Pulse-Time Modulation In pulse-modulated systems‚ as in an analog system‚ the intelligence may be impressed on the carrier by varying any of its characteristics. In the preceding paragraphs the method of modulating a pulse train by varying its amplitude was discussed. Time characteristics of pulses may also be modulated with intelligence information. Two time characteristics may be affected: (1) the time duration of the pulses‚ referred to as PULSE-DURATION MODULATION (pdm) or PULSE-WIDTH MODULATION
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information transfer. Answer * receiver * transmitter * repeater * amplifier 5 points Question 2 A half-duplex circuit carries information ______________ . Answer * both ways but only one way at a time * only one way * both ways simultaneously * none of the above 5 points Question 3 The _________ is a term for the device or unit that receives the information transfer. Answer * receiver * transmitter * repeater * amplifier 5 points
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RFID CORE TECHNOLOGY In the simplest terms‚ RFID is a technology that utilizes radio waves for communication between a transmitter and a receiver. In the case of RFID for business‚ the receiver is a reader/antenna and the transmitter is a tag. The tag is encoded with a unique identification number. This number is transmitted to the reader anytime the tag is queried. The unique ID number can then be referenced in a database for additional information regarding the tagged item. Any RFID system is
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A SEMINAR REPORT “TRANSRECEIVER WI-FI SYSTEM BASED ON IEEE 802.11B STANDARD” Submitted By 1. Aumkar A. Lele 2. Tejash Kasalkar 3. Amol B. Jadhav In partial fulfilment of the third year in computer engineering is approved. Guide: Examiner: ChitraWasnik 1.
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Advantages and Disadvantages of Internet Advantages Faster Communication The foremost target of Internet has always been speedy communication and it has excelled way beyond the expectations. Newer innovations are only going to make it faster and more reliable. Now‚ you can communicate in a fraction of second with a person who is sitting in the other part of the world. For more personal and interactive communication‚ you can avail the facilities of chat services‚ video conferencing and so on
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of Switched Beam and Adaptive Array Systems . . Smart Antenna Evolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 System Elements of a Smart Antenna 2.1 2.2 2.3 Smart Antenna Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Smart Antenna Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fundamentals of Antenna Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3.1 2.3.2 Theoretical model for an antenna
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eye-safe light beams from one "telescope" to another using low power infrared laser in the terahertz spectrum. The beams of light in Free Space Optics (FSO) systems are transmitted by laser light focused on highly sensitive photon detector receivers. These receivers are telescopic lenses able to collect the photon stream and transmit digital data containing a mix of Internet messages‚ video images‚ radio signals or computer files. Commercially available systems offer capacities in the range of 100 Mbps
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Smart homes A Smart Home is one that provides its home owners comfort‚ security‚ energy efficiency (low operating costs) and convenience at all times‚ regardless of whether anyone is home. Smart Home" is the term commonly used to define a residence that has appliances‚ lighting‚ heating‚ air conditioning‚ TVs‚ computers‚ entertainment audio & video systems‚ security‚ and camera systems that are capable of communicating with one another and can be controlled remotely by a time schedule‚ from any
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1886-1932) - Developed amplitude- modulated (AM) radio. 1906 – Performed the first broadcast of the human voice and music This is important because the signal was received by several different receivers‚ therefore it was truly a “broadcast‚” whereas pervious transmissions were sent to a single receiver. • LEE DE FOREST (AMERICAN – 1873-1961) - 1906 – Patented the Audion Tube. 1920-1930 – Developed a means to record sound onto film‚ making the first movies with synch sound. • DAVID SARNOFF (BELARUSIAN
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OPTICAL AMPLIFIERS IN OPTICAL COMMUNICATION SYSTEM Arminder kaur1‚ Upneet Kaur2‚ Gaurav soni3 1‚2M.Tech Scholar (ECE)‚ Amritsar College of Engg. &Technology‚ Amritsar‚ Punjab‚ India. 3Associate Professor‚ Deptt. of ECE‚ Amritsar College of Engg. & Technology‚ Amritsar‚ Punjab‚ India. ABSTRACT: This paper reviews several technologies of optical amplifiers with their applications and we focus on the recent progress in some important aspects of several optical fiber amplifier technology
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