A#12 - Assignment #12 p.1 ECSE-2410 Signals & Systems -...

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Assignment #12 – p.1 ECSE-2410 Signals & Systems - Spring 2009 Due Fri 03/06/09 1(32). Speech scramblers are designed to prevent electronic eavesdropping. The input voice, , is made unintelligible by altering the original spectrum, ) ( t x = else X , 0 1000 , 1000 1 ) ( ω . The garbled output is then transmitted to a receiver at the listening end. The receiver (not shown) sequentially undoes all the frequency spectrum alterations done at the transmitter. ) ( t y Highpass Filter Lowpass Filter H 1 ( ) H 2 ( ) 1 1 x ( t ) a ( t ) b ( t ) c ( t ) y ( t ) -2000 0 2000 -1500 0 1500 cos(2000 t ) cos(3000 t ) For the transmitter filtering operations shown in the block diagram above, sketch (a)(8). Sketch ) ( A . Show all amplitudes and frequencies. Label all axes. (b)(8). Sketch B ( ) and label the axes. (c)(8). Sketch C ( ) and label all important points. (d)(8). Sketch Y ( ) and label all important points.
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Assignment #12 – p.2
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This note was uploaded on 05/03/2009 for the course ECSE 2410 taught by Professor Wozny during the Spring '07 term at Rensselaer Polytechnic Institute.

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A#12 - Assignment #12 p.1 ECSE-2410 Signals & Systems -...

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