CCONV

CCONV - real/complex spectrum conversions

The format of the input X and the desired format of the output Y are defined by the two inputs XTYPE and YTYPE. The input C is used as factor or dB offset. All combinations of input and output types are possible. If a real spectrum (Power, Linear, Logarithmic) is converted to a complex spectrum, the imaginary part is always set to zero for all components. If the input is a complex spectrum and the output is a real spectrum, the output vector length is the half of the input vector length (and vice versa). If the input is a single number, the output is a vector with two entries (if YTYPE = 0) or a single number. If XTYPE is set to COMPLEX the input C can also be a vector. In this case X is the real and C the imaginary data. If XTYPE is COMPLEX and C is a number then X is interpreted as alternating real and imaginary data.

Usage:

CCONV X C XTYPE YTYPE

Inputs:

X

The input data (spectrum).

C

A factor or vector.

XTYPE

The type of input spectrum. The following values are supported:

COMPLEX|0 - the input is a complex spectrum (re/im value pairs).

POWER|1 - the input is a power spectrum. LINEAR|2 - the input is a linear magnitude spectrum. LOGARITHMIC|3 - the input is a logarithmic spectrum (dB).

YTYPE

The type of output spectrum. See XTYPE for details.

Outputs:

Y

The output data (converted spectrum).