Question 1
Marks : +2 | -2
Pass Ratio : 100%
The disadvantage of preset equalizer is that
Explanation: The disadvantage of preset equalization is that it requires an initial training period that must be invoked at the start of any new transmission. Also time varying channel can degrade system performance due to ISI, since the tap weights are fixed.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The over-determined set of equations can be solved using
Explanation: The matrix x in transversal equalizer if non square with dimensions 4N+1 and 2N+1. Such equations are called as over-determined set. This can be solved by two methods called as zero forcing method and minimum mean square error method.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The index value n, in transversal filter can be used as.
Explanation: The index n can be used as both time offset and the filter coefficient identifier, which is the address in the filter.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Explanation: The receiver uses preamble for detecting the start of transmission, to set automatic gain control, and to align internal clocks and local oscillator with the received signal.