YANGAN TECHNOLOGICAL UNIVERSITY
DEPARTMENT OF ELECTRONIC ENGINEERING AND
INFORMATION TECHNOLOGY
SAMPLE QUESTIONS AND SOLUTIONS
( EcE 4012 ) POWER ELECTRONICS [ EC &MC ]
Page 1
( EcE 4012 ) POWER ELECTRONICS [ EC &MC ]
I. CH ( 6 ) Inverters, Dual Converters, Choppers, and Cycloconverters
( 1 ) With the aid of a circuit diagram and wave forms, describe the working
principle of The three-phase line-communicated full- controlled inverter or Sixpulse Converter.[pg 100~101]
( 2 ) Explain with the help of a circuit diagram the working principle of the current
source inverter. [pg 111~112]
( 3 ) Explain with the help of a circuit diagram the working principle of the Threephase forced-communicated bridge inverters. [pg 113 ,114 ~115]
( 4 ) Draw the circuit diagram and explain about the single phase Dual converter.
[pg 123~124]
( 5 ) Draw the circuit diagram of a Three phase dual converter , circulating current
type Dual Converter ( Mid-point Configuration ). [pg 124~125]
( 6 ) Describe with the help of a circuit diagram the working principle of the
circulation current type dual converter ( Dual- bridge configuration ). [pg 127]
( 7 ) Describe with the help of a circuit diagram the working principle of the
circulation current free type or non-circulating type dual converter.[pg 128]
( 8 ) Explain the circuit operation of voltage step-up chopper by using the circuit
diagram and waveform. [pg 138~139]
( 9 )Explain the circuit operation of voltage step-down chopper by using the circuit
diagram and waveform. [pg 136~137]
( 10 ) Describe with the help of a circuit diagram and the operation of a Jones
chopper. Discuss its advantages and disadvantages. [pg 139 ,140 ,141 ~ 142 ]
( 11 ) Explain the circuit operation of AC chopper by using the circuit diagram and
output voltage waveform. [pg 144~145]
( 12 ) Explain with the help of a circuit diagram, the operation of a single-phase/
single-phase cycloconverter using Mid-point configuration. [pg 146~147]
Page 2
( 13 ) Explain with the help of a circuit diagram, the operation of a single-phase/
single-phase cycloconverter using Bridge configuration. [pg 150~151]
( 14) Draw the circuit diagram of a three-phase / single-phase cycloconverter
( non-circulating current type) and explain its working principle. [pg 153~154]
( 15 ) Draw the circuit diagram of a three-phase/ single-phase cycloconverter
( circulating current type) and explain its working principle. [pg 152~153]
( PROBLEMS )
( 16 ) The output frequency of a series inverter circuit varies from 3.144 kHz to
2.285 kHz corresponding to a change in the load from 50Ω to 125Ω . The time
period between the turn-off of one SCR and the turn-on of the other SCR is
0.2ms.Calculate the inductance and capacitance of the series inverter.
( 17 ) Calculate the output frequency of a series inverter in which inductance ,
capacitance and load resistance are 5mH ,1µf and 100Ω respectively. The time
period between the turn-off of one SCR and the turn-on of the other SCR is 0.2 ms.
If the load resistance varies between 50Ω and 125Ω, find the output frequency
range. [pg 109~110]
II CH ( 7 ) Motor Control
( 18 ) Explain with a neat circuit diagram, the operation of a zero voltage switch.
[ pg 6 ~ 7 ]
( 19 ) Explain with a neat circuit diagram, the principle of operation of the speed
control of a DC Series motor. [ pg 13 ~ 14 ]
( 20) Explain with a neat circuit diagram ,the principle of operation of the speed
control of a Shunt-wound DC motor ( Armature voltage control ). [ pg 11 ~ 12 ]
( 21) Draw a lamp dimmer circuit using a triac-diac combination and explain about
the operation. [ pg 17 ~ 18 ]
( 22 ) Explain with a neat circuit diagram ,the principle of operation of the speed
control of separately excited dc motor ( Armature voltage control method ).
