HW10 - ECE 200 Fall 2007 Homework 10 Transmission and...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 200 – Fall 2007 – Homework 10 Transmission and Reception of Radio Signals 1. An analog multiplier chip generates an output waveform proportional to the time- domain product of two or more input signals. If the two input signals applied to the multiplier are given by ) 1000 2 ( cos ) 10 ( ) ( 1 t V t v ! = and ) 300 2 ( cos ) 1 ( ) 200 2 ( cos ) 2 ( ) 100 2 ( cos ) 3 ( ) ( 2 t V t V t V t v + + = , then the output will be ). ( ) ( ) ( 2 1 12 t v t v t v = (a) Calculate and sketch the power spectrum of the input signals. (b) Calculate and sketch the power spectrum of the signal at the output. 2. An AM signal is generated using the signals of the previous problem ) mod ) ( ) ( , ) ( ) ( ., . ( 2 1 signal ulating t v t v and signal carrier t v t v e i m c ! = ! = and by applying a DC offset voltage of V V DC 5 = to the modulating signal. (a) Roughly sketch the magnitude spectrum of the AM signal. (b) Calculate the signal power in Watts and dBW at each frequency and show the results on a frequency spectrum plot (i.e. power spectra in both units).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This homework help was uploaded on 03/20/2008 for the course ECE 200 taught by Professor Escuti during the Fall '07 term at N.C. State.

Page1 / 4

HW10 - ECE 200 Fall 2007 Homework 10 Transmission and...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online