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systems analysis and design
Systems Analysis And Design An Object Oriented Approach With UML 6th Edition Alan Dennis, Barbara Wixom, David Tegarden - Solutions
Using Eq. (1.93), compute (as a function of BJ/B) the crossover range for the radar in Problem
Repeat the second example in Section 1.9.1 (on pp. 38) with 2 = 4, = 1m, and R = 400Km.
A Milli-Meter Wave (MMW) radar has the following specifications: operating frequency fo=94GHz, PRF f = 15KHz, pulse width t = 0.05ms, peak power P, 10W, noise figure F = 5dB, circular = antenna with diameter D = 0.254m, antenna gain G = 30dB, target RCS = SC = 1m, system losses L = 8dB, radar scan
Let the maximum unambiguous range for a low PRF radar be Rmax (a) Calculate the SNR at (1/2)Rmax and (3/4)Rmax (b) If a target with = 10m exists at R = (1/2)Rmax what should the target RCS be at R = (3/4)Rmax so that the radar has the same signal strength from both tar- gets.
The atmospheric attenuation can be included in the radar equation as another loss term. Consider an X-band radar whose detection range at 20Km includes a 0.25dB/Km atmospheric loss. Calculate the corresponding detec- tion range with no atmospheric attenuation.
Consider a low PRF C-band radar operating at fo P = 5000MHz. The antenna has a circular aperture with radius 2m. The peak power is = 1MW and the pulse width is t = 2s. The PRF is fr = 250Hz, and the effective temperature is To = 600K. Assume radar losses L = 15dB and target RCS = 10m. (a) Calculate
Repeat the example in Section 1.8.1 (on pp. 32) with L = 5dB, F10dB, T = 500K, Tj 1.5s,d, 0.25, and R = 75Km. =
(on pp. 24) with P, = 1MW, G = 40dB, and = 0.5m.
Repeat the example in Section
Consider an L-band radar with the following specifications: operating frequency fo=1500MHz, bandwidth B = 5MHz, and antenna gain G = 5000. Compute the peak power, the pulse width, and the minimum detectable signal for this radar. Assume target RCS = 10m, the single pulse SNR is 15.4dB, noise figure
For the radar described in Problem 1.13, assume the minimum detect- able signal is 5dBm. Compute the radar maximum range for = 1.0, 10.0, 20.0m.
An L-band radar (1500 MHz) uses an antenna whose gain is G = 30dB. Compute the aperture size. If the radar duty cycle is d =and the average power is 25KW, compute the power density at range R = 50Km.
Compute the aperture size for an X-band antenna at fo = 9GHz. Assume antenna gain G = 10, 20, 30 dB.
An L-band pulsed radar is designed to have an unambiguous range of 100Km and range resolution AR 100m. The maximum resolvable Doppler frequency corresponds to target 350m/sec. Compute the maximum required pulse width, the PRF, and the average transmitted power if P = 500W.
(a) Develop an expression for the minimum PRF of a pulsed radar; (b) compute fr for a closing target whose velocity is 400m/s; (c) what is the min unambiguous range? Assume that = 0.2m.
A pulsed radar system has a range resolution of 30cm. Assuming sinu- soid pulses at 45KHz, determine the pulse width and the corresponding band- width.
Repeat the example in Section 1.8.1 (on pp. 32) with ,
Repeat the example in Section(on pp. 24) with ,, and .
Consider an L-band radar with the following specifications: operating frequency , bandwidth , and antenna gain. Compute the peak power, the pulse width, and the minimum detectable signal for this radar. Assume target RCS , the single pulse SNR is , noise figure , temperature , and maximum range .
For the radar described in Problem 1.13, assume the minimum detectable signal is . Compute the radar maximum range for.
An L-band radar (1500 MHz) uses an antenna whose gain is. Compute the aperture size. If the radar duty cycle is and the average power is , compute the power density at range.
Compute the aperture size for an X-band antenna at .Assume antenna gain .
An L-band pulsed radar is designed to have an unambiguous range of and range resolution . The maximum resolvable Doppler frequency corresponds to . Compute the maximum required pulse width, the PRF, and the average transmitted power if .
