Thermal noise cannot avoid from any communication system. Using Bluetooth technology mobile phones, Portable Computers and Personal Digital Assistant PDA can communicate each other without cables and Bluetooth is a perfect and idle solution for short range cable infrastructure.
Then next step is modulated narrowband signal mixed with carrier frequency and generated the new spread spectrum signal. Direct Sequence Spread Spectrum. Frequency Hopping Spread Spectrum Instead of spreading the signal over a wide band of frequency, Frequency Hopping Spread Spectrum transmits for a short burst of data on one frequency hops to another new frequency.
Generally FHSS systems, the receiver has a ability to synchronize with the transmitted signal within a small time. Scattering occurred from rough surfaces such ground. This arises due to external electromagnetic disturbances and errors in the communication systems.
Therefore spread spectrum is a technique that increases signal bandwidth beyond the minimum necessary for data communication . In this project mainly focused on Frequency Hopping Spread Spectrum.
Introduction Wireless communication is a one of the fastest growing sectors in modern communication arena.
In the receiver part of the system demodulated the spread spectrum signal. After this process the resultant signal is narrowband signal. High SecuritySpread Spectrum Systems are very secure, because with help of pseudo-codes are spread spectrum signals can be produced.
This chapter provides a detail description about spread spectrum starting from the basic concepts and provides clear idea about the subject. The advantage of the spread spectrum system is that, while the probing of the signal may be wideband, it is possible to detect the transmitted signal using narrowband receiver preceded by a wideband mixer, thus improving the dynamic range of the system as a compared to the direct RF pulse system.
Afterwards describes the how frequency hopping spread spectrum technique applied to Bluetooth wireless communication. Structure of the Report This report is organized into five chapters.
Then Bluetooth supports both point to point and point to multipoint connections to enable ad hoc networking. Another benefit of the frequency hopping spread spectrum is jamming resistance.
The development of the Bluetooth industry standard started in the when EricssionIBMIntelNokia and Toshiba formed the Bluetooth Special Industry SIG to develop and promote a global solution for short range wireless communication operating in the unlicensed 2.
This fading is the frequency dependent and fading also changes if the transmitter or receiver is moved. In modern communication and Business industry the "Bluetooth Technology" is a hottest topic, because it has low power, very cost effective and simple system.
Bluetooth operate in globally available 2.
In the later part of industry was investigated the commercial applications of spread spectrum technology and today spread spectrum technique used for variety of wireless communication applications.
The Spread Spectrum Techniques Essay add: The following illustrates the major properties of the Spread Spectrum Techniques. In frequency hopping spread spectrum possible to have a number of communication taking place at the same time across the same frequency band.
Advantages of Frequency Hopping Spread Spectrum Frequency hopping spread spectrum has a greater advantage of frequency diversity. The example for additive noise effects is thermal noise which generated from active and passive elements in the communication system.
Intermodulation NoiseIntermodulation noise arises signals that having different frequencies share the same transmission medium. Frequency Hopping Spread Spectrum is a simple system.
Today, "Bluetooth "is the one of the recent development of the wireless communication world. These effects explained in the later on this chapter.
The following chapter provides a clear understanding about the spread spectrum and their properties and how spread spectrum involved to Bluetooth communication.Theory of Spread-Spectrum Communications-A Tutorial RAYMOND L.
PICKHOLTZ, FELLOW, I ~EE, DONALD L.
SCHILLING, reduction capability inherent in the use of spread-spectrum techniques, so that a considerable number of users might It is the aim of this tutorial paper to answer some of these questions succinctly, and in the process, offer.
Contemporary Spread Spectrum Techniques: A Comparative Study 76 Fig UFHSS: The sender A and each receiver B i choose the channels on which they send and listen randomly from the set C of available frequency channels respectively.
CHAPTER 1 INTRODUCTION: The idea of this project is to study different techniques of spread spectrum. These techniques include the two processes of direct-sequence spread spectrum and frequency hopping spread spectrum. Explore publications, projects, and techniques in Spread Spectrum Techniques, and find questions and answers from Spread Spectrum Techniques experts.
Spread Spectrum Research Papers. Spectrum – IEEE Xplore Over the last five years, the work in the field still has been primarily. rector of Avionics Research. Spread Spectrum Techniques and their Applications to Wireless Spread Spectrum (SS). Download Premium Research Papers Full text search our database oftitles for Spread-Spectrum Techniques to find related research papers.
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