|
|
|
| R2012a Documentation → Embedded Coder | |
Learn more about Embedded Coder |
|
| Contents | Index |
Embedded Coder/ Embedded Targets/ Processors/ Texas Instruments C6000/ Optimization/ C64x DSP Library
The C64x Complex FIR block filters a complex input signal X using a complex FIR filter. This filter is implemented using a direct form structure. Each input channel must contain an integer multiple of four samples, with four samples as the minimum required.
The number of FIR filter coefficients, which are given as elements of the input vector H, must be even. The product of the number of elements of X and the number of elements of H must be at least four. Inputs, coefficients, and outputs are all Q.15 data types. For each channel, the number of input elements must be a multiple of four.
The Complex FIR block supports discrete sample times and little-endian code generation only.
Specify the source of the filter coefficients:
Specify via dialog — Enter the coefficients in the Coefficients (H) parameter in the dialog box
Input port — Accept the coefficients from port H. This port must have the same rate as the input data port X. Choosing this option adds an input port to the block.
Designate the filter coefficients in vector format. There must be an even number of coefficients. This parameter is visible only when Specify via dialog is selected for the Coefficient source parameter. This parameter is tunable in simulation.
Lets you provide initial conditions for the filter. If your initial conditions for the channels are
All the same, enter a scalar that applies to all channels.
Different within channels but the same across channels, enter a vector containing the initial conditions for one channel. These conditions then apply to all channels. The length of this vector must be one less than the number of coefficients.
Different across channels, enter a matrix containing all initial conditions for every individual channel. The number of rows of this matrix must be one less than the number of coefficients, and the number of columns of this matrix must be equal to the number of channels.
You may enter real-valued initial conditions. Zero-valued imaginary parts will be assumed.
In simulation, the Complex FIR block is equivalent to the TMS320C64x DSP Library assembly code function DSP_fir_cplx. During code generation, this block calls the DSP_fir_cplx routine to produce optimized code.
C64x General Real FIR, C64x Radix-4 Real FIR, C64x Radix-8 Real FIR, C64x Symmetric Real FIR
Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
| © 1984-2012- The MathWorks, Inc. - Site Help - Patents - Trademarks - Privacy Policy - Preventing Piracy - RSS |
