{blockLibraryPP_blocksPP_FF_RFFF_IdealizedSS_BasebandFF_FilterPP_label}
Filter complex RF broadband signals.
blockType: Filter
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Path in the library: |
Description
Block {blockLibraryPP_blocksPP_FF_RFFF_IdealizedSS_BasebandFF_FilterPP_label} It is a filter of complex radio frequency (RF) broadband signals. To design a filter, you can use the Butterworth, Chebyshev methods, or the Chebyshev inverse method. You can also simulate a filter in the time or frequency domain and plot its characteristics.
Additional information
Algorithms
Determination of FIR filter coefficients
The program calculates the coefficients of a discrete FIR filter using the parameters RF frequency (Hz) and FIR filter length, as well as the transfer function specified using the obtained poles and zeros of the filter.
To determine the coefficients of the direct form of the Discrete FIR Filter block, the following steps are performed:
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The frequency points located in the passband centered around the carrier frequency are determined by the formula:
Where
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– carrier frequency, in Hz;
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– FIR filter length;
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– time step of the filter.
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The values of the transfer functions for the frequency points specified in step 1 are determined by the formula:
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The coefficients of a discrete FIR filter are determined by the formula: