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Problem :
(a) State and describe the transmission ranges associated with wireless transmission. Illustrate your answer with a diagram.
(b) Sketch a graph representing how a wireless signal attenuates with distance travelled.
(c) What is multiplexing? Briefly describe the different ways in which a medium can be multiplexed.
(d) Spreading the spectrum for signal transmission helps alleviate the narrow band interference problem. What is narrow band interference? State and describe different techniques that can be used to spread the spectrum.
(e) How would you modify the binary phase shift keying modulation technique to improve efficiency?
(f) Explain techniques used in cellular systems to improve the reuse of frequency channels. Illustrate your answer.
(g) Explain the effect known as cell breathing.
Determine the synchronization of bits The synchronization provided by use of start and stop bits, an extra bit known as a parity bit may optionally be transmitted along with th
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Number systems Consider a decimal number: 7654.32 Short hand for: 7 * 103 + 6*102 + 5* 101 + 4*100 + 3*10 -1 + 2*10 -2 Likewise
i wants to know the methods and process of substitution and transposition cipher with examples.
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1. (a) Given a baseband bus with station 1 located at 10m, station 2 located at 1000m, and station 3 located at 1010 meters (see diagram above). If the data rate of the bus is 10 M
An important terminal that is required between DTE and PSTN is (A) Server (B) MODEM (C) Relay
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