Map bipolar signal into unipolar signal in range [0, M-1] - Simulink - 金宝app,下载188bet金宝搏,金宝搏官方网站

Description

The Bipolar to Unipolar Converter block maps the bipolar input signal to a unipolar output signal. If the input consists of integers in the set {-M+1, -M+3, -M+5,...,M-1}, whereMis theM-ary numberparameter, then the output consists of integers between 0 and M-1. This block is only designed to work when the input value is within the set {-M+1, -M+3, -M+5,...,M-1}, where M is theM-ary numberparameter. If the input value is outside of this set of integers the output may not be valid.

The table below shows how the block's mapping depends on thePolarityparameter.

Polarity Parameter Value	Output Corresponding to Input Value of k
`Positive`	(M-1+k)/2
`Negative`	(M-1-k)/2

Parameters

M-ary number

The number of symbols in the bipolar or unipolar alphabet.

Polarity

A value ofPositivecauses the block to maintain the relative ordering of symbols in the alphabets. A value ofNegative导致块反向的相对排序of symbols in the alphabets.

Output Data Type

The type of bipolar signal produced at the block's output.

The block supports the following output data types:

Inherit via internal rule
Same as input
double
int8
uint8
int16
uint16
int32
uint32
boolean

When the parameter is set to its default setting,Inherit via internal rule, the block determines the output data type based on the input data type.

If the input signal is floating-point (eithersingleordouble), the output data type is the same as the input data type.
If the input data type is not floating-point:
- Based on theM-ary numberparameter, the output data type is the ideal unsigned integer output word length required to contain the range [0 M-1] and is computed as follows:
  ideal word length = ceil(log2(M))
- The block sets the output data type to be an unsigned integer, based on the smallest word length (in bits) that can fit best the computed ideal word length.

Note

的选择Hardware Implementation Pane(Simulink)pane pertaining to word length constraints do not affect how this block determines output data types.

Examples

If the input is [-3; -1; 1; 3], theM-ary numberparameter is4, and thePolarityparameter isPositive, then the output is [0; 1; 2; 3]. Changing thePolarityparameter toNegativechanges the output to [3; 2; 1; 0].

If the value for theM-ary numberis 2⁸the block gives an output of uint8.

If the value for theM-ary numberis 2⁸+1 the block gives an output of uint16.