Spread spectrum (SS) technology is a data transfer technique designed to overcome the interference problems associated with narrow-band very high frequency and ultra high frequency Data transfer systems. Spread spectrum communication is used to reduce jamming of communication signal and provides a highly secure communication. In this paper we specifies the Field Programmable Gate Array (FPGA) i...

Current digital voice communication systems allow only modest levels of protection of the coded speech and often do not follow the dynamic changes that occur in the transmission channel. We present a method that provides optimal voice quality and intelligibility for any given transmission channel condition. The approach is performed via adaptive-rate voice (ARV) coding using an adaptive-rate mo...

As broadband networks become more common, using high quality video streams such as DV (Digital Video) or HDV (High-Definition Video) has become increasingly popular in multipoint communications. Today's video communication systems which support high quality digital video formats on broadband networks are used for a variety of purposes (Bak, 2006; Gharai, 2006; Bodecek & Novotny, 2007). Although...

This thesis focuses on the study, implementation and improvement of a digital controller for a power factor correction (PFC) converter. The development of the telecommunications industry and the Internet demands reliable, cost-effective and intelligent power. Nowadays, the telecommunication power systems have output current of up to several kiloamperes, consisting of tens of modules. The high-e...

Usage of the benefits of electrical communication has become an inseparable part of our lives now. Through this paper, I have tried to summarize various technologies that are important in the field of digital communication and have also included the recent advancements in the same field. The paper starts with the basic idea about the communication system followed by basic modulation techniques ...

Introduction: Median Nerve (MN) originated from medial and lateral cords of Brachial Plexus can be affected by anatomical variations which may lead to several diagnostic and therapeutic mistakes. This paper aim is to study about MN variations investigated by cadaveric studies. Materials and Methods: This study is based on research in electronic databases. Full text of all relevant papers has b...

In this thesis, we consider the interference cancellation problem for the broadband digital aeronautical communication system. We investigate the L-band digital aeronautical communication system (L-DACS) in the presence of distance measuring equipment (DME) interference. First, we describe the OFDM receiver of the LDACS1. In addition, we discuss the impacts of the DME spectrum on the subcarrier...

Every year the number of IoT devices is growing, which gives a boost to development such technology as Power Line Communication (PLC). The term PLC refers use power supply circuit transmit data. Full-duplex can be applied increase data transfer rate in PLC. difficulty using full duplex need suppress transmitter’s own signal (interference signal). Analog cancellation and digital are used for thi...