Essays about: "WCDMA"

Showing result 21 - 25 of 56 essays containing the word WCDMA.

  1. 21. UMTS Positioning Methods and Accuracy in Urban Environments

    University essay from Kommunikations- och transportsystem; Tekniska högskolan

    Author : Yasir Ali Baloch; [2011]
    Keywords : UMTS network; Mobile Positoining; Database Correlation Method; Location Accuracy;

    Abstract : During the 2nd generation Global System for Mobile Communications (GSM) mobile communication, the focus of the mobile positioning was mostly on call setup and messaging. But the evolution of the 3rd generation Wideband Code Division Multiple Access (WCDMA) has changed the focus of mobile positioning. READ MORE

  3. 22. COEXISTENCE OF WLAN AND WWAN IN A NOTEBOOK

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Emmanuel Olusegun Owolabi; Vivien Ibironke Ibiyemi; [2011]
    Keywords : RADIO ACCESS; INTERFERENCE; COUPLING; COEXISTENCE;

    Abstract : A modern notebook can be equipped with several devices of wireless network access technologies, such as Wireless Local Area Network (WLAN), Wireles Wide Area Network (WWAN), Wireless Personal Area Network (WPAN), and radio based navigation systems, such as GNSS (Global Navigation Satellite System). Future mobile devices will have different radio technologies such as Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA) and WLAN transceivers co-existing on the same module that enables such a device to connect to the different radio technologies. READ MORE

  4. 23. Hybrid Power Control in Time Division Scheduling Wideband Code Division Multiplex Access

    University essay from KTH/Kommunikationssystem, CoS

    Author : Zhuo Cheng; [2011]
    Keywords : WCDMA; High-Speed Uplink Packet Access; Power Control; unused code GRAKE;

    Abstract : With high date rates using Enhanced Uplink (EUL), a conventional signal to interference ratio (SIR) based power control algorithm may lead to a power rush due to self interference or incompatible SIR target [2]. Time division (TD) scheduling in Wideband Code Division Multiplex Access (WCDMA) is considered to be a key feature in achieving high user data rates. READ MORE

  5. 24. Energy Efficiency in Wireless Networks : Impact of Adaptive Radio Unit Activation

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Mozhgan Hedayati; [2010]
    Keywords : energy efficiency; sleep mode; energy saving; energy consumption; mobile network; cellular network; LTE; E-UTRAN;

    Abstract : Energy consumption in mobile networks, e.g. 3G networks, may be a substantial part of an operator's expenses. A large part of the total energy of the network is consumed by the radio access network. READ MORE

  6. 25. Low-Power Low-Noise IQ Modulator Designs in 90nm CMOS for GSM/EDGE/WCDMA/LTE

    University essay from Institutionen för systemteknik

    Author : Mattias Johansson; Jonas Ehrs; [2010]
    Keywords : RF; ASIC; Analog Integrated Circuit; IQ Modulator; IQM; CMOS; 90nm; Predistortion; Mixer; Envelope Tracking; Direct Conversion;

    Abstract : The current consumption of the IQ modulator is a significant part of the totalcurrent consumption of a mobile transmitter platform and reducing it is of greatinterest. Also, as the WCDMA/LTE standards specifies full duplex transmissionsand Tx and Rx are most often using the same antenna, it is crucial to have asolution with low noise generation. READ MORE