high speed radio access for mobile communications

... and 41 %. The highest efficiency is obtained at high mobile speed with high data rate 384 kbps. The fast power control cannot keep the received power level exactly constant at high speed and there ... Wideband CDMA for Third Generation Mobile Communications, Artech House, 1998, 439 [10] Holma, H., ‘A Study of UMTS Terrestrial Radio Access Performance’, Doctoral thesis, Communications ... references for obtaining information on the exact details For Release 5, the High- Speed Downlink Packet Access (HSDPA) presented for FDD in Chapter 11 has been included for TDD as well The

Ngày tải lên: 14/08/2014, 12:21

... applications can be, for example, web browsing, email access or file download. The application performance should preferably be similar to the performance of DSL or WLAN. The application performance depends ... the WCDMA waveform against interference is clearly compromised The performance of high bit rates with WCDMA is presented in Section 12. 4 Both base stations as well as mobiles for. .. provide ... However, these packets must be delivered with a very low delay which sets high require- ments for the network performance. For real time strategy and tur n based strategy games both the requirements

Ngày tải lên: 14/08/2014, 12:21

... partners agreed on joint efforts for the standardisation of UTRA, now standing for Universal Terrestrial Radio Access, as distinct from UTRA (UMTS Terrestrial Radio Access) from ETSI, also submitted ... Mobile Radio Commu- nications, PIMRC’97, Helsinki, Finland, 1–4 September 1997, pp. 42–46. [5] Universal Mobile Telecommunications System (UMTS), Requirements for the UMTS Terrestrial Radio Access ... by the mobile for connection with UTRAN One UE connected to UTRAN has one and only one SRNC WCDMA for UMTS 80 Figure 5.4 Logical role of the RNC for one UE UTRAN.. .Radio Access

Ngày tải lên: 14/08/2014, 12:21

... here For example, the support for spreading factor 512 is not expected to be covered by any of the classes by default For the channel... Int Conf on Personal Indoor and Mobile Radio Communications, ... 6.7 For the convolutional coding, all the classes have the value of 640 bits at an arbitrary time instant for both Table 6.6 Terminal radio access capability parameter combinations for ... converge before the actual data transmission starts. The higher layer downlink signalling to a terminal using uplink CPCH is provided by the Forward Access Channel (FACH). The main reason for not

Ngày tải lên: 14/08/2014, 12:21

... Requirements for capacity - Requirements for quality - Area type /radio propagation... TR 25. 9 95: ‘Measures employed by the UMTS Radio Access Network (UTRAN) to cater for legacy ... handover) Transmitter (mobile) Max mobile transmission power [W] As above in dBm Mobile antenna gain [dBi] Body loss... Cellular Telecommunications System (Phase 2þ); Mobile Radio Interface ... between UE and the other radio access system (e.g GSM/ GPRS), the other radio access system initiates release of the used UTRAN radio resources and UE context information Inter-System

Ngày tải lên: 14/08/2014, 12:21

... best performance is obtaine d for high mobile speeds, while close to the base station, low mobile speeds perform better. This behaviour can be explained by the fact that for high mobile speeds ... It can be observed that the gain is higher at low mobile speeds of 3 km/h and 20 km/h than for 120 km/h. The reason is that for high mobile speeds the link performance benefits from time Polarisation ... receivers or equalisers in the mobile. Such receivers are discussed in Chapter 11 for High Speed Downlink Packet Access, HSDPA. The effect of the mobile speed on downlink performance in the Pedestrian

Ngày tải lên: 14/08/2014, 12:21

... 0-470-84622-4 (Electronic) MULTIPLE ACCESS PROTOCOLS FOR MOBILE COMMUNICATIONS Multiple Access Protocols for Mobile Communications GPRS, UMTS and Beyond Alex Brand Swisscom Mobile, Switzerland Hamid Aghvami ... GPRS Models for the Physical Layer and for User Traffic Generation 5.1 How to Account for the Physical Layer? 5.1.1 What to Account For and How? 5.1.2 Using Approximations for Error Performance ... Multiple Access Schemes 1.4.3 Literature on Multiple Access Protocols for Packet CDMA 1.4.4 Access Control in Combined CDMA/PRMA Protocols 1.4.5 Summary 1 6 10 12 12 14 15 15 21 Cellular Mobile

