Implementation of Next generation DVB-T based OFDM in Modern Wireless Technology PDFRohit Kumar (M.Tech. Student), Asst. Professor Arvinder Pal Singh KalsiNow-a-days, life in the 24*365, in communication arenas video broadcasting is acting a key role. However, it is analyzed in terms of various wireless communication channels. Thus there is a need for development of next generation DVB-T. In OFDM the data is transmitted into parallel fashion by dividing high rate serial data into low rate sub-streams. By dividing the data into parallel streams the data rate is reduces, which results the increase of the length of symbol duration. The robustness of the channel and high data rates make OFDM as an efficient scheme for all the DVB-T applications and others applications too. So, we use one of the proposed OFDM signals of the Digital Video Broadcasting (DVB) standard which is now used for the European terrestrial digital television (DTV) service. In this paper, the advanced and proposed module of DVB-T system model is mentioned, based on the analysis of some parameters, which will discuss later in this paper, on the basis of FFT via different channels, time and frequency synchronization.
Wireless Communication Book By Sanjay Sharma Pdf Freel
Enhancement of Traffic Capacity at High Data using MIMO Technology PDFSwati Kumari, Dr. Rabindranath BeraMIMO technology plays a vital role in wireless communication which uses multiple antennas at both transmitter and receiver side. As the demand of data rate is increasing day by day, there is a need of high throughput, wide coverage, capacity and improved reliability. Integration of OFDM with MIMO holds the potential to drastically increase the data rate in future wireless communication system without increasing the transmit power and bandwidth. In this paper we mainly focus on the advantage of using MIMO-OFDM system and the drawback of using SISO, SIMO, MISO systems which have been verified using simulation. Performance of the systems is measured with respect to BER, capacity and finally the data rate is determined. The simulation results are obtained using MATLAB/SIMULINK software.
Real Time Multiple Cross Platform Communication through Bluetooth PDFMs Prerna Hingle, Ms Shubhangi GiripunjeBluetooth provides low power and low cost connections between two Bluetooth devices. Bluetooth has high level of compatibility because of the standardized Bluetooth protocol stack that is available. To establish a wireless connection between two or more devices, the platform on which the application is working opens a socket. This paper introduces a concept to establish multiple connections for real time communications through Bluetooth, independent of the platform.
Detection of Sybil Attacks in Vehicular Ad hoc Networks Based on Road Side Unit Support PDFMuhammad Saad Naveed, Dr. M Hasan IslamUntil recently vehicles and transportation systems were considered as the realm of mechanical engineers, but the need for the road safety and desire to be connected to the world, has broaden the industry scope. In order to do so Intelligent Transport System has been introduced and for few years, Vehicular Ad hoc Networks are getting much attention. The advance developments, wireless communication and life safety point towards to take into consideration the need of security in VANETs. In VANET, many attacks are possible and can cause serious damages to life. One such attack is Sybil attack. Sybil attacks have been regarded as a serious security threat to Ad hoc Networks and Sensor Networks. They may also damage the potential applications of Vehicular Ad hoc Networks (VANETs) by creating a deception of traffic congestion. Here we look on how the Sybil attack works and possible ways that an attacker can cause harm by launching these types of attacks in VANETS, along with the detection schemes that can be used to identify Sybil nodes and prevent the network from various hurtful effects. Later we propose improvements in RSU supported certificate based detection mechanism which may be helpful in solving problems with the current model.
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