BROADBAND ACCESS USING WIRELESS OVER MULTIMODE FIBRE SYSTEMS


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Generation of linearized optical single sideband signal for broadband radio over fiber systems
Radio over fiber (RoF) technique shows advantages in- cluding low loss, high bandwidth, and immunity against gelectromagnetic interference. In most RoF systems, in- put radio frequency (RF) signals are carried on optical carriers via intensity modulation (IM) and recovered after transmission using direct detection (DD) by photodetec- tors (PDs). Generally, LiNbO3 Mach-Zehnder modula- tors (MZMs) are utilized for IM/DD links. However, harmo ....etc

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Abstract
In the astronomy world, there is a need for high-performance radio telescopes operating at low frequencies. Such a telescope can be realized by a large network of small dipole antennas spread over an area of about 360 square kilometers. This antenna configuration requires a multi-terabit optical network to transport and collect the massive amounts of data picked-up from the sk ....etc

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1.1 Wireless Communication Systems
Wireless communication has experienced tremendous growth in the last decade. In
1991 less than 1% of the world’s population had access to a mobile phone. By the
end of 2001, an estimated one in every six people had a mobile phone . During the
same period the number of countries worldwide having a mobile network increased
from just three to over 90%. In fact the number of mobile subscribers overtook the
number of fixed-line subscribers in 2002, as shown in Figure 1.1. It is predicted that
th ....etc

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Wireless communication has experienced tremendous growth in the last decade. High data rate wireless communication is becoming increasingly important to mobile users in corporate and public networks in the indoor environment. Although voice and low data rate services were the first applications of cellular networks, the focus in recent years has shifted to very high-bandwidth delivery, which is a key driver for system and network design. While wireless local area (WLAN) access is important for data applications, mobile users still expect reliab ....etc

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ABSTRACT In the astronomy world, there is a need for high-performance radio telescopes operating at low frequencies. Such a telescope can be realized by a large network of small dipole antennas spread over an area of about 360 square kilometers. This antenna configuration requires a multi-terabit optical network to transport and collect the massive amounts of data picked-up from the sky. Within the Retina project, we have developed an architecture for such a multi-terabit optical network. In addition, new 160 Gbit/s line rate technology has be ....etc

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Abstract:

In this project we show how we control multiple systems using one wire system. To control with one wire system is a smart control system. There is only one wire between transmitter and receiver circuit. It is possible to control the electrical appliances with the help of mobile control also. In this we use one DTMF generator circuit and one receiver circuit. DTMF generator circuit transmits the signal to the receiver circuit. Receiver circuit receives this signal and then controls the electrical appliances circuit with ....etc

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