Hi, this question is from Prof to Prof in radio telecom.It is known that the suppressed carrier of double-sideband suppressed-carrier AM signal (DSB-SC, not DSB-RC or with a pilot) can be recovered (frequency and phase) from the two sidebands by one of the two methods: “Costas Loop based on I & Q” and “the Squaring Method based on selective filter”. Both make the DSB-SC demodulator rather complex and/or sensitive in comparison to other detectors. There is a third method which is much simpler and not sensitive. It is not known yet by any university in the world since it uses the conventional simple Phase Locked Loop; phase comparator, RC filter and VCO. Obviously a minor change is added to the PLL, otherwise and as we all know, the loop cannot be locked to the suppressed carrier at its input. So I wonder if there is a university that might be interested to include this third very simple method in its course of communications. Perhaps it is time not to keep telling the graduate students that DSB-SC is harder to demodulate than the SSB-SC though the former takes twice its bandwidth! For instance, I used to hear this statement since I was at the university in the 70’s. Just in case, I prepared the new loop circuit, on the simulator LTspice, which demodulates a DSB-SC at 455 KHz (AM IF) as an example. Thanks.

 

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Hi, Tutor!! Could you please help me the statistics??? I’ll appretiate it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

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Hi tutor, I wanted to see if you can help me with the History questions below

2How did the early American colonies fare?

3the Revolution war was shifted to the south. Why?

4What were the 3 branches of the American government consist of?

5What were the primary crops grown in the south?

6What were the midatlantic slave trade?

7what were the relationships like between the native Americans and the Europeans powers before the American revolution?

8 What was the first great awakening? What were the Ramifications of it?

9 what were the ramifications of the french-Indian war?

10 what were the obstacles to ratifying the constitution?

11 what was the Declaration and what was its intent?

12.why did the french established a settlements in the new world?

13.what were the plans for the legislature and how were they negotiated successfully?

14 who were Anti-federalists? And what did they oppose?

15 what advantages did the Americans have during the Revolutionary war? What weakness did they have? what advantages did the British have? And what were their weakness?

16 what were the articles of confederation and why did the they cease to exist?

17.what is Shay’s Rebellion? why did it occur?

18 what sides did the colonies take during the revolutionary war? And what were they fighting for? And how did it reslove for both sides?

19 how did the north attempt to appease southern politicians during the constitutional convention? How did it ultimately favored the southern states?

20 what battle do many historians consider the turning point of the revolutionary war? And why

21 how did the colonies attempt to end the war as soon as it started? and why?

what was the Boston Tea party and why did it happen?

 

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Hi Tutors,

Any chance you can help with these 3 questions? Thanks

Use the following information for Motion Research, Inc. (MRI) for this and the following two questions.

Sales$200,000Costs$105,000SG&A$20,000Depreciation$16,000Dividend paid$6,000Retained Earnings Added$18,000Total Assets$85,000Equity$45,000Tax Rate35%

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