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Polyphase modulation generator for radar signal

By Jiří Hás

Abstract

The goal of the theses is to propose an idea for a generator of a radar polyphase modulated signal, that will operate at a frequency of 30 MHz. At the beginning of this project, an outline of the basic structure of the generator is proposed and a function of a programable logical perimeter is analyzed. This perimeter, together with an oscillator, generate two mutually phase-shifted rectangular pulses in its outputs. The shift phase of these two pulses is set by a program, and operated by single-chip processor. Those pulses are consequently converted to sinusoidal wave with the help of filters, and the required phase is chosen by the multiplexer, which is also operated by the processor. The phase modulation is realized this way. The output signal of the generator is radiopulse, which subpulses are phase modulated by the described method. Individual parts are solved analogously in this Theses

Topics: Fázová modulace Modulátor Programovatelný logický obvod Elektrický filtr; Phase modulation Modulator Complex Programmable Device Electric filter
Publisher: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Year: 2009
OAI identifier: oai:invenio.nusl.cz:217798
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