An AM modulator is operating with an index of 0 8 The modulating signal is m(t) 2 cos(2f m t) cos(4f m t) 2 cos(10f m t) (a) Sketch the spectrum of the modulator output showing the weights of all impulse functions (b) What is the efficiency of the modulation process ...

a By plotting m t or by using a rootfinding algorithm we see that the minimum value of m t is M 34 ...

An AM modulator is operating with an index of 0.8. The modulating signal is m(t) = 2

Question:

An AM modulator is operating with an index of 0.8.
The modulating signal is

m(t) = 2 cos(2πf_mt) + cos(4πf_mt) + 2 cos(10πf_mt)

(a) Sketch the spectrum of the modulator output showing the weights of all impulse functions.
(b) What is the efficiency of the modulation process?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Principles of Communications Systems, Modulation and Noise

ISBN: 978-8126556793

7th edition

Authors: Rodger E. Ziemer, William H. Tranter

See More Books

Question Posted: Sep 14, 2018 11:29 AM

See More Questions

The positive portion of the envelope of the output of an AM modulator is shown in Figure 3.33. The message signal is a waveform having zero DC value. Determine the modulation index, the carrier...
Figure shown the circuit diagram of a balanced modulator, the input applied to the top AM modulator is m (t), where as that applied to the lower AM modulator is m (t); these two modulators have the...
An AM modulator has output x c (t) = 25 cos[2(150)t] + 5 cos[2(160)t] + 5 cos[2(140)t] Determine the modulation index and the efficiency.
Is an oil pipeline a simplex system, a half-duplex system, a full-duplex system, or none of the above? What about a river or a walkie-talkie-style communication?
An article in the Wall Street Journal in 2015 reported that the interest rate on five-year German government bonds had become negative: "The negative yield means investors are effectively paying the...
What are control activities for information processing, and what purpose do they serve? How do general and application IT controls differ?
Examine how the rank of the stoichiometric matrix can be used to reduce the number of equations to be solved. For example, if there are $n_{\mathrm{s}}$ components and $n_{\mathrm{r}}$ equations...
Ruhe Auto Supplies began operations in 1998. The company's inventory purchases and sales in the first and subsequent years of operations are as follows: The company's federal income tax rate is 30...
Houston - based Advanced Electronics manufactures audio speakers for desktop computers. The following data relate to the period just ended when the company produced and sold 4 1 , 0 0 0 speaker sets:...
Assume the following data for Quality Care Dry Cleaning for the year ended December 31. Gross earnings $355,600.00 All employees salaries are greater than $7,000 in the fi rst quarter of employment...
Consider the system shown in Figure 3.35. Assume that the average value of m(t) is zero and that the maximum value of |m(t)| is M. Also assume that the square-law device is defined by y(t) = 4x (t) +...
An AM modulator has output x c (t) = A cos[2(200)t] + B cos[2(180)t] +B cos[2(220)t] The carrier power is P 0 and the efficiency is E ff . Derive an expression for E ff in terms of P 0 , A, and B....
The microbiome is a collection of microbes, such as bacteria and viruses, that live in/on the human body. Sites of colonization include the skin, nasal passages, mouth, and gut. Links between the...
a. One variation of Instant Insanity is a puzzle with five blocks instead of four. How many arrangements are possible? b. If you carry out one arrangement every second, how much time is required to...
What are the different approaches to test the sensitivity of a CBA model?
An investment aimed at introducing an augmented reality solution to improve the experience of a museum visit is ex-post evaluated using a CBA. A contingent valuation survey is carried out to museum...
Define probability.
What are shadow prices? Please describe the main caveats in their estimation. Under which conditions, shadow prices can be computed as Lagrange multipliers of a constrained planning problem?
The dataset FloridaLakes is introduced in Data 2.4 on page 68, and we return to the dataset in Exercise B.45 on page 315. To see if there is evidence of a negative correlation between pH in lakes and...
A circular concrete shaft liner with Youngs modulus of 3.4 million psi, Poissons ratio of 0.25, unconfined compressive strength 3,500 psi and tensile strength 350 psi is loaded to the verge of...
The planar surface z = 0 is a brass-Teflon interface. Use data available in Appendix C to evaluate the following ratios for a uniform plane wave having = 4 10 10 rad/s: (a) Tef / brass ; (b) Tef...
A uniform plane wave in free space has electric field vector given by E s = 10e jx a z + 15e jx a y V/m. (a) Describe the wave polarization. (b) Find H s . (c) Determine the average power density in...
Consider a left circularly polarized wave in free space that propagates in the forward z direction. The electric field is given by the appropriate form of Eq. (100). Determine (a) The magnetic field...
Give an example of one piece of financial information that may be used differently for two stakeholders (users) and explain how it would be used and presented differently?
Complete common -size statements (balance sheets) using the data below on page 246. You will be required to create a spreadsheet in MS Excel to display the statements (balance sheets).? In a 1 to 2...
A sail boat in the Great South Bay travels 2 miles east and then 4 miles south to get to Fire Island. What is its distance and displacement?

An AM modulator is operating with an index of 0.8. The modulating signal is m(t) = 2

Question:

Step by Step Answer:

a By plotting m t or by using a rootfinding algorithm we see that the minimum value of m t is M 34...View the full answer

Principles of Communications Systems, Modulation and Noise

Students also viewed these Physics questions