[ pg 15 ~ 16 ]
Page 3
( 23 ) Explain how the speed control of a slip ring induction motor by mean of a
chopper-controlled resistance in the rotor circuit ( Rotor on-off control ) by using
circuit diagram . [ pg 24 ~ 25 ]
( 24 ) Explain how the speed control of induction motor by stator voltage control
method by using circuit diagram. [ pg 22 ~ 23 ]
( 25 ) (a) Explain about the Chopper control ( on-off ) of DC series motor and (b)
Advantages of AC motor control over DC motor control. [ pg 30 ,31 ~ 32 ]
( 26 ) Describe the construction and operating principle of the Variable reluctance
( VR ) stepper motor. [ pg 33 ~ 34 ]
( 27 ) Describe the operating principle of the permanent magnet or bipolar stepper
motor. [ pg 36 ,37 ~ 38 ]
( 28 ) Briefly explain with the principle of operation of the permanent magnet
hybrid ( PMH ) stepper motor . [ pg 40 ,41 ~ 42 ]
( 29 ) Describe with the help of a block diagram for the PLL method for speed
control System of a DC motor and explain the industrial applications of stepper
motors. [ pg 50 & pg 33 ]
( 30 ) Describe about the positioning Servo system using control Synchro.
[ pg 46 ~ 47 ]
( PROBLEMS )
31. Example ( 7- 4, 5 ) [ pg 28 ~ 29 ]
32. Example ( 7- 6, 7 ) [ pg 29 & pg 32 ]
33. A resistance of 1.5 Ω in a three-phase, 400 V slip ring induction motor is
connected in the rotor circuit. The speed is controlled by the chopper TRC system.
The effective value of the rotor resistance with the chopper in operation is 2.66
Ω.The chopper frequency and slip are 220 Hz and 3% respectively. Resistances
are referred to stator side. Calculate the additional resistance needed to be
connected during the chopper's non conducting time toff is 1.5 ms and find the total
torque.
B.Tech 2nd Year
EcE 4013 Digital Control System
1. Consider the open-lop system as shown in Figure 1. Calculate the unit impulse response of
the following system. The transfer function of the zero-order hold is
Go(s)=
(1 − e − sT )
S
Figure 1
Solution: Example 13.3
2. Consider the closed-loop system with unity feedback. Calculate the unit step response of
the following system. The transfer function of G(z) is
G(z)=
0.3678 z + 0.2644
z − 1.3678 z + 0.3678
2
Solution: Example 13.4
3. Consider the system with unity feedback , when T=1 and G(z)=
K (0.3678 z + 0.2644)
z 2 − 1.3678 z + 0.3678
Find the range of K that the system is stable.
Solution: Example 13.5
4. Consider a closed-loop sampled system as shown in Figure 2 when
K
s(0.1s + 1)(0.005s + 1)
Select T and K for suitable performance.
Gp(s)=
Figure 2
Figure 3
Solution: Example 13.6
5. Consider the system as shown in Figure 4 with D(z)=1 and Gp(s)=
of this system.
1
. Draw the root locus
s2
Figure 4
Solution: Example 13.8
6. Design a compensator D(z) that will result in a stable system when Gp(s)=
D(z)=
z−a
. Draw the root locus for this system as shown in figure 3.
z −b
Solution: Example 13.9
7.
State whether the following signals are discrete or continuous.
(a) Elevation contours on a map:
(b) Temperature in a room
(c) Digital clock display
(d) The source of a basketball game
(e) The output of the loudspeaker.
Solution: E13.1
8. (a) Find the values y(kT) when
z
Y(z)= 2
z − 3z + 2
for k=0 to 4. (b) Obtain a closed form of solution for y(kT) as a function of k.
Solution : E 13.2
9. A system has a response y(kT)=kT for k ≥ 0. Find Y(z) for this response.
Solution: E 13.3
10. We have a function
5
Y(s)=
s ( s + 1)( s + 5)
Using a partial fraction expansion of Y(s) , find Y(z), when T=0.2 second.
