Block: LookupTable2D



PIC




Inports


x

Table index in x direction



y

Table index in y direction






Outports


Out

Table output






Mask Parameters


TableData

Look-up table data



DimX

Number of data points in x-direction



DimY

Number of data points in y-direction




Description:

Two dimensional look-up table with selectable number of data points.

Table data must be an array of size DimX*DimY.

FiP: Input range is from -1 to 1

Float: Input range is from 0 to dimension-1. If input is out of range, output will be cut off (no extrapolation).

The table of the LookupTable2D block must contain DimX times DimY data points and they have to be arranged as

TableData = [f(x1,y1),f(x2,y1),...f(xn-1,y1),f(xn,y1),
f(x1,y2),f(x2,y2),...f(xn-1,y2),f(xn,y2),
...
f(x1,ym-1),f(x2,ym-1),...f(xn-1,ym-1),f(xn,ym-1),
f(x1,ym),f(x2,ym),...f(xn-1,ym),f(xn,ym)]

with n as selected DimX and m as selected DimY values.

For periodic signals, the last entries per dimension must be identical to the first entries in this dimension, see the example in the following figure.


PIC


For non-periodic signals there is no restriction regarding the last data points, see the example in the figure below.


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Implementations:
FiP16 16 Bit Fixed Point Implementation
FiP32 32 Bit Fixed Point Implementation
Float32 32 Bit Floating Point Implementation
Float64 64 Bit Floating Point Implementation

Implementation: FiP16


16 Bit Fixed Point Implementation



Inports Data Type


x

int16



y

int16






Outports Data Type


Out

int16




Implementation: FiP32


32 Bit Fixed Point Implementation



Inports Data Type


x

int32



y

int32






Outports Data Type


Out

int32




Implementation: Float32


32 Bit Floating Point Implementation



Inports Data Type


x

float32



y

float32






Outports Data Type


Out

float32




Implementation: Float64


64 Bit Floating Point Implementation



Inports Data Type


x

float64



y

float64






Outports Data Type


Out

float64