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    <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> &gt;&gt; <a href="section_e54aa8aac34aa55341e8b4b782fe1a74.html">FOSSEE Signal Processing Toolbox</a> &gt; modulate</span>

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    <div class="refnamediv"><h1 class="refname">modulate</h1>
    <p class="refpurpose">Modulates signal according to the modulation method</p></div>


<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3>
   <div class="synopsis"><pre><span class="default">y</span><span class="default">=</span><span class="functionid">modulate</span><span class="default">(</span><span class="default">x</span><span class="default">,</span><span class="default">fc</span><span class="default">,</span><span class="default">fs</span><span class="default">,</span><span class="default">method</span><span class="default">,</span><span class="default">opt</span><span class="default">)</span>
<span class="default">[</span><span class="default">y</span><span class="default">,</span><span class="default">t</span><span class="default">]=</span><span class="functionid">modulate</span><span class="default">(</span><span class="default">x</span><span class="default">,</span><span class="default">fc</span><span class="default">,</span><span class="default">fs</span><span class="default">,</span><span class="default">method</span><span class="default">,</span><span class="default">opt</span><span class="default">)</span></pre></div></div>

<div class="refsection"><h3 class="title">Parameters</h3>
   <dl></dl></div>

<div class="refsection"><h3 class="title">Description</h3>
   <p class="para">[y,t]=modulate(x,fc,fs,method,opt)
Returns the modulated vector y and the time vector &#0039;t&#0039;
Modulation is performed according to the following table
METHOD              MODULATION SCHEME
&#0039;am&#0039;,      Amplitude modulation, double side-band, suppressed carrier
&#0039;amdsb-sc&#0039; opt not used. This is the default method.
&#0039;amdsb-tc&#0039; Amplitude modulation, double side-band, transmitted carrier
opt is a scalar subtracted from x before multiplying x
with the carrier wave.  It defaults to min(min(x)) so that
the input signal after offset is always non-negative
&#0039;amssb&#0039;    Amplitude modulation, single side-band
OPT not used.
&#0039;fm&#0039;       Frequency modulation
opt is the constant of frequency modulation.
opt = (fc/fs)*2*pi/max(max(abs(x))) by default
&#0039;pm&#0039;       Phase modulation
OPT is the constant of phase modulation.
opt = pi/max(max(abs(x))) by default
Phase lies between -pi and +pi
&#0039;pwm&#0039;      Pulse width modulation
opt=&#0039;left&#0039; corresponds to left justified pulses.
opt=&#0039;centered&#0039; correspondes to centered pulses.
The default value of opt is &#0039;left&#0039;.
&#0039;ppm&#0039;      Pulse position modulation
opt is a scalar between 0 and 1 which specifies the pulse
width in fractions of the carrier period with default value 0.1.
&#0039;qam&#0039;       Quadrature amplitude modulation
opt is a matrix of the same size as X which is modulated in
quadrature with x.</p>
   <p class="para">If x is a matrix, its columns are modulated.
Example
y  =</p>
   <p class="para">1.    1.    0.    0.
Author
Ankur Mallick</p></div>
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