qam (MathScript RT Module Function)

LabVIEW 2012 MathScript RT模块帮助

版本日期:June 2012

产品编号:373123C-0118

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(仅限Windows)

Owning Class: communications

Requires: MathScript RT Module

Syntax

y = qam(x, m)

y = qam(x, m, phi)

y = qam(x, m, phi, type)

Legacy Name: qammod

Description

Modulates a sequence of integers into a series of Quadrature Amplitude Modulated (QAM) symbols.

Examples

Inputs

Name Description
x Specifies the sequence of integers to modulate. x is an I32 scalar, vector, or matrix in the range [0, m-1].
m Specifies to use m-ary QAM modulation. m should be a square of a power of 2.
phi Specifies the initial phase in radians. The default phi is 0.
type Specifies the method to map the integers to modulated symbols. type is a string that accepts the following values:

'Bin' (default) Uses binary mapping to the modulated symbols.
'Gray' Uses Gray-coded mapping to the modulated symbols.

Outputs

Name Description
y Returns the modulated symbols. y is a complex, double-precision, floating-point scalar, vector, or matrix.

Details

The following table lists the support characteristics of this function.

Supported in the LabVIEW Run-Time Engine Yes
Supported on RT targets Yes
Suitable for bounded execution times on RT Not characterized

Examples

X = randint(1, 1000, 16)
Y = qam(X, 16, 0, 'Gray')

Related Topics

padm
pam
qadm

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