7/26/2019 Sat Comm Questions

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PART A ( Answer all the Questions) 20*2 = 40

1. Distinguish between pre-assigned and demand-assigned TDMA satellite access.

2. Define SDMA.3. What is meant by transpnder capacity!

". #i$e the types f satellite ser$ices

%. What is meant by prcessing gain & bursting cdes!'. What are the types f digital speech interplatin!

(. A satellite dwnlin) at 12 #*+ perates with a transmit pwer f 'W and an antenna

gain f ",.2 d. alculate the /0 in dW.,. Mentin the merits and demerits f TDMA $er DMA.

4. What is preamble!

15. Define guard time.

11. What is DS0!12. Write abut pre-assigned TDMA satellite access

13. Define Saturatin flu6 density

1". What is mean by 7D8 and 0D8.

1%. What is an /0!1'. Why are TWT9s emplyed in earth statin!

1(. What is a SAD/ system!1,. Mentin ne serius limitatin assciated with DMA.

14. What is meant by input bac) ff a transpnder!

25. What is intermdulatin nise!

WWW.:0D;AT*0ii? /6plain satellite switched TDMA. >'='?

22.>i? /6plain the TDMA burst and frame structure f satellite system. Draw thenecessary diagrams.

>ii? Describe the TDMA system. >'='?

23.>i? Discuss in detail abut direct se@uence spread spectrum and mentin itsad$antages.

>ii? Distinguish between preassigned DMA and demand assigned DMA in relatin

t a satellite cmmunicatin netwr). >'='?

2". With neat diagram e6plain the functining f SAD/ system >12?2%. >i? With a blc) diagram e6plain hme recei$er indr unit.

>ii? Write abut /0 and carrier t nise rati f recei$er satellite. >'='?

2'. /6plain in detail transmit recei$e earth statins >r? /6plain in detail /arth statins

>12?2(. /6plain in detail abut T:7. >12?

2,. Write shrt ntes n MAT: and AT:. >12?