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Question :
What is the ISM band and what is particular about this frequency band? Name two wireless technologies that make use of the ISM frequency band.
a) Explain the following spread spectrum techniques:
i) Frequency Hopping Spread Spectrum ii) Direct Sequence Spread Spectrum
b) Describe the functioning of a Bluetooth piconet? Include the discussion of the concept of Master, slave, stand-by and parked devices in your description of the Bluetooth piconet.
c) Compare the given features of Bluetooth, Ultra Wide Band and WiFi:
Data rate, Coverage (distance covered), Application focus.
d) Consider the security aspects in both Wireless Local Area Networks (WLANs) and Wireless Personal Area Networks (WPANs).
i) What are the security problems introduced in Wireless LANs and Wireless PANs?
ii) What level of security can the IEEE 802.11 and Bluetooth standards provide?
Explain the process of manufacturing ordinary Portland cement by vertical shaft rotary kiln method and write chemistry of hardening and setting of it with chemical equations. D
RE-HEAT (AFTER BURNING) Re-heat is a system fitted to a gas turbine engine as a means of increasing the total thrust. As much as twice the thrust can be obtained using reheat.
function of 8279
Suppose you have $50,000 that you want to invest in two companies, Bethlehem Books and Allentown Audio. Bethlehem has a return of 10% and standard deviation 15%, while Allentown ha
career aspiration as a determinant to senior secondary school students performance in Technical drawing.
If the light source in figure 12.1 (see figure below) of the Warren Smith text is replaced by a 100W light bulb, and the lens aperture is 20cm, what would the 1cm detector at point
Guidance Control system The control aspect of the guidance system is intended to stabilise the behaviour of the airframe. The fact that the guidance system will always h
A heat recovery device involves transferring energy from hot flue gases passing counter currently through an annular region to pressurized water flowing through the inner tube of t
Fire risk assessment in USA: The document NFPA 551:2010 is entitled Guide for the Evaluation of Fire Risk Assessments. In this document is set out the American use of the
The town of Smog, Idaho is located in a river valley and has a footprint of 6 km x 2 km. It has an average daily emission rate of 1000 kg/day of PM2.5 into the atmosphere from wood
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