4.1 IEEE 802.15.3a Standard 4.4.2 IEEE 802.15.4 Standard IEEE 802.16 WMAN Standards ETSI HIPERLAN and ETSI HIPERLAN/2 Standards ... of other ways) and σ is the standard deviation of the path loss It is noted that the variable σ is usually a function of terrain and antenna heights, and so on 2.1.3 Narrowband and Frequency-Domain ... 2.1.3 Narrowband and Frequency-Domain Characteristics 2.1.4 Wideband and Time-Domain Characteristics 2.2 Spread Spectrum Techniques ...

Ngày tải lên: 03/06/2014, 01:05

... WPAN Standards 4.4.1 IEEE 802.15.3a Standard 4.4.2 IEEE 802.15.4 Standard IEEE 802.16 WMAN Standards ETSI HIPERLAN and ETSI HIPERLAN/2 Standards ... of other ways) and σ is the standard deviation of the path loss It is noted that the variable σ is usually a function of terrain and antenna heights, and so on 2.1.3 Narrowband and Frequency-Domain ... 2.1.3 Narrowband and Frequency-Domain Characteristics 2.1.4 Wideband and Time-Domain Characteristics 2.2 Spread Spectrum Techniques ...

Ngày tải lên: 27/06/2014, 14:20

... WPAN Standards 4.4.1 IEEE 802.15.3a Standard 4.4.2 IEEE 802.15.4 Standard IEEE 802.16 WMAN Standards ETSI HIPERLAN and ETSI HIPERLAN/2 Standards ... of other ways) and σ is the standard deviation of the path loss It is noted that the variable σ is usually a function of terrain and antenna heights, and so on 2.1.3 Narrowband and Frequency-Domain ... 2.1.3 Narrowband and Frequency-Domain Characteristics 2.1.4 Wideband and Time-Domain Characteristics 2.2 Spread Spectrum Techniques ...

Ngày tải lên: 27/06/2014, 14:20

... WPAN Standards 4.4.1 IEEE 802.15.3a Standard 4.4.2 IEEE 802.15.4 Standard IEEE 802.16 WMAN Standards ETSI HIPERLAN and ETSI HIPERLAN/2 Standards ... of other ways) and σ is the standard deviation of the path loss It is noted that the variable σ is usually a function of terrain and antenna heights, and so on 2.1.3 Narrowband and Frequency-Domain ... 2.1.3 Narrowband and Frequency-Domain Characteristics 2.1.4 Wideband and Time-Domain Characteristics 2.2 Spread Spectrum Techniques ...

Ngày tải lên: 27/06/2014, 14:20

... Performance and Cost …………………………………………….77 5.2.1 Parameter Development ……………………………………………………77 5.2.1.1 Fuel consumption and direct operating cost and price …………… 78 5.2.1.2 Aircraft usage and size and ... develop Standards and Recommended Practices regarding all aspects of aviation, including certification standards for emissions and noise Since 1977, ICAO has promulgated international emissions and ... regulation standards ICAO subsequently developed International Standard and Recommended Practices for the control of fuel venting and of emissions of carbon monoxide, hydrocarbons, nitrogen oxides and...

Ngày tải lên: 28/06/2014, 02:20

... power bandwidth Similarly, we can also define other percentage power bandwidths, such as 90 percentage power bandwidth, 50 percentage power bandwidth, and so on After having defined the signal bandwidth, ... mainly by the applications of the then emerging communication systems and services, such as long-haul microwave relay systems, satellite, and terrestrial land mobile communications, and so on Before ... the bandwidth of the sent information itself An SS system, however, often takes a baseband signal (e.g., a voice channel) with a bandwidth of only a few kilohertz, and distributes it over a band...

Ngày tải lên: 09/08/2014, 19:22

... Illustration of uplink and downlink pilot frames for an OCC-CDMA system, where Td1 and Td2 denote downlink pilot burst duration and repeating period, respectively; and Tu1 and Tu2 stand for the uplink ... duration and repeating period being Td1 and Td2 , respectively; and the uplink channel adopts interleaving data signal with the pilot bursts, whose duration and repeating period are Tu1 and Tu2 ... between the mobile user and the MSC, and the PSTN dedicates a voice circuit between the MSC and the end-user As calls are initiated and completed, different radio circuits and dedicated PSTN voice...

Ngày tải lên: 09/08/2014, 19:22

... frequency band; (2) At a handoff boundary and between frequency bands (assuming the mobile station has multiband capability); (3) Within the same cell footprint and within a single frequency band; and ... that the handoffs could happen in the following different scenarios: (1) At a handoff boundary and within a single frequency band; (2) At a handoff boundary and between frequency bands (assuming ... types and 11 influence the procedure There are three types of handovers specified in UMTS (1) Intrafrequency handovers; (2) Interfrequency handovers; and (3) InterRAT handovers, where RAT stands...

Ngày tải lên: 09/08/2014, 19:22

... baton handover concept, the system will support both intrafrequency and interfrequency (in the TD-SCDMA system) handovers, and give higher accuracy and a shorter handover time period for handovers ... scientific, and medical use, and these became known as the ISM bands; they are: (1) 902–928 MHz, a bandwidth of 26 MHz; (2) 2.4–2.4835 GHz, a bandwidth of 83.5 MHz, commonly called the 2.4-GHz band ; and ... both handsets and base stations The success of the Baton Handover relies heavily on the accuracy in mobile positioning techniques provided by smart antenna, making it necessary to handle all handovers...

