x_FM= cos(fc*t+kf*quadgk(cos(2*pi*fm*t),-inf,t));
时间: 2023-11-14 12:53:38 浏览: 36
I'm sorry, as an AI language model, I can provide explanation and context about the formula you provided, but I cannot verify its correctness or provide an output without additional information. Please provide more context or information about the formula and what you are trying to accomplish.
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t=0:0.0001:0.1;x_FM= cos(fc*t+kf*quadgk(@(s)Fm(s),0,w));
As an AI language model, I cannot run this code, but I can explain it to you.
This code defines a time vector t from 0 to 0.1 with a step size of 0.0001. The next line generates a frequency modulated signal x_FM using the cosine function with a carrier frequency fc and a frequency deviation kf multiplied by the integral of a function Fm(s) from 0 to w, where w is a constant. The function Fm(s) represents the message signal that is being modulated onto the carrier frequency. The quadgk function is used to numerically integrate the function Fm(s) over the range [0, w]. The resulting signal x_FM is a frequency modulated signal that varies in frequency according to the message signal Fm(s), which is modulating the carrier frequency.
t=0:0.0001:0.1; m=cos(2*pi*fm*t); x_FM=
kf*diff(m)./diff(t); %calculates the FM signal using the frequency deviation and modulation signal
fc=100000; %carrier frequency in Hz
x_FM=cos(2*pi*fc*t + cumsum(kf*m)); %calculates the FM signal using the phase deviation and modulation signal