This version (24 May 2018 12:25) was approved by Venkatesan Krishnamoorthy.The Previously approved version (25 Jul 2017 12:12) is available.
Table of Contents
Multiply
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There are four kinds of multiplication supported.
- Multiply(Real Signals)
- Multiply(Complex Signals)
- Multiply(Complex-Real Signals)
- Multiply(Complex-Conjugate Complex Signals)
Multiply (Real Signals)
The Multiply block multiplies two signals together. This can be used for modulation or other design situations where a multiply operation is needed.
Right-click the block to add more pins by selecting Add Algorithm > IC N > Multiplication.
Care must be taken in using this block to avoid computational overflows, for example, putting in a value of 16 in 5.23 format, whose limit is 15.999999.
Multiply (Complex Signals)
This module can be used to multiply two complex signals in block schematic.
(x+iy) * (u+iv) = (xu - yv) + i(xv + yu)
Note:- The Context Menu “Input Source” option added to this module to select the algorithm for Complex FFT and Real FFT as shown below
Input Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Operand 1 | complex | Input complex signal 1 |
| Pin 1: Operand 2 | complex | Input Complex signal 2 |
Output Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Output Signal | Complex | Complex output signal |
Grow Algorithm
input pins can be grown up to 8 channels.
Multiply (Complex-Real Signals)
This module can be used to multiply one complex-one real signal in block schematic.
(x+iy) * r = (xr) + i (yr)
Input Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Complex Input | complex | Input complex signal |
| Pin 1: Real Input | Dec | Input Real Signal |
Output Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 2: Output Signal | Complex | Complex output signal |
Grow Algorithm
Grow Algorithm is not supported.
Add Algorithm is supported.
Multiply(Complex-Conjugate Complex Signals)
This module can be used to multiply one complex-one conjugate complex signal in block schematic.
(x+iy) * conj(u+iv) = (xu + yv) -i (xv - yu)
Note:- The Context Menu “Input Source” option added to this module to select the algorithm for Complex FFT and Real FFT as shown below
Input Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Complex Input | complex | Input complex signal 1 |
| Pin 1: Complex Input | Dec | Input Complex signal 2 |
Output Pins
| Name | Format [int/dec] - [control/audio] | Function Description |
|---|---|---|
| Pin 2: Output Signal | Complex | Complex output signal |
Grow Algorithm
Grow Algorithm is not supported.
Add Algorithm is supported.
Supported DSPs
ADAU145x (Block Schematic only)
Example Usage
This can be used to multiply two signals' FFT results as shown below.
resources/tools-software/sigmastudio/toolbox/basicdsp/multiply.txt · Last modified: 15 May 2018 11:49 by Sanjeeva Reddy