Ngày tải lên: 20/04/2023, 09:32

... compression rate for video signal CBR and VBR stand for constant bit rate and variable bit rate, respectively SIF stands for source input format HalfD1 stands for video size of 352 × 480 pixels for one ... Japan, under the domestic radio regulations, wireless LAN is the only radio equipment with a hightransmission rate permitted to be used without any radiorelated licenses for the operation This allows ... current Japanese regulation for EIRP, (b) an attenuator used with a higher gain antenna DEVELOPMENT OF LONG-RANGE AND HIGH- SPEED WIRELESS LAN UNITS Most of the information provided in this paper

Ngày tải lên: 22/06/2014, 06:20

... file(s) for the desired device(s) (for example, PIC18F6520.PIC) To generate information for more than one device, hold down as you select the second and subsequent PIC file names, before clicking ... file(s) for the desired device(s) (for example, PIC18F6520.PIC) To generate information for more than one device, hold down as you select the second and subsequent PIC file names, before ... Bootloader mode could be erronenously entered High- Speed Baud Rates The bootloader is capable of operating at baud rates of up to Mbps Reliably achieving high- speed baud rates requires some considerations

Ngày tải lên: 11/01/2016, 16:55

... positive development, which makes high- speed rail (HSR) system more attractive as an alternative to other modes of transportation for long distance travel Due to the high speed of train moving over ... possibility for the occurrence of the phenomenon when the speed of train is high As to be expected, when the track is nearly smooth, jumping wheel is unlikely to occur even at very high train speed ... FUDAN UNIVERSITY on 05/07/15 For personal use only Analysis of High- Speed Rail Fig Effect of foundation stiffness ratio on contact force transition of stiffness ratio For a larger stiffness ratio

Ngày tải lên: 16/12/2017, 04:55

... result of high- speed synchronous control of X-axis:  Stroke graph:  Speed graph: Figure 4.48: The line chart illustrate the high speed synchronous control of X-Axis Figure 4.49: Actual speed of ... result of high- speed synchronous control of Y-axis:  Stroke graph:  Speed graph: Figure 4.50: The line chart illustrate the high- speed synchronous control of Y-Axis Figure 4.51: Actual speed of ... TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING GRADUATION PROJECT ELECTRONICS AND ELECTRONIC ENGINEERING TECHNOLOGY DESIGN THE HIGH- SPEED CONTROL SYSTEM FOR THE SYNCHRONIZATION BETWEEN

Ngày tải lên: 28/12/2023, 18:51

... capability for future high speed and flexible optical communications at low cost [1–11] Wireless optical link can also offer a secure and a promising alternative to radio communications for wireless ... BER performance, the proposed system can be used in joint with a high- resolution imaging angle diversity receiver power uniformity of the transmitter has yet to be optimized For high performance ... cited For future high speed indoor wireless communication, diffuse wireless optical communications offer more robust optical links against shadowing than line-of-sight links However, their performance

Ngày tải lên: 21/06/2014, 17:20

... 61, and 63 for constraint lengths 7, 8, 9, and 10, respectively. For our FPGA prototype, due to A Novel High- Speed Configurable Viterbi Decoder for Broadband Access 1323 Table 10: Data format in ... overall performance. 6. CONCLUSIONS Broadband access raises new demands for channel coding. Besides higher decoding speed and decoding capability, re- configurable decoding performance is highly desired, ... best possible decoding through- put rate for the area-efficient architecture with 8 ACS in A Novel High- Speed Configurable Viterbi Decoder for Broadband Access 1325 Table 12: Throughput rate and

Ngày tải lên: 23/06/2014, 01:20

... parameters and radio access requirements for WiBro system WiBro adopts OFDMA/TDD for multiple -access and duplex schemes, and aims to provide a high data rate wireless Internet access with ... broadband access standard called WiMax (Worldwide Interoperability for Microwave Access) Formed in April 2001 to promote conformance and interoperability of the standard IEEE 802.16, the WiMax Forum ... we discuss the aforesaid mobile communication generations in detail and describe the services and applications suitable for mobile communication systems 2 EVOLUTION OF MOBILE COMMUNICATION

