Essays about: "Peak to Average Power Ratio"

Showing result 16 - 20 of 27 essays containing the words Peak to Average Power Ratio.

  1. 16. Design and Implementation of as Asymmetric Doherty Power Amplifier at 2.65 GHz in GaN HEMT Technology

    University essay from Elektroniska komponenter; Tekniska högskolan

    Author : Mohsin Mumtaz Tarar; [2011]
    Keywords : Asymmetric Doherty Power amplifier;

    Abstract : Power amplifiers are an indispensible part of the wireless communication systems. Conventional PAs provide peak efficiency at peak output power which is obtained at a certain fixed optimum resistance. These kind of amplifiers are normally called switched-mode power amplifiers (SMPAs) and are used for constant envelope signals. READ MORE

  3. 17. Smart Antenna - MIMO, OFDM and Single Carrier FDMA for LTE.

    University essay from Linnéuniversitetet/Institutionen för datavetenskap, fysik och matematik, DFM

    Author : Haris Majeed; Rahim Umar; Arslan Ali Basit; [2011]
    Keywords : MIMO; OFDM; SC-FDMA; Smart Antenna Beamforming.;

    Abstract : With the evolution in the telecommunication generations, more and more research is going on in the field of wireless communications. The purpose of these researches has always been to provide good network coverage across the region with higher data rates, accuracy and better performance. READ MORE

  4. 18. PEAK TO AVERAGE POWER RATIO (PAPR) REDUCTION IN OFDM BASED RADIO SYSTEMS

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Mohammad Zavid Parvez; Md. Abdullah Al Baki; [2010]
    Keywords : OFDM; NC-OFDM; PAPR; Cognitive Radio; SDR; Spectrum sensing;

    Abstract : High data rate wireless access is demanded by many applications. Usually, more bandwidth is required for higher data rate transmission in any of the system. With promising technology and ever-increasing wireless devices, the spectrum is becoming scarcer day by day. READ MORE

  5. 19. 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

  6. 20. Performance Evaluation of Uplink Multiple Access Techniques in LTE Mobile Communication System

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Ashraf AwadElkarim Widaa Ahmed; Ahmed Hamza Ibrahim Makki; [2010]
    Keywords : IMT-Advanced; LTE; LTE-Advanced; OFDMA; SC-FDMA; Multi-hop transmission; PAPR.;

    Abstract : The User Equipments (UE) nowadays are able to provide various internet applications and services that raise the demand for high speed data transfer and Quality of Service (QoS). Accordingly, next generation mobile communication systems driven by these demands are expected to provide higher data rates and better link quality compared to the existing systems. READ MORE