Dynamic Spectrum Access Simulation

5571 WordsSep 1, 201223 Pages
SOFTWARE DEFINED COGNITIVE RADIO USING MATLAB SOFTWARE DEFINED COGNITIVE RADIO USING MATLAB INDEX ABSTRACT…….………………………………………………………………....................................5 Chapter 1 -SOFTWARE-DEFINED RADIO 1.1 Introduction to Software-Defined Radio………………………………………………6 1.2 A brief history of SDR ………………………………………………………………………….7 1.3 Role of SDR ………………………..……………………………………………………………….7 1.4.1 Problems faced by Wireless Communication Industry 1.4.2 How SDR solves the problems 1.4 Features of SDR……………………………………………………...............................9 Chapter 2 –COGNITIVE RADIO TECHNOLOGY 1 2 3.1 A vision of Cognitive Radio…………………………………………………………..……10…show more content…
By contrast, software defined radio technology provides an efficient and comparatively inexpensive solution to this problem, using software upgrades. SDR defines a collection of hardware and software technologies where some or all of the radio’s operating functions are implemented through modifiable software or firmware operating on programmable processing technologies. 1.2 A Brief History of SDR An SDR is a radio in which the properties of carrier frequency, signal bandwidth, modulation, and network access are defined by software. Today’s modern SDR also implements any necessary cryptography; forward error correction (FEC) coding; and source coding of voice, video, or data in software as well. The roots of SDR design go back to 1987, when Air Force Rome Labs (AFRL) funded the development of a programmable modem as an evolutionary step beyond the architecture of the integrated communications, navigation, and identification architecture (ICNIA). Today’s SDR, in contrast, is a general-purpose device in which the same radio tuner and processors are used to implement many waveforms at many frequencies. The advantage of this approach is that the equipment is more versatile and cost effective. 1.3 Role of SDR 1.4.1 Problems faced by Wireless Communication Industry * Commercial Wireless network standards are continuously evolving from 2G to 2.5G/3G and then to 4G. The difference in
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