packeting the frame queue to a definable window size which is provided to sender and receiver. Sliding window protocol defines maximum transmitter window size‚ Ws which is always one less than the sequence number. How transmitter window is defined: It is contains the data that are ready to be send. The lower limit in transmitter window which is waiting for acknowledgement is Slast .The upper limit frame in transmitter window is Slast + ws -1.Also each transmitted frame is allocated by a timer that
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communication performance. This paper presents a Multipath Fading Mitigation Technique that reduces the negative impact of the fading process. In our Paper‚ Multiple-Input Multiple-Output (MIMO) technology:a Wireless Technology uses Two Transmitters and Receivers each to transmit the multiple signals (one for each antenna) at the source and the destination. It promises to deliver the best solution to eliminate the trouble caused by multipath wave propagation. The outcome has better quality (lower
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NANYANG TECHNOLOGICAL UNIVERSITY School of Electrical and Electronic Engineering Laboratory Experiment ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- Laboratory Report ------------------------------------------------- ------------------------------------------------- For ------------------------------------------------- -------------------------------------------------
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to connect cashier system 3. Stopped being made in 2004 B. Did not work in its beginning II. How wifi works A. Transmitter-creates radio waves B. Receiver 1. Detects radio waves in the air 2. Converts radio waves into energy C. Different frequencies (channels) depend on radiation from transmitter and sensitivity on receiver III. Uses A. Wireless internet connection 1. Can enable internet connection on wireless devices 2. Has set
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DOPPLER SHIFT Doppler is the apparent change in wavelength (or frequency) of an electromagnetic or acoustic wave when there is relative movement between the transmitter (or frequency source) and the receiver. Summary RF Equation for the Two-Way (radar) case 2(VXmtr % VTgt) fXmt f Rec ’ fXmt % fD ’ fXmt % c Summary RF Equation for the One-Way (ESM) case V f f Rec ’ fXmt % fD ’ fXmt % Xmtr or Rec Xmt c Rules of Thumb for two-way signal travel (divide in half for one-way ESM signal
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fields for spying purpose. BLOCK DIAGRAM: Transmitter: Receiver: HARDWARE IMPLEMENTATION: All we need to have is the following components to design war field spying robot apart from a base with wheels and motors are Sensor unit- a wireless night vision camera: apart from what the basic camera consists of a transmitter unit. It captures images and transmits these images through the transmitter in the form of digital signals‚ which are received by the receiver unit connected to TV or computer. The
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4 Introduction: Introduction Ultrasonic RADAR is basically one of the applications of the RADAR system. It consists of a set of ultrasonic transmitter and receiver‚ both of which operate at the same frequency. When something moves in the area covered by the system‚ the fine balance of the circuit is disturbed and the alarm system connected at the receiver side is triggered. The circuit is sensitive and can be adjusted to reset itself automatically or to stay triggered until it is manually reset
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Arduino present on the transmitter side. After processing the command‚ a code is sent wirelessly to the receiver. The receiver side decodes the code and makes the robot move accordingly. The MATLAB based GUI for wireless control of the robot is shown in Fig. 1. The prototypes for the transmitter and the robotic car (present on the receiver side) are shown in Figs. 2 and 3 respectively. Fig. 1. MATLAB GUI for controlling the wireless robot Fig. 2. Authors’ prototype of the transmitter side Fig. 3. Authors’
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can travel even when there is an obstruction between transmitter & receiver. Next‚ RF transmission is more strong and reliable than IR transmission. RF communication uses a specific frequency unlike IR signals which are affected by other IR emitting sources. This RF module comprises of an RF Transmitter and an RF Receiver. The transmitter/receiver (Tx/Rx) pair operates at a frequency of 434 MHz. An RF transmitter receives serial data and transmits it wirelessly through
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chips have been used to maintain a wireless link between the two computers. The PC on the transmitter side first transmits the data serially to the microcontroller with the help of voltage converter (MAX232) at an adjusted baud rate. This data is then transmitted to the microcontroller on the receiver side with the help of the wireless link maintained by the RF module. This received data is then sent to the receiver PC serially. The RS-232 cable (DB-9 connector in this case) is used to coordinate the
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