Solution: E13.4
11. Find the response for the first four sampling instants for
Y(z)=
z 3 + 2z 2 + 1
z 3 − 1.5 z 2 + 0.5 z
1
and
s2
Then, find y(0), y(1),y(2) and y(3).
Solution: E13.7
12. Determine whether the closed-loop system with T(z) is stable when
T(z)=
z2 + z
z 2 + 0.1z − 0.2
Solution: E13.8
13. (a)Determine y(kT) for k=0 to 3 when
z +1
z2 −1
(b)Determine the closed form solution for y(kT) as a function of k .
Y(z)=
Solution: E13.9
14. A system has G(z) as described by
K {( Z − E )[T − τ ( Z − 1)] + τ ( Z − 1) 2 }
G(z)=
( Z − 1)( Z − E )
−
T
/
τ
where E= e
with T=0.01 second and τ =0.008 second. (a) Find K so that the overshoot is less than
40%. (b) Determine the steady-state error in response to a unit ramp input. (c) Determine
K to minimize the integral squared error.
Solution: E13.10
15. A system has a plant transfer function
100
Gp(s)= 2
s + 100
(a) Determine G(z) for Gp(s) preceded by a zero-order hold with T= 0.05second.
(b) Determine whether the digital system is stable.
Solution: E13.11
16. Find the z-transform of
( s + 3)
X(s)= 2
s + 3s + 2
when the sampling period is 2 seconds.
Solution: E13.12
17. The characteristic equation of a sampled system is
z2 + K-1.5)z + 0.5 = 0
Find the range of K so that the system is stable.
Solution: E13.13
18. A unity feedback system as shown in Figure 2 has a plant
K
Gp(s)=
s ( s + 3)
with T=0.5. Determine whether the system is stable when K=5. Determine the maximum
value of K for stability.
Solution: E13.14
19. A closed-loop system has a whole circuit and process as shown in Figure 2. Determine
G(z) when T=1 and
2
Gp(s)=
s+2
Solution: P13.4
20. A closed-loop system has a whole circuit and process as shown in Figure 2.
2
Gp(s)=
s+2
let r(t) be a unit step input and calculate response of the system by synthetic division.
Solution: P13.5
21. For the output of the system , has a whole circuit and process as shown in Figure 2.
2
Gp(s)=
s+2
find the initial and final values of the output directly from Y(z).
Solution: P13.6
22. A closed-loop system is shown in Figure 2. This system represents the pitch control of an
aircraft. The plant transfer function is Gp(s) = K / [s(0.5s+1)]. Select a gain K and sampling
period T so that the overshoot is limited to 0.3 for a unit step input and the steady-state error
for a unit ramp input is less than 1.0.
Solution: P13.7
23. Consider a system as shown in Figure 5 with a zero-order hold and a plant
Gp(s)=
1
s ( s + 10)
and T= 0.1 second
(a) Let D(z) = K and determine the transfer function G(z)D(z). (b) Determine the
characteristic equation of the closed-loop system. (c) Calculate the maximum value of K
for a stable system. (d) Determine K such that the overshoot is less than 30%.
Figure 5
Solution P13.10
24. The transfer function of a plant and a zero-order hold (Figure 2) is
G(z)=
K ( z + 0.5)
z ( z − 1)
(a) Plot the root locus. (b) Determine the range of gain K for a stable system.
Solution: P13.12
25. The space station orientation controller is implemented with a sampler and hold and
has the transfer function (Fig.2)
G(z)=
K ( z 2 + 1.1206 z − 0.0364)
z 3 − 1.7358 z 2 + 0.8711z − 0.1353
(a) Plot the root locus. (b) Determine the value of K so that two of the roots of the
characteristic equation are equal. (c) Determine all the roots of the characteristic equation
for the gain of part (b).
Solution: P13.13
26. A closed-loop system with a sampler and hold, as shown in Figure 2, has a plant transfer
function
GP(s)=
10
s−2
Calculate and plot y(kT) for 0 ≤ T ≤ 0.6 when T=0.1 second. The input signal is a unit
step.
