homework 4_sol.pdf - 연세대학교 전기전자공학부 Communications Theory Homework Set#4 Solutions Assigned Due 23:59 Problem 1 시간축에서

# homework 4_sol.pdf - 연세대학교 전기전자공학부...

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1 연세대학교 전기전자공학부 Communications Theory Homework Set #4 Solutions Assigned: April 15, 2014 Due: April 29, 2014 23:59 Problem 1 시간축에서 continuous message signal 따라 PM, FM 신호가 결정되는데 서로 다른 종류 메시지를 표현할 있는 PM, FM modulated signal 그리라고 점에서 문제에 오류가 있습 니다 . 아래 예시와 같이 어떤 임의의 신호에 대해서 PM, FM modulated signal 가지 이상 려주신 분들 정답 처리 합니다 . Figure 4.2 Frequency and phase modulation of square and sawtooth waves.

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2 Problem 2 (1)     50 2 c f t f m t (2)   max 50 50 max 2 2 f f k m t Problem 3. 1) Since an angle modulated signal is essentially a sinusoidal signal with constant amplitude, we have 2 2 100 5000 2 2 c A P P  2) The maximum phase deviation is max max 4sin 2000 4 t 3) The instantaneous frequency is
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