102_1_hw06

102_1_hw06 - 1 EE102 Spring 2009-10 Lee Systems and Signals...

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Unformatted text preview: 1 EE102 Spring 2009-10 Lee Systems and Signals Homework #6 Problem Set Due: Tuesday May. 25 5PM 1. Single Sideband (SSB) Communication The double sideband (DSB) systems require a transmission bandwidth that is twice the sig- nal bandwidth. In this question we’ll look at a system where the transmission bandwidth and signal bandwidth are the same. The system is plotted below: × m ( t ) cos ( ! c t ) × cos ( ! c t ) m ( t ) Propagation Transmitter Receiver 2 Ideal Bandpass Ideal Lowpass x ( T ) y ( T ) z ( T ) (a) H ( j ! ) The signal m ( t ) is first modulated by cos( ω c t ) , and then passed through an ideal bandpass filter. The spectrum of the input M ( jω ) and the frequency response of the ideal bandpass filter H ( jω ) are- 2 ! B 2 ! B ! 2 ! B ! c- ! c !- ! c ! c 2 ! B (b) (c) 1 M ( j ! ) H ( j ! ) The modulated signal is x ( t ) , and the output of the ideal bandpass is y ( t ) . This signal is transmitted, and processed by a synchronous receiver....
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This note was uploaded on 12/09/2010 for the course EE ee102 taught by Professor Levan during the Spring '09 term at UCLA.

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102_1_hw06 - 1 EE102 Spring 2009-10 Lee Systems and Signals...

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