Solution: P13.15
27. A closed-loop system as shown in figure 13.18 has
1
s ( s + 1)
Calculate and plot y(kT) for 0 ≤ k ≤ 8 when T=1 second and the input is a unit step.
GP(s)=
Solution: P13.16
28. A closed-loop system as shown in Figure 2has
GP(s)=
K
s ( s + 1)
and T=1 second. Plot the root locus for K ≥ 0 , and determine the gain K that results in
the two roots of the characteristic equation on the z-circle (at the stability limit).
Solution: P13.17
29. A closed-loop system as shown in Fig 2 has a plant
GP(s)=
K (1 + as )
s2
where a is adjustable to achieve a suitable response. Plot the root locus when a=10.
Determine the range of K for stability when T=1 second.
Solution: AP13.1
30.A system of the form shown in Figure 2 has D(z) =K and
GP(s)=
27
s ( s + 27)
when T=0.1, find a suitable K for a rapid step response with an overshoot less than 10%.
Solution: AP13.4
30. A system of the form shown in Figure 13.18 has
GP(s)=
10
s +1
Determine the range of sampling period T for which the system is stable. Select a
sampling period T so that the system is stable and provides a rapid response.
Solution: P13.5
YANGAN TECHNOLOGICAL UNIVERSITY
DEPARTMENT OF ELECTRONIC ENGINEERING AND INFORMATION
TECHNOLOGY
SAMPLE QUESTIONS AND SOLUTIONS
( EcE 4014 ) RF AND MICROWAVE ENGINEERING
Page 1
( EcE 4014 ) RF and Microwave Engineering
I.( CH 2 ) Microwave Transistors
1. Explain about the bipolar transistor geometry and low-noise bipolar transistors. [ pg 59 ~ 60 ]
2. Briefly explain about the Microwave FETs. [ pg 61 ~ 62 ]
3. Explain about the noise performance by using the noise figure and frequency curve.[ pg 64 ]
II. ( CH 3 ) Microwave Amplifiers
4. Defined the Noise Factor , Noise Figure and Noise Temperature .
[ pg 68 ,69 ~ 70 ]
5.Explain about the Degenerative Parametric Amplifiers. . [ pg 77 ~ 78 ]
6.Explain about the Non-degenerative and Regenerative Parametric Amplifiers. [ pg 78 ~ 79 ]
7.Explain about the Manley-Rowe Relationships. . [ pg 79 ~ 80 ]
( ROPLEMS )
8.(i) A three stage amplifier ( A1 , A2 and A3 ) has the following gains :G1 =10 , G2 = 10 and
G3 = 25. The stages also have the following noise factors : F1 =1.4 , F2 = 2 ,and F3 = 3.6.
Calculate (a) the overall gain of the cascade chain in decibels, (b) the overall noise factor , (c)
the overall noise figure and (d) the overall noise temperature.
(ii) If the reverse position of amplifier 1 and 3 , calculate the above values. And compare the
results of question (i) and (ii).[ Example ( 3-2 ) ] . [ pg 73 ]
9. (i) A three stage amplifier ( A1 , A2 and A3 ) has the following gains :G1 =10 , G2 = 20 and
G3 = 10. The stages also have the following noise factors : F1 =1.7 , F2 = 3.5 ,and F3 = 3.5.
Calculate (a) the overall gain of the cascade chain in decibels, (b) the overall noise factor , (c)
the overall noise figure and (d) the overall noise temperature.
(ii) If the reverse position of amplifier 1 and 3 , calculate the above values. And compare the
results of question (i) and (ii).
10. Consider a parametric amplifier in which an output frequency ( f ) is the sum of the pump
signal ( fp ) and the input signal ( fs ) frequencies : f = fp + fs . Solve the Manley-Rowe
equations to determine if the network is stable.
