Efficiency Improvement of WCDMA Base Station Transmitters using Class-F power amplifiers


Muthuswamy Venkataramani



(ABSTRACT)
Universal Mobile Telecommunications Systems (UMTS) is the preferred third generation (3G) communication standard for mobile communications and will provide worldwide coverage, a convenient software technology and very high data rate. The high data rate, especially, requires the use of bandwidth-efficient modulation schemes such as Quadrature Phase Shift Keying (QPSK). But ....etc

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report on thermal power plant ogl
dkls ldslf ldome llldns ldped gff ldmfr ld ldfcmeod cedcf 'lxcfcc ....etc

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THERMAL POWER STATION

The basic energy cycle involved in the plant is as follows :

Chemical Energy ---> Mechanical Energy ---> Electrical Energy

Turbine
Turbine converts the heat energy of the steam into mechanical energy.

The super heated steam works on the blades of the turbine and hence the blades starts rotating to produce the mechanical energy.
1) High pressure turbine.
2) Intermediate Pressure turbine.
3) Low pressure turbine.





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SUBMITTED BY:
SUBHASMITA DALABEHERA


Satellite Power Station and Microwave Power Transmission
Introduction
The demand for energy worldwide has increased by 40% in the last two decades.
The world’s main source of power is still generated by fossil fuels which is limited
(85% of the total power globally).
Harmful effects of hydrocarbon-based power sources to environment.
Requirement of clean energy sources.
Basic Concept
Solar Power Satellites providing a better way of ....etc

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INTRODUCTION


For the power generation with 2x110 MW and 3x210 MW of K.T.P.S. authorities are required to be operative to active full operation. The auxiliaries are basically operation either on L.T. System i.e. 415 V 3 ? power supply is made available to the system after providing the station transformer of 3x50 MVA capacity with voltage 220 KV/ 7.2/7.2 KV & different service transformers of capacity 1.0 MVA , 1.5 MVA , 2.0 MVA , which are located near the load centre as the transformer having the voltage of 6.6 KV /415 V. The 6.6 KV pow ....etc

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Automated security systems are a useful addition to today's home where safety is an important issue. Vision-based security systems have the advantage of being easy to set up, inexpensive and non-obtrusive. This paper proposes an integrated dual-level vision-based home security system, which consists of two subsystems - a face recognition module and a motion detection module. The primary face recognition module functions as a user authentication device. On an event of a failure in the primary system, the secondary motion detection module acts as ....etc

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Location & tributary information
Latitude 10deg18’45’ N Longitude 76deg38’10’’ E
Chalakudy has its origin in Annamlai region and is fed by four main tributaries sholayar,parambikulam,thekadi and karapara. Catchment area is 1390sqkm.Annual average rainfall is 3560 mm.It receives rainfall from southwest and northeast monsoon.
The power station is divided into two main regions, one consisting of four 8 MW generators, known as the Old Block and another consisting of a single 16 MW generator known as the Poringalkut ....etc

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