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Version 6.3 (R14SP2) Signal Processing Toolbox Software

This table summarizes what is new in Version 6.3 (R14SP2):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems	Related Documentation at Web Site
Yes Details below	Yes — Details labeled as Compatibility Considerations, below. See also Summary	Bug Reports Includes fixes	No

New features and changes introduced in this version are organized by these topics:

• FDATool and FVTool Changes

• dfilt Changes

• Spectral Analysis Changes

• Other Changes

FDATool and FVTool Changes

FDATool Spectral Rejection Masks Added

You can draw lines on your filter response in FDATool to indicate rejection areas.

FDATool Generated C Header File Complex Filter Support

FDATool now supports generating C header files for complex filters.

FDATool Tip of the Day Added

A new Tip of the Day dialog displays when you start FDATool. It contains tips and hints for using FDATool.

FDATool State Space Filters Support Removed

FDATool no longer supports state space filters.

Compatibility Consideration.   If you load a saved FDATool session that contains a state space filter, it is converted to a direct-form II transposed filter.

FDATool/FVTool New Analysis Parameters Magnitude Response Options

Three new options have been added to the Analysis Parameters for magnitude response displays.

• Normalize Magnitude to 1 (0 dB) — displays the magnitude so that the maximum magnitude value occurs at 0 dB

• Autoscale axes — automatically scales the response data y-axis

• dB Display Range — If you are not using autoscale and the magnitude display is in dB, this allows you to specify the y-axis limits, .

FVTool SOS Filter Coefficients Display Enhancement

The coefficient view in FVTool now displays each section of a second-order section filter as a separate filter with its own numerator, denominator, and gain.

FVTool Default Phase Units Changed

The default units for the phase response in FVTool have been changed to radians. This is consistent with the phasez function.

Compatibility Consideration.   You should verify that the FVTool phase plots generated by existing code display the desired units.

dfilt Changes

dfilt Coefficients Method Changed

The dfilt coefficients method has been changed to the coeffs method, which returns a structure. See the Methods section of dfilt for information.

Compatibility Consideration.   You should update any code that uses the coefficients method to use the new coeffs method and its returned structure.

dfilt Filter States Changed to Use States Property

You cannot pass filter states (initial and final conditions) via the dfilt filter method. You must use the states property. See dfilt for more information.

Compatibility Consideration.   You should update any code that passed filter states via the dfilt filter method to use the new states property.

Spectral Analysis Changes

spectrogram Function Replaces specgram

spectrogram has been added to replace the grandfathered specgram function. If you use this function with no outputs, a surface plot is displayed, instead of an image.

Compatibility Consideration.   You should update any code that references specgram to use the new spectrogram function. spectrogram uses different default values than specgram and the order of the inputs has changed.

Spectral Analysis Functions Inputs Changed

pwelch (and the other spectrum analysis functions) no longer accept 'half' or 'whole'. You must use 'onesided' or 'twosided' to indicate the type of analysis you want.

Compatibility Consideration.   You should update any code that uses 'half' or 'whole' with spectral analysis functions and instead use 'onesided' or 'twosided', respectively.

PSD Objects and Function Output Plots Changed

The following functions and methods now generate standard MATLAB plots, instead of launching an interactive plot. Refer to the MATLAB documentation for information on plots.

• dspdata plot method

• spectrum psd, pseudospectrum, and msspectrum methods

• pburg

• pcov

• periodogram

• pmcov

• pmtm

• pwelch

• pyulear

Other Changes

gaussfir Function Replaces firgauss

gaussfir has been added to replace the grandfathered firgauss function. gaussfir uses parameters that are common to communications systems.

Compatibility Consideration.   You should update any code that references firgauss to use the new gaussfir.

firpm and cfirpm Inputs Changed

The firpm and cfirpm functions now take function handles as inputs instead of strings.

Compatibility Consideration.   You should update any code that uses firpm or cfirpm so that it will work correctly with function handle inputs instead of string input.

New Demos

Signal Processing Toolbox demos have been reorganized and a new demo on the analysis of a numerically controlled oscillator (NCO) has been added.

Filter Wizard Product Dependency Removed

The Filter Wizard no longer requires Signal Processing Blockset software. You can use the Filter Wizard if you have Signal Processing Toolbox software and Simulink installed. If you have Signal Processing Blockset software installed, more options are available. See dspfwiz for more information.

Version 6.4 (R14SP3) Signal Processing Toolbox Software

Version 6.2.1 (R14SP1) Signal Processing Toolbox Software

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