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MT Add AWGN (G Dataflow)

Last Modified: January 9, 2017

Generates zero-mean, complex additive white Gaussian noise (AWGN) with uniform power spectral density and adds it to the complex baseband modulated waveform.

This node returns a signal-plus-noise waveform with a user-specified E b /N 0 , where E b represents the energy per bit, and N 0 represents the noise variance.

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input complex waveform

The modulated complex baseband waveform data.

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t0

Trigger (start) time of the Y array.

Default: 0.0

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dt

Time interval between data points in the Y array.

Default: 1.0

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Y

The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.

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samples per symbol

Number of samples per information symbol in the input complex waveform.

Default: 16

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bits per symbol

The number of bits per symbol in the modulation format underlying the input complex waveform. For example, the number of bits per symbol in quadrature-phase shift keying (QPSK) is 2.

Default: 1

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eb/n0

The desired E b /N 0 of the output complex waveform in dB.

Default: 10

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seed in

The reseeding of the noise sample generator (when reset? is set to TRUE) . When seed in is greater than 0, the AWGN generator is reseeded using the seed you set. Use a value of -1 to reseed the AWGN generator with a random seed.

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Note  

The value of seed in is disregarded when reset? is set to FALSE.

Default: -1 (0xFFFFFFFF)

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error in

Error conditions that occur before this node runs. The node responds to this input according to standard error behavior.

Default: no error

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reset?

A Boolean that determines whether the node continues applying AWGN using the previous iteration states.

TRUE Reseeds the AWGN generator.
FALSE Maintains the previous state of the AWGN generator.

Default: TRUE

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output complex waveform

The signal-plus-noise complex baseband waveform data returned by this node.

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t0

Trigger (start) time of the Y array.

Default: 0

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dt

Time interval between data values in the Y array.

Default: 1.0

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Y

The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.

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seed out

A seed for use in the seed in parameter during the next call to this node when reset? is set to FALSE.

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error out

Error information. The node produces this output according to standard error behavior.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported


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