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SignalProcessing

  

PoissonWindow

  

multiply an array of samples by a Poisson windowing function

 

Calling Sequence

Parameters

Options

Description

Thread Safety

Examples

Compatibility

Calling Sequence

PoissonWindow( A, alpha )

Parameters

A

-

Array of real or complex numeric values; the signal

alpha

-

real numeric constant

Options

• 

container : Array, predefined Array for holding results

• 

inplace : truefalse, specifies that output should overwrite input

Description

• 

The PoissonWindow( A, alpha ) command multiplies the Array A by the Poisson windowing function, with parameter α, and returns the result in an Array having the same length.

• 

The Poisson windowing function wk with parameter α is defined as follows for a sample with N points.

wk=ⅇα2kN1

• 

Before the code performing the computation runs, A is converted to datatype float[8] or complex[8] if it does not have one of those datatypes already. For this reason, it is most efficient if A has one of these datatypes beforehand. This does not apply if inplace is true.

• 

If the container=C option is provided, then the results are put into C and C is returned. With this option, no additional memory is allocated to store the result. The container must be an Array of the same size and datatype as A.

• 

If the inplace or inplace=true option is provided, then A is overwritten with the results. In this case, the container option is ignored.

Thread Safety

• 

The SignalProcessing[PoissonWindow] command is thread-safe as of Maple 18.

• 

For more information on thread safety, see index/threadsafe.

Examples

withSignalProcessing:

N1024:

aGenerateUniformN,1,1

_rtable18446884424072515822

(1)

PoissonWindowa,1.23

_rtable18446884423934196062

(2)

cArray1..N,datatype=float8,order=C_order:

PoissonWindowArray1..N,fill=1,datatype=float8,order=C_order,0.72,container=c

_rtable18446884423934184374

(3)

u`~`logFFTc:

useplotsindisplayArraylistplotℜu,listplotℑuend use

Compatibility

• 

The SignalProcessing[PoissonWindow] command was introduced in Maple 18.

• 

For more information on Maple 18 changes, see Updates in Maple 18.

See Also

SignalProcessing