(a) Develop an expression for the minimum PRF of a pulsed radar; (b)compute for a closing target whose velocity is ; (c) what is the unambiguous range? Assume that .
The backscattered RCS for a corner reflector is given by sin 4 = 16a (sin0)+ ( 2 sin 0)) 0045 22 sin 0 This RCS is symmetric about the angle 0 = 45. Develop a MATLAB pro- gram to compute and plot the RCS for a corner reflector. The RCS at the 0 = 45 is = 8ab
The following table is constructed from a radar cross-section mea- surement experiment. Calculate the mean and standard deviation of the radar cross section. Number of samples 2 RCS, m 55 6 67 12 73 16 90 20 98 24 110 26 117 19 126 13 133 8 139 5 144 3 150
Design a cylindrical RCS calibration target such that its broadside RCS (cylinder) and end (flat plate) RCS are equal to 10m at f = 9.5GHz. The RCS for a flat plate of area A is = 4f A/c.
In Section 12.7 we assumed the elevation angle increment & is equal to zero. Develop an equivalent to Eq. (12.43) for the case when & # 0. You need to use a third order three-dimensional Taylor series expansion about the state (t, u, ) = (0, 0, 0) in order to compute the new round-trip delay
Derive Eq. (12.45) through Eq. (12.47).
Consider a synthetic aperture radar. You are given the following Dop- pler history for a scatterer: {1000 Hz, 0, -1000HZ} which corresponds to times {-10ms, 0, 10ms}. Assume that the observation interval is Tob = 20ms, and a platform velocity v = 200m/s. (a) Show the Doppler history for another
A side looking SAR takes on eight positions within an observation interval. In each position the radar transmits and receives one pulse. Let the distance between any two consecutive antenna positions bed, and define 8 = 2 (sin- sino) to be the one-way phase difference for a beam steered at angle o.
A side looking SAR is traveling at an altitude of 15Km; the elevation angle is =15. If the aperture length is L = 5m, the pulse width is t = 20s and the wavelength is = 3.5cm. (a) Calculate the azimuth reso- lution. (b) Calculate the range and ground range resolutions.
Consider a ay filter. We can define six transfer functions: H(z), H2(z), H3(z), H4(z), H(z), and H6(z) (predicted position, predicted velocity, predicted acceleration, smoothed position, smoothed velocity, and smoothed acceleration). Each transfer function has the form -1 az az az H(z) = -1 -2 The
11.19. Design a critically dampeda, when the measurement noise vari- ance associated with position is = 50m and when the desired standard deviation of the filter prediction error i
Using the result of the previous problem and Eq. (11.83), compute the steady-state errors for the a tracker with the inputs defined in Problem
Verify the results in Eqs. (11.99) and (11.100).
Using Eq. (11.83), compute a general expression (in terms of the transfer function) for the steady state errors when the input sequence is: = ul {0, 1, 1, 1, 1, ...} u2 = {0, 1, 2, 3, ...} u3 = {0, 1, 2, 3,... } u4 = {0, 13, 23, 33, ... }
Suppose that the state equations for a certain discrete time LTI sys- tem are [x (n + 1) x2(n+1) 0 = + w(n) -2-3 x(n) If y(0) = y(1) = 1, find y(n) when the input is a step function.
Prove the state transition matrix properties (i.e., Eqs. (11.30) through (11.36)).
A certain system is defined by the following difference equation: y(n)+4y(n-1)+2y(n-2) = w(n) Find the solution to this system for n > 0 and w = 8.
Consider the sum and difference signals defined in Eqs. (11.7) and (11.8). What is the squint angle po that maximizes (p = 0)?
Reproduce Fig. 11.13 for the squint angles defined in the previous problem.
Reproduce Fig. 11.11 for P = 0.05, 0.1, 0.15 radians.
Generate the delta/sum patterns for a 21-element linear array using the form VA j- where is the difference voltage pattern and V is the sum voltage pattern.
In Section 10.4.2 we showed how a DFT can be used to compute the radiation pattern of a linear phased array. Consider a linear of 64 elements at half wavelength spacing, where an FFT of size 512 is used to compute the pat- tern. What are the FFT bins that correspond to steering angles = 30, 45 ?
