Keysight Pathwave 89600 VSA .NET API
IsOfdmErrorVectorBeforeIdftDespread Property
See Also 
Agilent.SA.Vsa.CustomOfdm.Interfaces Assembly > Agilent.SA.Vsa.CustomOfdm Namespace > MeasurementExtension Class : IsOfdmErrorVectorBeforeIdftDespread Property


Glossary Item Box

Gets or sets a value indicating whether the OFDM error vector is before IDFT despread.

Syntax

Visual Basic (Declaration) 
Public Overridable Property IsOfdmErrorVectorBeforeIdftDespread As Boolean
C# 
public virtual bool IsOfdmErrorVectorBeforeIdftDespread {get; set;}
C++/CLI 
public:
virtual property bool IsOfdmErrorVectorBeforeIdftDespread {
   bool get();
   void set (    bool value);
}

Property Value

The default value is false.

Remarks

When MultipleAccessScheme is MultipleAccessScheme.Dft, the data is DFT spread before they are mapped to the OFDM subcarriers; When IsPilotDefinedInTimeDomain is true, the pilot is DFT spread before they are mapped to the OFDM subcarriers; When data and pilot are allocated on the same symbol, both of them are DFT spread, and if their allocated subcarriers are adjacent to each other, the pilot and data are DFT spread together and mapped back to the allocated subcarriers. When VSA demodulates the OFDM signal, it first converts the time domain signal to frequency domain, then if either data or pilot or both of them are DFT spread, VSA converts these channels to modulation domain by IDFT despreading and calculates EVM. But the error vector results of these channels can be calculated either before the IDFT despreading or after the IDFT despreading. When the error vector is calculated before IDFT despreading, the error vector reflects the impairments in frequency domain; When the error vector is calculated after IDFT despreading, the error vector reflects the impairments in modulation domain or time domain. This parameter controls whether the data or pilot or both are IDFT despread when calculating the error vector.

Requirements

Target Platforms: Windows 11 Professional or Enterprise; Windows 10 Professional, Enterprise, or Education (64-bit)

Minimum Software Version Requirement: Keysight PathWave 89600 VSA Ver 28.60

See Also