USN 06EC81

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networks.b. Describe the basic wireless MAN.c. Describe the differences between WLAN and WPAN.

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Eighth Semester B.E. Degree Examination, Dec.2013 lJan.20l4

g lt -- I \-\,E PART _ B !I4I CEHTRAL IcI4

Embedded System Design

' == 'f,m€i 3 hrs. Max. Marks:1.,.0,O,

""7d"."i;..,..- Note: Answer FIYEfull questions, selecting',"..,,',-,.' at leost TWO questionsfrom each part. i 1,,,,,:,t,

,i-l.g rr-', , ..*,t:".E ..=...:::.:r.,. PART - A€ I a. L[st a. pair of design metrics that may compete with one another, prodding an intuitiveE explbnbtion of the reason behind the competition. $u ir (06 Marks)

'f; b. W^hat it-""--rq#k"a window? Derive the percentage revenue loss .qrrilil"for any rise angle,o'E rather theiqi4ist for 45 degrees. ",,'; " (08 Marks)

E E c. For a particular product, you determine the NRE cost and unit',cobt to be the following forH= the three listed IQ technologies: '

t 5 FBGA: ($10.00G,$s0), ASrC: ($50.000, $10). {LSI: ($200,000, $5).i .' Determine precise volqgnes for which each technology yields the lowest totalcost. (06 Marks)oolt r -

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f; ; 2 a. List and define three main Or.jCF technologies:..H,ow are the benefits of using each of three

; : different design technologies trelpful to desigrqrs? (06 Marks)t()

; E b. What is single-purpose processor? What are the benefits of choosing a single-purposeq A processor over the general purpose proiessor? (04 Marks)

f € c. Design soda machine controller,. g{ven thqt soda coats 75 cents and your machine acceptsI 5 ouarters only. Draw the blackrhx'view, coryre with a state diagram and the state table,b u . :'.-:-; ! minimize the logic and then

ff46+4he final ciidffifl.= (10 Marks)

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: E 3 a. What is meant by pipelinihi? And why it is used in insiiuction execution? t06 Marks)

€ € b. Explain in detail the general software design tooh that are used by embedded system-+ i designers. -,ti (06 Marks)

E * c. Distlnguish in b€t,fueen timer and counter. '''r,i'"".,',, (04 Marks)

+ $ d. Explain in detail the operation and initialization sequence of LCD* (04 Marks)5rdav"l

9 E 4 a. Givq-11-''.5- iOO UHz crystal-controlled oscillator and a 32-bit and ml,rtnumber of 16-bitE E teffihl-count timers, design a real-time clock that output the date and time down to(c E -----e--

= # rnttrliseconds. You can ignore leap years. Draw a diagram and indicate termi4$rpount values

AF" " for alltimers. (06 Marks)

5 g b. How-to control the speed of DC motor by using PWM? loo naa'6

E H "..";' .. Given an analog input signal whose voltage ranges from -5 to 5V, and 8-bia.difritalq :, " encoding, calculate the correct encoding l.2Y and then trace the il]Egq.iye approxirfr#ion.

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; encoding, calculate the correct encoding l.2Y and thentrace the ilfgges{ye approxirfmtio*6 € approach to find the correct encoding.

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E 5 a. What is interrupt latency? Ard explain ttre fuctors affecting t,\l*\ LIBRARY j\; J;peMarks)E b. Explain briefly the operation of round-Robin with intemrptr. \\- .1i/ (06 Marks)

.T c. How to selecting an software architecture for your system affigffgld"o'#flacteristics ofvarious software architecture? *.s;z

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Describe the function of scheduler with suitable transition diagram. (06 Marks)Define semaphore and list oftried-and-ture ways to mess up with semaphores. (06 Marks)Explain the role timer function in RTOS. (08 Marks)

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06E,C834

Eighth Semester B.E. Degree Examination, Dec.20L3 lJan.2014

Biomedical Signal Processing-,...,.,a, Time: 3 hrs.

Note: Answer FIVEfull questions, selectingat least TWO questions from each part

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1 ;l-{try,ith the help of a block diagram, explain the objectives of biomedical signal"ful sis.i'a

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b. effihr ttre following biomedical signals. Draw the waveforms and giv€ the frequency

rangeGifu.,l€.,]rant to these signals: i) ECG, ii) EEG. o (08 Marks)

c. Explain ih1e-=difficulties encountered in biomedical signal analysie*+ill acquisition. (06 Marks)