Ngày tải lên: 27/06/2014, 09:20

... to the application of beamforming... (WiMax, Mobile WiMax/WiBro), • 802.20 Mobile Broadband Wireless Access (suspended until 1 October 2006), etc For more information about IEEE and 802 ... of 3G mobile systems See http://www.etsi.org/ for detailed information • ARIB (The Association of Radio Industries and Businesses) was chartered by the Minister of Posts and Telecommunications ... we discuss the aforesaid mobile communication generations in detail and describe the services and applications suitable for mobile communication systems 2 EVOLUTION OF MOBILE COMMUNICATION

Ngày tải lên: 07/08/2014, 21:20

... necessary for IMT-Advanced to have different radio interfaces and frequency bands for mobile access for highly mobile users and for new nomadic/local area wireless access One ... MHz Multiple Access OFDMA/TDD OFDMA/FDD, TDD;SC-FDMA, OFDMA/FDD, TDD OFDMA, MC-CDMA, ??? Service Portable Internet/ High- speed Wireless Internet High- speed mobile service High- speed mobile service ... parameters and radio access requirements for WiBro system. WiBro adopts OFDMA/TDD for multiple -access and duplex schemes, and aims to provide a high data rate wireless Internet access with PSS

Ngày tải lên: 07/08/2014, 21:20

... wk = ⎧ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩ H ∗ k for MRC H ∗ k   Hk  2 for ZF H ∗ k   Hk  for EGC H ∗ k   Hk  2 +  C SF E s N 0  −1  for MMSE where E s /N 0 (=E c SF/N 0  is ... Similar to ISI cancellation for MC-CDMA, ICI cancellation for SC-CDMA can be carried out either in the time-domain or in the frequency-domain after performing MMSE-FDE. For the frequency-domain ... obtained in SC-CDMA Therefore, 2D block spread SC-CDMA provides much better BER performance than MC-CDMA 8 HYBRID... 1) The LLR values are computed for c = 0 ∼ C − 1 and for all the bits in the

Ngày tải lên: 07/08/2014, 21:20

... America. WCDMA radio access has evolved strongly alongside high- speed downlink packet access (HSDPA) and high- speed uplink packet access (HSUPA), together called high- speed packet access (HSPA). ... High- Speed Downlink Packet Access HSPA High- Speed Packet Access HSUPA High- Speed Uplink Packet Access Abbreviations xvii Higher cell capacity and higher spectral efficiency are required to provide higher ... High- Speed Dedicated Physical Control CHannel HS-DSCH High- Speed Downlink Shared CHannel HS-PDSCH High- Speed Physical Downlink Shared CHannel HS-SCCH High- Speed Shared Control CHannel HSDPA High- Speed...

Ngày tải lên: 01/06/2014, 09:38

... WCDMA FOR UMTS Radio Access for Third Generation Mobile Communications Third Edition Edited by Harri Holma and Antti Toskala Both ... depicts packet access and presents the performance of packet protocols of WCDMA. Chapter 11 presents the significant Release 5 feature, High- Speed Downlink Packet Access, HSDPA, and its perform ance. ... all-IP 10 WCDMA for UMTS guidelines for radio network dimensioning, gives an example of detailed capacity and coverage planning, and covers GSM co-planning. Chapter 9 covers the radio resource management...

Ngày tải lên: 03/06/2014, 01:37

... Multiple Access RAN Radio Access Network RAP Random Access Protocol RCMA Reservation-Code Multiple Access RES Reservation State RF Radio Frequency RHS Right Hand Side (of an equation) RLC Radio ... (EGPRS) M MAC Medium Access Control MAHO Mobile Assisted Handover MA Mobile Allocation (of radio frequency channels) in GSM MAI Multiple Access Interference MAIO Mobile Allocation Index Offset (for frequency ... detail. Multiple Access Protocols for Mobile Communications GPRS, UMTS and Beyond Alex Brand Swisscom Mobile, Switzerland Hamid Aghvami King’s College London, UK SYMBOLS A[t] Slots available for contention...

Ngày tải lên: 02/03/2013, 16:59