Modulate signal using OFDM method
The OFDMModulator
object modulates a signal using the
orthogonal frequency division modulation method. The output is a baseband representation of
the modulated signal.
To modulate a signal using OFDM:
Create the comm.OFDMModulator
object and set its properties.
Call the object with arguments, as if it were a function.
To learn more about how System objects work, see What Are System Objects?.
creates an OFDM
modulator System object™.hMod
= comm.OFDMModulator
specifies Properties using one of more
name-value pair arguments. Enclose each property name in quotes. For example,
hMod
= comm.OFDMModulator(Name
,Value
)comm.OFDMModulator('NumSymbols',8)
specifies eight OFDM symbols in
the time-frequency grid.
sets the OFDM modulator system object properties based on the specified OFDM demodulator
system object hMod
= comm.OFDMModulator(hDemod
)comm.OFDMDemodulator
.
assigns the pilot signal, waveform
= hMod(data
,pilot
)pilot
, into the frequency subcarriers
specified by the PilotCarrierIndices property value of the hMod
system
object. To enable this syntax set the PilotCarrierIndices property to true
.
To use an object function, specify the
System object as the first input argument. For
example, to release system resources of a System object named obj
, use
this syntax:
release(obj)
[1] Dahlman, Erik, Stefan Parkvall, and Johan Sköld. 4G LTE/LTE-Advanced for Mobile Broadband. Amsterdam: Elsevier, Acad. Press, 2011.
[2] Andrews, J. G., A. Ghosh, and R. Muhamed. Fundamentals of WiMAX. Upper Saddle River, NJ: Prentice Hall, 2007.
[3] Agilent Technologies, Inc., “OFDM Raised Cosine Windowing”, http://rfmw.em.keysight.com/wireless/helpfiles/n7617a/ofdm_raised_cosine_windowing.htm.
[4] Montreuil, L., R. Prodan, and T. Kolze. “OFDM TX Symbol Shaping 802.3bn”, https://www.ieee802.org/3/bn/public/jan13/montreuil_01a_0113.pdf. Broadcom, 2013.
[5] “IEEE Standard 802.16TM-2009,” New York: IEEE, 2009.