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2 a. Starting frodmg$ equations of potential difference betweff*he limbs RA, LA and LL,derive the exprt:$$ns for ova, oVp and avr. Also reprgserit relationships between these

standard and augrrEqi*d.t ua vohages using vector diagud'm (08 Marks)

b. Draw a diagram to illffigle the electrode placemffi foi the frankVCG lead system. Also

write the resistor netwo&1fur combining the body'i"dlrface potentials to produce three time

varying scalar leads of the ft'd* yCC lead sys;t.ern (06 Marks)varying scalar leads of the fr'aft VCG lead sys;t.e4. (06 Marks)

c. Draw and explain ECG signal Char..$cteritt_U#.'- (06 Marks)lrr'n'rrji:'::: \.i

a. What is a digital filter? What dre, 'tiifferent elements of a digital filter? Mention

advantages of digital filters over andO$filters. (10 Marks)

b. If the output sequence of a digitaffiei is 1l?,3:2\ in response to a unit impulse, what is the

transfer function of this filter?fiaW the pol&.*fod zeros of this transfer function mentioning

a. What are the advanta@of an adaptive filter? treSlgn an adaptive filter using LMSalgorithm. (10 Marks)

b. Discuss briefly any"" l applications of adaptive filter. 4= (04 Marks)

c. Explain fro* qsjgE*ar" -od.t is used for OO Hz adaptive & ation. (06 Marks):!::: 1:""

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,l to ,roir. ratio by Jfu"tot of 16.(10 Marks)b. Me.nfu the characteristics of rroir. and signal in signal averaging tecffiues. Explain with

,Unik-Airgram tlpical signal averager. Draw the flow chart oi a ptograffforpveraging an

*.-;.'ECcsignal. ''-,rr.{10Marks)

O*1aJ Givenasequence of2Sdatapoints {1, 1, 1, 1, 1, 1, I,2,2,2,2,2,2,3,3,3,3,3;';4,"'4'r.4,4,jo"."'. 5,5,5,6,6,7|,illustrateHuffmancoding. (06IYIi 0",N

.l:## ' U. What is a data reduction algorithm? nxpUin lossy and lossless data compression. Chsiify.,

,t."{J the four data reduction algorithms into these categories. (06 Marks'),,r{1' .

c. With an example, illustrate and explain turning point algorith-. 4choosing the samples. K*g tt *r-'O (08 Marks)

7 a. Explain QRS detection algorithm. ll{ - - \?(10 Marks)

b. Write a note on different template matching techniques used in{p^€fGEElNygIS" l}j(fi0 Marts;

8 a. With a block diagram, explain the portable arrhythmia monitor.\I\ /;rli} Marks)

b. Describe the differences between a general purpose microprocess\foffipp$"S/(06 Marks)

c. Write a note on ST segment analysis. -\Sgl (06 Marks)

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USN 068C844

Max. Marks:100Note: Answer FIVE full questions, selecting

at least TWO questionsfrom each part.:]' .

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PART _ A

Eighth Semester B.E. Degree Examination, Dec.20L3 lJan.201.4GSM

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Calculqle the number of channels available in GSM 900 and GSM 1800:,r

Bring oUuthe tunctions of i) HLR; ii) VLR.Write a sffitnote on MS. ,,,,,,,,,ri'r,..,,

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Describe howpgrypr control is achieved in GSM. ,.,i1

Briefly explain fuffi;taAio fink measurements are made irf'SMExplain the uses of ildpp;ive antennas.

With the help of flow chartlrgyplain logical channels in GSM.Explain GSM frame structuies with a neat diagtqfn.

What are the management requirements for wireless networks? Briefly explain.With a neat figure, explain how TMN architecture is used in the GSM network.

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(08 Marks)(08 Marks)(04 Marks)

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Explain briefly the different attributes of spebch coder. (12 Marks)With a neat block diagram, explain time domain waveform coding. (08 Marks)

PART _ BExplain the process of call relpa 'initiated by ihe mobile using flow diagram. (10 Marks)List the bearer and teleservices related to the GSM PLMN. (10 Marks)

,,,-'rt " i,ll,:a. Briefly explain the 4uthentication requirements needed *to provide security in wireless

';, ;, (10 Marks)b. Using the call ffi;w, explain the token based challenge. t0 Marks)

,, ,. lrtx. ,,t:tlt" ..,a. Explain the ilArameters needed in selecting TDMA modulation siheme. (10 Marks)b. What i$directral efficiency of a wireless system? (02 Marks)c. Ca"

-fute the minimum signal power required for the acceptable quality o.firvoice at the BS

,'6edeiver of a GSM system? Assume receiver noise figure Nlto be5db, receiver temperature.,,{Bqual to 290"K and Boltzman's constant equal to 1.38 x 10-20 Joules/oK" [hat is the

1''-" maximum allowable path loss? The effective isotropic radiated power of"',thel MS islW (30 dbm), transmitter cable loss is 0 db, receiver cable loss amounts to 2.5db, and: transmitter and receiver antenna gain are 0 dbi and 12dbi respectively. Assume a fademargin of 10db and required Eb/I.{r of 13.5 db. (08 Marlrs)

(08 Marks)(06 Marks)(06 Marks)Explain the different interfaces of TMN.

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