[ Example ( 3-3 ) ][ pg 81 ]
III.CH ( 4 ) Hybrid and Monolithic Microwave Integrated Circuit Amplifiers
11. What are HMICs and MMICs? [ pg 83~ 84 ]
12. Explain about the Generic MMIC amplifier. [ pg 89 ]
Page 2
13. Explain about the attenuations in amplifier circuit . [ pg 91 ]
14. Explain about the combining MIC amplifiers in parallel. [ pg 99 ~ 100 ]
15. Explain about the Wilkinson power divider circuit . [ pg 100 ~ 101 ]
( PROBLEMS )
16. An amplifier (A1) with a 25 Ω output resistance drives a 50 Ω stripline transmission line ,
The other end of the stripline is connected to the input of another amplifier (A2 ) in which Ri =
100 Ω. (a) Calculate the maximum and minimum gain loss for this system , and (b) calculate the
range of system gain if G1 = dB and G2 = 10 dB.[ Example ( 4-6 ) ]
17. An amplifier (A1) with a 50 Ω output resistance drives a 90 Ω stripline transmission line ,
The other end of the stripline is connected to the input of another amplifier (A2 ) in which Ri =
50 Ω. (a) Calculate the maximum and minimum gain loss for this system , and (b) calculate the
range of system gain if G1 =20dB and G2 = 10 dB.
18. Two MIC amplifiers, A1 and A2 are connected in cascade. Amplifier A1 has a gain of 6 dB
and a noise figure of 4 dB; amplifier A2 has a gain of 7 dB and a noise figure of 4.5 dB.
Calculate the system noise figure.[ Example ( 4-7 ) ]
19. A MIC amplifier has two stages, A1 and A2 . Amplifier A1 has a gain of 20 dB and a noise
figure of 3 dB; amplifier A2 has a gain of 10 dB and a noise figure of 4.5 dB. Calculate the
system noise figure (a) when A1 is the input amplifier and A2 is the output amplifier and (b)
when A2 is the input amplifier and A1 is the output amplifier. What practical conclusions do you
draw from comparing these results?
20. An IF output amplifier require a Wilkinson power divider such circuit .Calculate the
resistance, capacitance and inductance values needed for this circuit to work in a 50Ω system at
70 MHz. .[ Example ( 4-8 ) ]
21. An IF output amplifier require a Wilkinson power divider such circuit .Calculate the
resistance, capacitance and inductance values needed for this circuit to work in a 50Ω system at
150 MHz.
22. An amplifier has a series feedback resistance of 5 Ω and a shunt feedback resistance of 500
Ω . Calculate the input and output impedance Ro. If the Re = 5 Ω calculate the voltage gain of
the amplifier. [ Example ( 4- 1 ,2 ) ]
IV. ( CH 7 ) Solid-State MMIC Waveguide Components
23. Explain about the Microstrip Directional Couplers. [ pg 248 ,249 ~ 250 ]
Page 3
24. Explain about the MMIC Microstrip Isolators. [ pg 269 ~ 270 ]
25. Explain about the MMIC PIN Diode Duplexers. [ pg 266 ~ 267 ]
26. Explain about the Microstrip Hybrid Rings. [ pg 241 ~ 242 ]
27. Explain about the Coaxial to MMIC Microstrip transitions. [ pg 236 ,237 ~ 238 ]
28. Explain about the MMIC PIN Diode Attenuators. [ pg 265 ]
29. Explain about the MMIC PIN Mixers. [ pg 260,261 ~ 262 ]
30. Explain about the Tapered Microstrip Lines. [ pg 246 ,247 ~ 248 ]
31. Explain about the Microstrip Line Filter for low pass filter. [ pg 250, 251 ~ 252 ]
32. Explain about the Microstrip Line Filter for high pass filter. [ pg 252 ~ 253 ]
Ministry of Science and Technology
Department of Technical and Vocational Education
Telecommunication Systems
EcE 4024
Questions, Examples, Problems
Semester II
Chapter - 1
Traffic Analysis
1.1.
Example 1.
Solution See Page 3,4
1.2.
Example 2.
Solution See Page 4, 5
1.3.
Example 3.
Solution See Page 5
1.4.
