User manual MATLAB SIGNAL PROCESSING BLOCKSET RELEASE NOTES

[. . . ] Signal Processing BlocksetTM Release Notes How to Contact The MathWorks Web Newsgroup www. mathworks. com/contact_TS. html Technical Support www. mathworks. com comp. soft-sys. matlab suggest@mathworks. com bugs@mathworks. com doc@mathworks. com service@mathworks. com info@mathworks. com Product enhancement suggestions Bug reports Documentation error reports Order status, license renewals, passcodes Sales, pricing, and general information 508-647-7000 (Phone) 508-647-7001 (Fax) The MathWorks, Inc. 3 Apple Hill Drive Natick, MA 01760-2098 For contact information about worldwide offices, see the MathWorks Web site. Signal Processing BlocksetTM Release Notes © COPYRIGHT 2004­2010 by The MathWorks, Inc. The software described in this document is furnished under a license agreement. The software may be used or copied only under the terms of the license agreement. [. . . ] This enhancement enables you to generate code for anything you can simulate using Signal Processing Blockset blocks. The only exception is the Sort block, which only supports code generation up to 32 bits for fixed-point and integer signals. 28 Version 6. 8 (R2008b) Signal Processing BlocksetTM Software New Biquad Filter Block A new Biquad Filter block has been added to the Signal Processing Blockset Filtering / Filter Designs library. This block allows you to implement IIR filters with optimized numerics. Increased N-Dimensional Support The following blocks now support N-D signals: · Downsample · DCT · FFT · IDCT · IFFT · Window Function New Data Type Support Table You can now access the Signal Processing Blockset Data Type Support Table through the Simulink model Help menu. The table provides information about data type support and code generation coverage for all Signal Processing Blockset blocks. Select Help > Block Support Table > Signal Processing Blockset or Help > Block Support Table > All Tables. As always, you can also type showsignalblockdatatypetable at the MATLAB command line to bring up the table. Rectangular ROI Support for Minimum and Maximum Blocks The Minimum and Maximum blocks now support Rectangular ROI (region of interest). See the block reference pages for more information. 29 Signal Processing BlocksetTM Release Notes Autocorrelation Block Provides Additional Fixed-Point Support The Autocorrelation block now supports the scaling of fixed-point signals. In previous releases, the block's Scaling parameter had to be set to None for fixed-point inputs. See the block reference page for more information. QR Factorization Block Supports Full-Sized Outputs The QR Factorization block now supports full-sized output matrices Q and R. This release adds the Output size parameter to enable you to select either Economy or Full outputs. Refer to the block reference page for more information. Counter Block Enhancements This release brings the following enhancements to the Counter block: · The former Clk port label is now Inc when the block is counting up, and Dec when the block is counting down. · The Inc/Dec port now supports 8-, 16-, and 32-bit signed and unsigned integer and fixed-point data types. · A new Max port was added to enable you to control the Counter size via an input port. · The Hit values parameter now accepts vectors as well as scalar values. · A new check is in place to require that the Hit values are integers. · A new check is in place to require Maximum count to be an integer. · A new check is in place to require Maximum count to be representable by the Count data type. Compatibility Considerations Because of the new checking on the Maximum count and Hit values parameters, your models might produce new errors. Change these signals to data types supported by each parameter. 30 Version 6. 8 (R2008b) Signal Processing BlocksetTM Software FFT Block Correctly Applies Divide-By-Two on Butterfly Outputs The Skip divide-by-two on butterfly outputs for fixed-point signals check box on the Fixed-point pane of the FFT block dialog has been moved to the Main pane and renamed Divide butterfly outputs by two. This check box now correctly applies to both fixed-point and floating-point inputs. In releases prior to R2008b, the block always ignored this check box for floating-point inputs. Compatibility Considerations The FFT block can give results in R2008b and later releases that are scaled differently than in previous releases when all the following conditions are met: · The block input is floating point. · The Divide butterfly outputs by two check box is selected (or the Skip divide-by-two on butterfly outputs for fixed-point signals check box on the Fixed-point pane was NOT selected, for releases prior to R2008b) . · The Logging mode parameter on the Fixed-Point Tool for the model is not set to Minimums, maximums and overflows. [. . . ] This block designs a vector quantizer using the Vector Quantizer Design Tool (VQDTool). Vector Quantizer Encoder The Vector Quantizer Encoder block is in the Quantizers library. This block finds the index of the nearest codeword based on a Euclidean or weighted Euclidean distance measure. Waterfall The Waterfall block is in the DSP Sinks library. This block enables you to view vectors of data over time. Zero Crossing The Zero Crossing block is in the Signal Operations library. This block counts the number of times a signal crosses zero. 72 Version 6. 0 (R14) Signal Processing BlocksetTM Software Enhanced Blocks This section gives a brief description of each of the block enhancements. Counter The Count data type parameter of the Counter block now supports signed and unsigned integers. Digital Filter The Digital Filter block now supports these additional filter structures: · FIR - Direct form symmetric Direct form antisymmetric Direct form I Direct form I transposed Direct form II · IIR Biquad (SOS) Every filter structure now supports fixed-point data types. [. . . ]