A linear phased array antenna consists of eight elements spaced with d = element spacing. (a) Give an expression for the antenna gain pattern (assume no steering and uniform aperture weighting). (b) Sketch the gain pat- tern versus sine of the off-boresight angle . What problems do you see is using
Consider an antenna with electric field intensity in the xy-plane E(c). This electric field is generated by a current distribution D(y) in the yz- plane. The electric field intensity is computed using the integral r/2 E(C) = D(y) exp(2j sinc) dy -r/2 where is the wavelength and r is the aperture.
Consider an antenna whose diameter is . What is the far field requirement for an X-band or an L-band radar that is using this antenna?
What are the factors in determining the type of object persistence format that should be adopted for a system?
In Section 18.7 we assumed the elevation angle increment & is equal to zero. Develop an equivalent to Eq. (18.43) for the case when +0. You need to use a third-order three-dimensional Taylor series expansion about the state (f, H, ) = (0, 0, 0) in order to compute the new round-trip delay
Validate Eq. (18.46).
A side looking SAR takes on eight positions within an observation interval. In each position, the radar transmits and receives one pulse. Let the distance between any two consec- utive antenna positions bed, and define 5 = 2 (sin- sino) to be the one-way phase dif- ference for a beam steered at
A side looking SAR is traveling at an altitude of 15Km; the elevation angle is 3 = 15. If the aperture length is L = 5m, the pulse width is t = 20s and the wavelength is = 3.5cm, (a) calculate the azimuth resolution, (b) calculate the range and ground range resolutions.
Some experts argue that change management is more important than any other part of system development.Do you agree or not? Explain.
Why are the ideas of psychological safety, blameless post-mortems, and a just culture important when performing a project team review?
Compare and contrast two major ways of providing system support.
What is the role of the operations group in system development?
Explain the trade-offs among selecting between the types of conversion in questions 4, 5, and 6.
What are the cultural issues of which developers should be aware?
How are the test cases developed for unit tests?
Why is it important to have end-user license agreements examined?
Describe the different approaches to access control.
Are some nonfunctional requirements more important than others in influencing the architecture design and hardware and software specification?
How do tablets, such as the iPad™, enable the paperless office?
What is meant by a green data center?
What is the problem with backyard recycling of e-waste?
What is e-waste?
What is an enchanted object? Give a set of examples of them.
What is meant by ubiquitous computing? How about the Internet of Things?
Compare and contrast the five types of interface evaluation.
When developing a virtual reality system, what are some of the issues that need to be addressed?
Name some of potential business applications of virtual reality.
What is virtual reality?
Name some of potential business applications of augmented reality.
What is augmented reality?
What is occlusion? Why is it an issue when developing multidimensional information visualizations? Augmented reality systems? Virtual reality systems?
What is gamification?
Why do people play games?
What are the unique n avigation controls, input mechanisms, and outputs that mobile computing supports?
Describe how invariants, preconditions, and postconditions are useful in input validation.
What are Krug's three design principles?
What is the most popular kind of database today?Provide three examples of products that are based on this database technology.
Describe the steps in object persistence design.
What are exceptions?
How are the alternative matrix and feasibility analysis related?28 . What is an RFP? How is this different from an RFI?
What are the differences between the time-andarrangements, fixed-price, and value-added contracts for outsourcin g?
What is systems integration? Explain the challenges.
What is an object wrapper?
Define connascence. How is it related to the ideas of encapsulation, coupling, and cohesion?
What is meant by class cohesion? What are the characteristics of ideal class cohesion?
Describe method cohesion.
Describe the difference between inheritance and interaction coupling.
What are the interrelationships among the functional, structural, and behavioral models that need to be tested?
Explain the primary difference between an analysis model and a design model.
How does a use case scenario relate to an instance sequence diagram?
How does a use case relate to a generic sequence diagram?
How does a use case scenario relate to an activity diagram?
How does a use case relate to an activity diagram?
What is the difference between an external and internal actor?
Describe how the use of activity diagrams with swimlanes are helpful in behavioral modeling.
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