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Principles Of Radar And Sonar Signal Processing Pdf

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Principles of Sonar Performance Modelling pp Cite as. Once a pressure disturbance has been converted to an electric current, it can be processed in various ways to enhance the signal-to-noise ratio before being presented to an operator for interpretation. In a modern sonar system, the processing is mostly carried out by a digital computer, which means that one of the first steps must be a conversion from an analogue signal to a digital one.

Principles of Radar and Sonar Signal Processing

Sonar so und na vigation and r anging is a technique that uses sound propagation usually underwater, as in submarine navigation to navigate , communicate with or detect objects on or under the surface of the water, such as other vessels. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, [3] and SODAR an upward-looking in-air sonar is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low infrasonic to extremely high ultrasonic. The study of underwater sound is known as underwater acoustics or hydroacoustics.

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The design of digital sonar is related to a wide knowledge of many subjects in science and technology. Therefore the sonar designer has to be familiar with these subjects and use them as pre-requisites in the design of good digital sonar [1]—[12]. Unable to display preview. Download preview PDF. Skip to main content. This service is more advanced with JavaScript available.

Sonar signal processing

Radar is a detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft , ships , spacecraft , guided missiles , motor vehicles , weather formations , and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna , a receiving antenna often the same antenna is used for transmitting and receiving and a receiver and processor to determine properties of the object s. Radio waves pulsed or continuous from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed. Radar was developed secretly for military use by several nations in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom , which allowed the creation of relatively small systems with sub-meter resolution. High tech radar systems are associated with digital signal processing , machine learning and are capable of extracting useful information from very high noise levels.

Radar and sonar optimum reception in white noise application to radar optimum reception in coloured noise adaptive processing target and background.

Principles of Radar and Sonar Signal Processing

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Sonar signal processing

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