Example 4.
Solution See Page 6,7
1.5.
Problem 4.
Solution See Sample & Worked out Example Page 2,3
1.6.
Problem 5.
Solution See Sample & Worked out Example Page 4
1.7.
When a Data Frame (Packet) is Transmitted From a Souce (S) to a Destination (D), What
Would be the Causes for the Failure of Data Transmission? The packet is not delivered.
Why?
Solution : See Page 6
Chapter - 2
An Overview of Cellular System
2.1.
(a) Describe the Essential Elements of a Cellular System.
Solution See Page 10
2.1.
(b) Describe the Technologies for Second Generation Cellular Systems
(b) Solution See Page 12
2.2.
Write Short Notes the followings:
(i) N-AMPS (ii) TDMA (iii) E.TDMA (iv) CDMA
Solution See Page 13, 14, 15
2.3.
Write Short Notes the Followings.
(i) CT – 2
(ii) GSM
(iii) IS-54
(iv)IS-95
(v) JDC
Solution See Page 16, 18, 19, 20, 21
2.4.
Describe Proposed Teleservices for A Third Generation System.
Solution See Page 23
Chapter - 3
Access Technologies
3.1.
Problem
1.
Solution See Sample & Worked out Example Page 5
3.2.
Problem
2.
Solution See Sample & Worked out Example Page 5
3.3.
Problem
3.
Solution See Sample & Worked out Example Page 6
3.4.
Problem
4.
Solution See Sample & Worked out Example Page 7, 8
3.5.
Problem
6.
Solution See Sample & Worked out Example Page 8, 9
3.6.
Problem
3.1.
Solution See Sample & Worked out Example Page 35
3.7.
(a) Example 3.2
See Solution Page 36, 37
(b) Example 3.3
3.8.
(a) Example 3.4
See Solution Page 38, 39
(b) Example 3.5
3.9.
(a) Example 3.6 See Solution Page 45
(b) Example 3.7 See Solution Page 46
3.10.
Describe the advantage of FDMA and the disadvantages of FDMA
Solution Page 29, 30
3.11.
Describe the advantages of TDMA and the disadvantages of TDMA
Solution See Page 32
3.12.
Describe Comparisons of FDMA, TDMA, and DS-CDMA
Solution See Page 41
3.13.
Draw (i) AMPS frequency Band and Channel Assignments (ii) TDMA/FDD Channel
Architecture (ii) TDMA Frame
Solution See Solution Page 29, 31
3.14.
Explain Spectral Efficiency of Modulation and Another Definition of Spectral Efficiency
of Modulation.
Solution See Solution Page 33, 34
Chapter - 5
Fundamentals of Cellular Communications
5.1.
Example 5.1.
Solution See Page 86
5.2.
Example 5.2.
Solution See Page 90, 91
5.3.
Example 5.3.
Solution See Page 91, 92
5.4.
Example 5.4.
Solution See Page 92, 93
5.5.
Example 5.5.
Solution See Page 93, 94, 95
5.6.
Describe the Handoff Process for four Steps.
Solution See Page 100
5.7.
Problem 1 Solution See Sample and Worked out Example Page 10
5.8.
Problem 2 Solution See Sample and Worked out Example page 10, 11
5.9.
Draw Six Effective Interfering Cells of Cell 1.
Solution See Page 83
5.10.
Explain (i) Soft handoff (ii) Hard handoff
Solution See Page 99
Ministry of Science and Technology
Department of Technical and Vocational Education
EcE 4034 Digital Communication
Questions, Examples, Problems
B.Tech Yr. 2
Semester II
Chapter - 14
1.
Problem
14.1
Solution See Page 631, 632
2.
Problem
14.2
Solution See Page 650, 651, 652
3.
Problem
14.3
Solution See Page 652, 653, 654, 655
4.
Explain Definition of a Gausion Random process.
Solution See Page 633, 634, 635
5.
Explain about Optimum Signal Defection.:
Solution See Page 640, 641, 642
6.
