by Communication over a satellite link feg, TV broadcasting) 5 a. It has a large
ID: 2293818 • Letter: B
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by Communication over a satellite link feg, TV broadcasting) 5 a. It has a large number of paths in the channel profle b. It has a small number of paths in the channel proffile. C. It shows large delay. d. it shows small delay. e. Both a. and c. are correct f. Both a. and d. are correct 8 Both b. and c. are correct h. Both b. and d. are correct i. None of the above is correct. A communication system running in the band 900MHz-910MHz with an average channel bo3.5+3 The transmit power is equal to 0.1W and the noise variance is normalized to 1. The communication protocal is bad obtaining one erroneous bit each 10 transmitted. BPSK modulation is used Answer the following two questions: 25. The throughput (useful data rate) value ibs a. 13.92Mbps b. 12.53Mbps ?. 41.08Mbps d. 4.108Mbps e. 36.97Mbps f. All of the above is correct. &. None of the above is correct. 26. An engineer proposed to change the modulation to QPSK in order to increase the throughput value. Which one is correct from the following a. Excellent proposal:his proposal will increase the throughput and will not affect amything else. Excellent proposal: his proposal vill decrease the transmitted power and wilnot affet anything else. Deficient proposal: his proposal will increase the erroneous reception. Deficient proposal: his proposal will increase the path loss. b. c. d. e. All the options are equal. None of the above is correct. f.Explanation / Answer
1 . Communications satellites usually have one of three primary types of orbit, while other orbital classifications are used to further specify orbital details.
a) Geostationary satellites have a geostationary orbit (GEO), which is 36,000 kilometres (22,000 mi) from Earth’s surface.
b) Medium Earth orbit (MEO) satellites are closer to Earth. Orbital altitudes range from 2,000 to 36,000 kilometres (1,200 to 22,400 mi) above Earth.
c) The region below medium orbits is referred to as low Earth orbit (LEO), and is about 160 to 2,000 kilometres (99 to 1,243 mi) above Earth.
2) In television, broadcast delay is an intentional delay when broadcasting live material. Such a delay may be short (often seven seconds) to prevent mistakes or unacceptable content from being broadcast.
Longer delays lasting several hours can also be introduced so that the material is aired at a later scheduled time
3) A short delay is often used to prevent profanity, bloopers, nudity, or other undesirable material from making it to air, including more problems such as technical malfunctions .
4 ) In this instance, it is often referred to as a 'seven-second delay' or 'profanity delay'. Longer delays, however, can also be introduced, often to allow a show to air at the same time for the local market as is sometimes done with nationally broadcast programs in countries with multiple time zones. Considered as time shifting, this is often achieved through a 'tape delay', using a video tape recorder, modern digital video recorders or other similar technology.
25) ans) a communication system running in the band 900Mhz to 910Mhz in an average channel......
the communication protocal is bad obtaining errorneous bit each 10 transmitting them....
then it bpsk modulation uses its the throughput value is 14mbps answer may be 13.92mbps
26) in order to increase in qpsk modulation throughput value in enginner proposes
it proposes the excellent proposal in both are not effective any thing else both increse the throughput or decrese the transmitted power
in deficient proposals both are increses to erroraneous reception, and pathloss. may be all are the options are equal
or
a and b otions are true
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