operating at 433MHz. Our aim is to maximize the gain of the antenna and achieve impedance matching between load impedance and transmission line’s impedance. Among a wide range of different antennas‚ our group decide to build up a Yagi Uda antenna to fulfill this assignment for two main reasons. Firstly‚ the gain that Yagi Uda antenna provides is very high. Hence for transmission‚ Yagi Uda antenna makes sure all the transmitted wave to be directed to required area and for reception‚ it can receive maximum
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of digital transmission? The advantage of digital transmission over analog transmission is noise immunity. Digital pulses are less susceptible than analog signals to variations caused by noise. Digital signals are better suited to processing and multiplexing than analog signals. Digital transmission systems are more noise resistant than the analog transmission systems. Digital systems are better suited to evaluate error performance. 2.What are the disadvantages of digital transmission? The transmission
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Computer Networks NETWORKING CONCEPTS Network A network is basically an interconnection of various points to make a connected system e.g Road‚ Telephone‚ Social Data Network A computer network therefore refers to an interconnection of computers and other peripherals by use of a communication link Peer to Peer Networks In a peer-to-peer network‚ all computers are considered equal; they all have the same abilities to use the resources available on the network. Peer-to-peer networks are designed
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CHAPTER 12 ROUTING IN SWITCHED NETWORKS A NSWERS TO Q UESTIONS 12.1 The average load expected over the course of the busiest hour of use during the course of a day. 12.2 The tradeoff is between efficiency and resilience. 12.3 A static routing strategy does not adapt to changing conditions on the network but uses a fixed strategy developed ahead of time. With alternate routing‚ there are a number of alternate routes between source and destination and a dynamic choice of routes is
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channel‚ decode-and-forward‚ keyhole effects‚ moment generating function‚ orthogonal space-time block codes‚ symbol error rate. I. I NTRODUCTION It has been known that use of multiple antennas at transmitter and receiver increases speed of data transmission between communication terminals. However‚ MIMO channel capacity is degraded by correlation and keyhole effects. Because of the keyhole effect [1]‚ [2]‚ the rank of MIMO channel matrix is reduced to one‚ even in the absence of antenna correlation
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protocol for obtaining the physical address of a node when the IP address is known is called _______. C) ARP A signal can lose energy due to the resistance of the medium. This is called _______. D) attenuation _______ can cause errors during data transmission. A) White noise B) Impulse noise C) Echo Which of the following best describes a single-bit error? B) A single bit is inverted per data unit. If the ASCII character G is sent and the character D is received‚ what type of error is
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the frequency of the signal‚ the shorter the wavelength. vp Is the phase velocity f is the frequency vp Is the phase velocity f is the frequency λ=vpf Figure 1.1 What is a wave guide? Figure 1.2 A waveguide is a special form of transmission line consisting of a rectangular (figure 1.2) or cylindrical metal tube or pipe‚ through which electromagnetic waves are propagated in microwave and RF communications. It is commonly used in microwave communications‚ broadcasting‚ and radar installations
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yayavaram@yahoo.com EMBEDDED SYSTEMS UNITS IV & V Interfacing methods The interfacing of an I/O device to an embedded system is always an important task. Generally interfacing means ‚ both the physical connections of the hardware devices and the software routines that effect the data transfer .Due to incompatibility in speeds of the microcontroller and I/O devices ‚there is always a problem in data transfer between two devices .This leads to a concept
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each having either manual or automatic transmission and either 2 or 4 doors. The following table shows the classification of 950 cars model. Model 2-door 4-door Automatic 135 351 Manual 251 213 If a car is picked at random from the fleet‚ calculate the probability that it is: (i) automatic‚ (2 marks) (ii) automatic or 2-door‚ (2 marks) (iii) manual and 4-door‚ (2 marks) (iv) 2-door given that it is manual transmission. (2 marks) 4. Consider a random
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* Set of techniques that allows the simultaneous transmission of multiple signals across a single link * allows several transmission sources to share a larger transmission capacity Link = physical path Channel = portion of a link that carries a transmission between a given pairs of lines 2 CATEGORY OF MULTIPLEXING WDM FDM TDM ADSL Frequency Division Multiplexing * FDM – numerous signals are combined for transmission on a single communications line or channel. Each
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