WCDMA3G_QPSKDataMap
Description: QPSK modulation
Library: 3GPPFDD 10-99, Spreading & Modulation
Class: SDFWCDMA3G_QPSKDataMap
Parameters
Name |
Description |
Default |
Type |
|---|---|---|---|
MappingRule |
mapping rule.: Map 0 to 1, Map 1 to 1, Do not map |
Map 0 to 1 |
enum |
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
inBit |
input bit stream |
int |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
2 |
out |
output mapped symbol |
complex |
Notes/Equations
- This model is used to form an orthogonal signal denoted by a complex symbol from the input bit stream. Each firing, one complex token is produced when two integer tokens are consumed.
- The following table shows the mapping algorithm; generally, Map 0 to 1 is used.
- DTX indication bits are neither 0 nor 1, when input bit is DTX indication, it will be mapped to 0. With another mapped bit 0, 1 or −1, a complex symbol is produced.
QPSK Mapping Rule
Map 0 to 1 Map 1 to 1 Do not map in out in out in out 0, 0 (1, 1) 0, 0 (-1, -1) 0, 0 (0, 0) 0, 1 (1, -1) 0, 1 (-1, 1) 0, 1 (0, 1) 1, 0 (-1, 1) 1, 0 (1, -1) 1, 0 (1, 0) 1, 1 (-1, -1) 1, 1 (1, 1) 1, 1 (1, 1) symbol (x, y) denotes a complex signal x + iy
References
- 3GPP Technical Specification, TS 25.213, V3.0.0, "Spreading and modulation (FDD)," October 1999.