The symbol mapper takes consecutive bits and maps them to appropriate constellation points
Keywords
digital, electrical, unidirectional
Ports
| Name | Type |
|---|---|
| modulation | Digital Signal |
| output I | Electrical Signal |
| output Q | Electrical Signal |
Properties
General Properties
| Name | Default value | Default unit | Range |
|---|---|---|---|
|
name Defines the name of the element. |
Modulation Symbol Mapper | - | - |
|
annotate Defines whether or not to display annotations on the schematic editor. |
true | - | [true, false] |
|
enabled Defines whether or not the element is enabled. |
true | - | [true, false] |
|
type Defines the element unique type (read only). |
Modulation Symbol Mapper | - | - |
|
description A brief description of the elements functionality. |
The symbol mapper takes consecutive bits and maps them to appropriate constellation points | - | - |
|
prefix Defines the element name prefix. |
MAP | - | - |
|
model Defines the element model name. |
- | - | - |
|
library Defines the element location or source in the library (custom or design kit). |
- | - | - |
|
local path Defines the local path or working folder $LOCAL for the element. |
- | - | - |
|
url An optional URL address pointing to the element online help. |
- | - | - |
Standard Properties
| Name | Default value | Default unit | Range |
|---|---|---|---|
|
configuration Defines whether or not to enable I and Q ports. |
dual output | - | [dual output, single output |
|
load map from file Defines whether or not to load IQ values from an input file or to use the currently stored values. |
false | - | [true, false] |
|
symbol map filename The file containing user defined IQ values. Refer to the Implementation Details section for the format expected. |
- | - | - |
|
modulation type Defines the input signal modulation scheme. The user can choose between different standard modulation schemes. |
2PAM | - | [user defined, 2PAM, 4PAM, 8PAM, 16PAM, BPSK, QPSK, 8PSK, 8QAM, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM |
|
symbol map table The table allows the user to read or modified a symbol map by changing the position of one or more symbols. |
<2,2> [-1, 1, 0,...] | - | - |
|
scale factor I The output signal scale factor. |
1 | - | (0, +∞) |
|
scale factor Q The output signal scale factor. |
1 | - | (0, +∞) |
|
bias The DC offset added to the amplitude of the output signal. |
0 | a.u. | (-∞, +∞) |
|
rotation The rotation angle rotates the output IQ values |
0 | rad | (-∞, +∞) |
|
rise period The ratio of the bit period required for the response to rise from 10% to 90% of its final value. |
0.05 | - | (0, 1] |
|
fall period The ratio of the bit period required for the response to fall from 90% to 10% of its final value. |
0.05 | - | (0, 1] |
Simulation Properties
| Name | Default value | Default unit | Range |
|---|---|---|---|
|
output signal mode The output signal mode. |
%output signal mode% | - | [sample, block |
|
sample rate The sample rate of the generated signal. This is typically set by the global properties in the root (top-most) element. |
%sample rate% | Hz | [0, +∞) |
====================================
Implementation Details
Please see Optical PAM-4 in Advanced Modulation Format Transceivers for detailed information.
Please see also the example file 4PAM_Symbol_Map.icp.