Ngày tải lên: 09/08/2014, 19:22

... higher data throughput and support for a great number of users will result in a shift to higher and less-congested frequency bands, for example the 5-GHz band, and wider bandwidths (20–100 MHz) ... each have their own range, data rate, and mobility limits Many useful and interesting services and applications can be developed, assuming that ubiquitous and high-speed B3G wireless access is ... functions, and limited network and systems coordination This has led to a proliferation of standards that provide similar functions – wireless LAN standards (e.g., Wi-Fi/802.11, Bluetooth) and cellular...

Ngày tải lên: 09/08/2014, 19:22

... indoor and outdoor UWB communications applications Figure 7.20 Other communications applications in the vicinity of UWB operating bands isotropic radiated power (EIRP) of −41.3 dBm per MHz, and ... controller, and a pseudorandom sequences generator Obviously, in such a TH-UWB system, the data is sent in bursts and transmission time is controlled by the pseudorandom sequences generator Understandably, ... channel, s(t) and y(t) are the input and output signals observed at the transmitter antenna and the receiver MR antenna (b) The SIMO model, where s(t) and {yi (t)}i=1 are the input and output signals...

Ngày tải lên: 09/08/2014, 19:22

... in the same band (such as GPS, radar and satellite systems, and so on.), and the other being the mutual interference among unlicensed users (such as WLANs and Bluetooth devices, and so on.) The ... office-in-the-vehicle and Internet connectivity for Public Safety and Transportation needs; drop -and- insert and frame video capabilities are perfectly suited for Homeland Security, Disaster Response, and Military ... responsible for the development and harmonization of the UMTS UTRA series standards (such as the WCDMA standard and the TD-SCDMA standard, etc.), as discussed in Sections 3.2 and 3.3 As discussed in...

Ngày tải lên: 09/08/2014, 19:22

... km/h depending on the frequency band The E-UTRAN should also support techniques and mechanisms to optimize delay and packet loss during intrasystem handovers Voice and other real-time services supported ... Radio Band Resources (as well as power, adaptive scheduling, etc.) in same as well as different bands, in both UL and DL, and in both adjacent and nonadjacent channel arrangements A “Radio Band ... (E.1) where cx,m (n) and cy,m (n) are column vectors, and x and y are the flock indexes k defined in Tables 7.2 and 7.3, and chip index is n, n∈(1,N) The in-phase auto-correlation and cross-correlation...

Ngày tải lên: 09/08/2014, 19:22

... Wideband Systems and Technologies, May 2002 [667] I Maravic, M Vetterli, and K Ramchandran, Channel estimation and synchronization with sub-Nyquist sampling and application to ultra-wideband systems ... Ultra-Wideband Radar Systems, CRC Press, 1995 [606] X Li, Super-Resolution to a Estimation with Diversity Techniques for Indoor Geolocation Applications PhD thesis, 2003 [607] K Y Yazdandoost and R ... Kohno, Y Hase, S Oomori, and F Takahashi, Comparison of ultra-wideband (UWB) impulse radio with DS-CDMA and FH-CDMA In Proceedings of 24th Symposium on Information Theory and Applications (SITA),...

Ngày tải lên: 09/08/2014, 19:22

... WPAN Standards 4.4.1 IEEE 802.15.3a Standard 4.4.2 IEEE 802.15.4 Standard IEEE 802.16 WMAN Standards ETSI HIPERLAN and ETSI HIPERLAN/2 Standards ... of other ways) and σ is the standard deviation of the path loss It is noted that the variable σ is usually a function of terrain and antenna heights, and so on 2.1.3 Narrowband and Frequency-Domain ... 2.1.3 Narrowband and Frequency-Domain Characteristics 2.1.4 Wideband and Time-Domain Characteristics 2.2 Spread Spectrum Techniques ...

Ngày tải lên: 14/08/2014, 12:21

... networks fostered e-mail and web- browsing applications Wideband Internet connectivity realized in 3G networks is now fostering multimedia applications and Java-download applications In the next ... transactions, send and receive e-mail, play games, obtain weather reports and access the worldwide web The current cell-phone’s web- browsing capability offers access to a wide and growing array of websites ... Messages – SOAP and its Extensions 9.3.4 Web Services Discovery (UDDI) 9.3.5 Web Services Description (WSDL) 9.3.6 Web Services Execution and Process 9.3.7 J2ME Web Services...

Ngày tải lên: 20/01/2014, 06:20

... networks fostered e-mail and web- browsing applications Wideband Internet connectivity realized in 3G networks is now fostering multimedia applications and Java-download applications In the next ... transactions, send and receive e-mail, play games, obtain weather reports and access the worldwide web The current cell-phone’s web- browsing capability offers access to a wide and growing array of websites ... Messages – SOAP and its Extensions 9.3.4 Web Services Discovery (UDDI) 9.3.5 Web Services Description (WSDL) 9.3.6 Web Services Execution and Process 9.3.7 J2ME Web Services...

Ngày tải lên: 27/06/2014, 14:20

... networks fostered e-mail and web- browsing applications Wideband Internet connectivity realized in 3G networks is now fostering multimedia applications and Java-download applications In the next ... transactions, send and receive e-mail, play games, obtain weather reports and access the worldwide web The current cell-phone’s web- browsing capability offers access to a wide and growing array of websites ... Messages – SOAP and its Extensions 9.3.4 Web Services Discovery (UDDI) 9.3.5 Web Services Description (WSDL) 9.3.6 Web Services Execution and Process 9.3.7 J2ME Web Services...

Ngày tải lên: 14/08/2014, 09:21