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Nowadays, automatic car is a very popular topic. The successive and safe steering of automatic car required high abilities in sensor system in order to detect emergencies immediately. However, it's impossible for one kind of radar filling up all the needs in different working environments. As a result, most of the automatic car companies decide to apply several types of radar sensor which can fit in all situations that contains strong light, noise, sudden movement and so on. The whole radar system mainly consists of laser radar, camera, ultrasonic radar and so on. This discussion will cover the laser radar, one of the most essential components in an autonomous vehicle. The paper will specifically focus on two primary principles used in laser radar for distance measurement: FMCW technology and TOF technology. And the advantages and disadvantages will be explained in more readable ways. Besides, an experiment of a well-designed TOF system will be introduced. [ABSTRACT FROM AUTHOR]

Synthetic aperture radar (SAR) is a powerful tool for remote sensing of the Earth's surface. The variety of practically important characteristics of a radar image quality and the radio observation conditions that determine them make it reasonable to introduce an unified indicator allowing at least a qualitative estimation of the influence of various factors on the potential radar observation efficiency, regardless of the signal processing method. As such an indicator, the amount of information contained in the reflected signal regarding the state of the observed object can be taken. Ratios are provided for decision-making on the efficiency of various approaches to the radio observation based on information-theoretic methods in terms of the indicators characterizing the amount of information received about the state of the observed object. The qualitative consideration carried out in this study ensures specifying the amount of information as a measure of the efficiency of radio observation during an aperture synthesis. [ABSTRACT FROM AUTHOR]

This paper proposes and implements a real-time word-level Arabic Sign Language (ARSL) recognition system. The work aims to facilitate the interaction between people with hearing loss and the general public. The system uses a frequency-modulated continuous wave (FM-CW) radar operating at 77 GHz millimeter frequency to transmit and capture signals from a person performing hand gestures in front of the radar. The signals are then used to train a convolutional neural network (CNN) to translate the gestures into words. The CNN is built using the Keras platform on Python and has ten layers, including two 2D convolutional layers. In the preliminary work, the system is designed to identify ten important common words. Preliminary results show that the system can classify gestures correctly in real time with 81% accuracy. [ABSTRACT FROM AUTHOR]

The best tool for acquiring information is research, this is one of the reasons why man is distinguished from other species on planet Earth. In man's desire to understand the nature that surrounds him, various obstacles appeared, one of which is being able to enter places that are difficult to physically access such as canyons or sea caves. It is for this reason that a means is developed by which three-dimensional modeling of the aquatic surface will be carried out based on the detection of obstacles and measurement of distance using ultrasound. This project presents the response to this problem through the use of ultrasound, which is responsible for sending and receiving sound waves for measuring distance on aquatic surfaces and the use of a radar that sends and receives electromagnetic waves with the objective to detect obstacles in the research route. The results of the development of this project are greater access to natural or superficial places with complicated characteristics for human entry, allowing the recognition of the interior of these ecosystems through modeling of the environment in which the environment is located. In short, the progress of this project will be of great contribution to different sectors such as research, construction, social, among others, whose procedure is the prior study of the environment for the development of the work. [ABSTRACT FROM AUTHOR]

Radio Detection and Ranging System (RADAR) is an acronym for Radio Detection and Ranging System. It's essentially an electromagnetic method for detecting the position and object distance from the RADAR's location. It operates by emitting energy into space and measuring the objects' echo or reflected signal. It works in the UHF and microwave frequencies. Radar works by sending electromagnetic radiation in the direction of objects and then observing the echoes and returns. Queuing theory is used to understand how radar works. This method depicts the radar transmission process in terms of Queuing parameters. This study uses the queuing idea to approach the aforementioned radar data communication process. The queuing mindset identifies communication flaws and allows the critical mind to be dispatched in order to reduce connection disruptions. Furthermore, this research employs the queuing idea to deal with delays and other issues that may arise during the process. Queues can aid in the discovery of inefficiencies in the system and the generation of solutions for reducing aid waste. For the chosen queue studies, all distinct overall performance metrics, as well as the queue length possibility producing function, are determined. A numerical and specified visual analysis depicts the theoretical examination of the queuing idea in Radar data communication. [ABSTRACT FROM AUTHOR]

A Novel indented 4-component MIMO (Multi-input-Multi Output)antenna with hole sleeves and H-opening is proposed and created for UWB(Ultra-Wide Band) applications. The proposed is Co-Planar waveguide receiving wire took care of and comprises of four symmetrical components with great disconnection. The dimensions of the proposed has low profileof 80×80×1.6mm3. The proposed MIMO receiving wire accomplished an impedance data transmission (S11<10dB) from 2.1GHz-20GHz with scores from 3.3GHz-4.1GHz and 8.2GHz-8.6GHzfrequencybands. These accomplished indents can channel the obstruction of Wi MAX(3.3GHz-3.7GHz), and military/radar applications band(8.2GHz-8.6GHz). Mutual coupling among the components is likewise underneath 25dB. The presentation boundary of proposed MIMO reception apparatus is moderately acceptable with extremely low ECC(Envelop Correlation Coefficient) which is under 0.02 excepted indents and DG (Diversity Gain) almost 10. Pinnacle addition of 5.8 dB is accomplished by the suggested receiving wire the radiation productivity is additionally above 80% aside from at scores. The PC produced and test results are in accord. So, the proposed four component MIMO receiving wire can be endorsed as an appropriate hopeful for UWB applications with stop groups for Wi-MAX and military/radar applications. [ABSTRACT FROM AUTHOR]

The best tool for acquiring information is research, this is one of the reasons why man is distinguished from other species on planet Earth. In man's desire to understand the nature that surrounds him, various obstacles appeared, one of which is being able to enter places that are difficult to physically access such as canyons or sea caves. It is for this reason that a means is developed by which three-dimensional modeling of the aquatic surface will be carried out based on the detection of obstacles and measurement of distance using ultrasound. This project presents the response to this problem through the use of ultrasound, which is responsible for sending and receiving sound waves for measuring distance on aquatic surfaces and the use of a radar that sends and receives electromagnetic waves with the objective to detect obstacles in the research route. The results of the development of this project are greater access to natural or superficial places with complicated characteristics for human entry, allowing the recognition of the interior of these ecosystems through modeling of the environment in which the environment is located. In short, the progress of this project will be of great contribution to different sectors such as research, construction, social, among others, whose procedure is the prior study of the environment for the development of the work. [ABSTRACT FROM AUTHOR]

The best tool for acquiring information is research, this is one of the reasons why man is distinguished from other species on planet Earth. In man's desire to understand the nature that surrounds him, various obstacles appeared, one of which is being able to enter places that are difficult to physically access such as canyons or sea caves. It is for this reason that a means is developed by which three-dimensional modeling of the aquatic surface will be carried out based on the detection of obstacles and measurement of distance using ultrasound. This project presents the response to this problem through the use of ultrasound, which is responsible for sending and receiving sound waves for measuring distance on aquatic surfaces and the use of a radar that sends and receives electromagnetic waves with the objective to detect obstacles in the research route. The results of the development of this project are greater access to natural or superficial places with complicated characteristics for human entry, allowing the recognition of the interior of these ecosystems through modeling of the environment in which the environment is located. In short, the progress of this project will be of great contribution to different sectors such as research, construction, social, among others, whose procedure is the prior study of the environment for the development of the work. [ABSTRACT FROM AUTHOR]