How do you demodulate FM signal in Matlab?

How do you demodulate FM signal in Matlab?

FM Modulate and Demodulate Sinusoidal Signal

  1. Copy Command Copy Code.
  2. fs = 1000; fc = 200; t = (0:1/fs:0.2)’;
  3. x = sin(2*pi*30*t)+2*sin(2*pi*60*t);
  4. fDev = 50;
  5. y = fmmod(x,fc,fs,fDev);
  6. z = fmdemod(y,fc,fs,fDev);
  7. plot(t,x,’c’,t,z,’b–‘); xlabel(‘Time (s)’) ylabel(‘Amplitude’) legend(‘Original Signal’,’Demodulated Signal’)

How do you do amplitude modulation in Matlab?

Examples

  1. Copy Command Copy Code. Set the sample rate to 100 Hz.
  2. fs = 100; t = (0:1/fs:100)’; Set the carrier frequency to 10 Hz.
  3. fc = 10; x = sin(2*pi*t); Modulate x using single- and double-sideband AM.
  4. ydouble = ammod(x,fc,fs); ysingle = ssbmod(x,fc,fs);
  5. sa = dsp.SpectrumAnalyzer(‘SampleRate’,fs, ‘
  6. sa(ysingle)

What is AM modulation and demodulation?

Modulation is the process of influencing data information on the carrier, while demodulation is the recovery of original information at the distant end of the carrier. A modem is an equipment that performs both modulation and demodulation.

How can we demodulate the frequency signal?

A simple and effective FM demodulation technique involves a high-pass filter (for FM-to-AM conversion) followed by an AM demodulator. A high-pass-filter-based FM demodulator is preceded by a limiter to prevent amplitude variations from contributing error to the demodulated signal.

How do you demodulate FM?

What does FM demodulation mean?

FM demodulation is a key process in the reception of a frequency modulated signal. Once the signal has been received, filtered and amplified, it is necessary to recover the original modulation from the carrier. It is this process that is called demodulation or detection.

How does AM demodulation work?

The synchronous AM demodulator uses a mixer or product detector with a local oscillator signal. The local oscillator signal is synchronised to the incoming signal carrier so that it produces no beat note with the incoming carrier. The sidebands of the AM signal are then demodulated to provide the required audio signal.

What are the three requirements for an AM demodulator?

The demodulator must meet three requirements: (1) It must be sensitive to the type of modulation applied at the input, (2) it must be nonlinear, and (3) it must provide filtering.

Where is AM used?

Amplitude modulation is mostly used in the form of electronic communication. Currently, this technique is used in many areas of communication such as in portable two-way radios; citizens band radio, VHF aircraft radio and in modems for computers.

What is demodulation frequency?

Frequency demodulation is the process of extracting an initially transmitted signal. This article will tell more about frequency demodulation. Modulation is the process of encoding information in a transmitted signal, while demodulation is extracting information from a transmitted signal.

What is the modulation index of AM?

The modulation index of an amplitude modulated wave is defined as the ratio of the amplitude of modulating signal (Em) to the amplitude of carrier wave (Ec) i.e., Amplitude modulation index, ma = For a modulated wave, ma=

What are types of AM detector?

There are two basic types of AM detector. An envelope detector uses rectification to produce a voltage proportional to the amplitude of the IF voltage. A “product” detector multiplies the IF signal by a reconstituted version of the carrier.

Why do we use AM?

Am is for the first person singular (I am), is is for the third person singular (he is, she is, it is) and are is for the first person plural (we are), the second person singular and plural (you are) and the third person plural (they are). Was/Were — These two verb forms are used for the past tense.

What is the formula for demodulation?

z = amdemod (y,Fc,Fs) returns a demodulated signal z, given the input amplitude modulated (AM) signal y, where the carrier signal has frequency Fc. The carrier signal and y have sampling frequency Fs. The modulated signal y has zero initial phase and zero carrier amplitude, resulting from a suppressed-carrier modulation.

What is a demodulated signal?

The demodulated signal is nearly identical to the original signal. Amplitude modulated input signal, specified as a scalar, vector, matrix, or 3-D array.

How do I use the MATLAB command to translate a website?

Run the command by entering it in the MATLAB Command Window. Web browsers do not support MATLAB commands. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: United States.

What is amplitude modulation?

Amplitude modulate the signal s. Demodulate the received signal. Plot the original and demodulated signals. The demodulated signal is nearly identical to the original signal. Amplitude modulated input signal, specified as a scalar, vector, matrix, or 3-D array.