BigFourEx

This worksheet is an unlimited-attempt review material that features channel effects. Below, there is a combination of multiple-choice , true-or-false , and cloze items. This page is interactive, and no data will be uploaded when answering this page. Questions Consider a linear time invariant channel with amplitude response S ( f ) = 0.2 1.64 − 1.6 c o s ( 2 π f ) . Suppose that the channel input has the form x ( n ) = 3.7 c o s ⁡ ( 2 π 0.02 n ) for all n from −∞ to +∞. The channel output can be written as y ( n ) = A c o s ⁡ ( 2 π 0.04 n + ϕ ) where − π ≤ ϕ ≤ π . What is the numerical value of A? Please provide your answer in at least 3 significant figures. Which of the following statements is/are true: Lossy compression reduces the effects of bit errors. Channel cod...

Questions Markscheme

Questions Markscheme

Questions Markscheme

Questions Markscheme

This worksheet is an unlimited-attempt review material that features channel effects. Below, there is a combination of multiple-choice , true-or-false , and cloze items. Due to the interactive nature of this page, this worksheet can’t be printed out directly; no data will be uploaded by filling in this worksheet. Questions An LTI system models the following effects: attenuation, delay, offset, and blurring of transitions offset, and blurring of transitions delay, and offset delay, and blurring of transitions Suppose we transmit binary bits over a given LTI channel using two different communication protocols. Protocol A uses a bit time of 5 microseconds, and protocol B uses a bit time of 20 microseconds. If all other aspects of the protocols are the same, then Protocol B will have less ISI. If a shorter bit time was used, bit rate increases decreases ...