Sketch another form of Optimum M-any receiver (a) Correlation Detector (b) Matched
Filter Detector. Describle Decision Regions and Evor Probability. Solution See Page 646,
647, 648, 649, 650
Chapter - 15
1.
Example
15.1
Solution See Page
- 687, 688
2.
Example
15.2
Solution See Page
- 688, 689, 690
3.
Example
15.3
Solution See Page
- 696, 697, 698
4.
Example
15.4
Solution See Page
- 702, 703
Chapter - 16
1.
Problem
16.1
Solution See Page 732
2.
Problem
16.2
Solution See Page 734, 735
3.
Problem
16.3
Solution See Page 739, 740
4.
Problem
16.4
Solution See Page 740, 741, 742
5.
Problem
16.5
Solution See Page 743, 744
Chapter - 7
1.
Briefly explain properties of line cording
No. 1. Solution See Page 297
2.
Describe Various Types of Transmission or Line Codes in Digital Data Transmission
No. 2.Solution See Page 297.
3.
Suchas on-off, polar, bipolar.
Explain On-off Signaling.
No.3 Solution: Page 304, 305, 306, 307 Fig 7.7
4.
What is Roll-off Factor? Explain, Relationship Between Theoretical Minimum Bandwidth
and Roll-off Factor.
No. 4. Solution See Page 313, 314
5.
What is Called Duobinary Pulse ? Explain Using Example of a Duobinary Pulse.
No. 5. Solution Page 317
6.
Draw Scrambler and Descrambler and Pulse Generation by Transversal Filter.
What is scrambler ? Describe Primary Purpose of Using Scrambler.
No. 6. Solution Page 319, 320, 321 Fig 7.18, 7.19
7.
Discuss Preamplifier and Equalizer.
Draw Block Diagram of Regenerative Repeater and zero-forcing Equalizer Analysis
No. 7. Solution Page 323, 324 Fig 720, Fig. 7.12
8.
Explain Timing Extraction and Draw Block Diagram of Timing Extraction
No. 8. Solution: Page 328, 329, Fig. 7-23
9.
Sketch Time-Division Multiplexing of Digital Signals (a) Digital Interleaving (b) Word
(or Byte) Interleaving (c) Interleaving Channel Having Different Bit Rate (d) Alternate
Scheme for
(e) No. 9. Solutions: Page – 344, Fig. 7.33
10.
Draw Block Diagram of North American Digital Hierarchy, CCITT Recommendation No.
10. Solution: Page 347, 348, Fig 7.36, 7.37
11.
Determine the Pulse Transmission Rate in Terms of the Transmission Bandwidth BT and
the Roll-off Factor . Assume a Scheme Using the Inquest Criterion.
No.11 Solution Page- 315, 316 Exp. 7.1
12.
The Data Stream 101010100000111 is fed to the Scrambler in Fig. 7.19 (a) Find the
Scrambler Output T, Assuming the Initial Content of the Register to be Zero
No. 12. Solution Page- 321, 322 Example 7.2
13.
For the Received Pulse Pr(t) in Fig 7.21 b, Let ao = Pr[0] = 1, a1’ = Pr [1] = -0.3,
a2 = Pr[2] = 0.1 a-1 = Pr[-1] = -0.2, a-2 = Pr[-2] = 0.05
Design a Three – Tap ( N = 1) Equalizer
No. 13 Solution Page 326 Example 7.3
14.
Derive Enor Probability for Polan Signal, on-off and Bipolar Signals.
No. 14. Solution: Page 331, 332, 333
15.
(a) Polar Binary Pulses are Received with Peak Amplitude Ap= 1 mV, The Channel Noise
rms amplitude is 192.3 µV. Thereshold detection is used, and 1 and 0 are equally Likely.
Find the Detection Error Probability.
(b) Find the Error Probability for (i) the on-off Case and (ii) The Bipolar Case if Pulses of
the Same Shape as in Part (a) are Used, But Their Amplitude are Adjusted So That The
Transmitted Power is The Same as in Part (a).
No. 15 (a) (b) Solution Page 333, 334