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info
System object: comm.OFDMModulator
Package: comm
Provide dimensioning information for the OFDM method
Syntax
Y = info(H)
Description
Y = info(H) provides data dimensioning
information for the OFDM modulator System
object™, H.
It returns the expected dimensions for the:
Input data array
Pilot data array
Output data array
The output, Y, is a structure containing
the following three fields.
- Y.DataInputSize
Dimensions of the modulator input data, Ndata-by-Nsym-by-Nt, where Ndata is the number of data subcarriers such that Ndata = NFFT − NleftG − NrightG − NDCNull − Npilot − NcustNull.
Variable Definitions
Variable Description NFFT Number of subcarriers NleftG Number of subcarriers in the left guard band NrightG Number of subcarriers in the right guard band NDCNull Number of subcarriers in the DC null (either 0 or 1) Npilot Number of pilot subcarriers NcustNull Number of subcarriers used for custom nulls (applies only when the pilot indices property is a 3-D array) Nt Number of transmit antennas - Y.PilotInputSize
Dimensions of the pilot input array, Npilot-by-Nsym-by-Nt.
- Y.OutputSize
Dimensions of the modulator output data, (NFFT + NCP)×Nsym-by-Nt, where NCP is the length of the cyclic prefix.
