User manual MATLAB COMMUNICATIONS BLOCKSET RELEASE NOTES

[. . . ] Communications 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. Communications BlocksetTM Release Notes © COPYRIGHT 2000­2010 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 means that if you use Real-Time Workshop to build an RSim executable, then you can tune selected parameters without recompiling the model. This is useful for Monte Carlo simulations in which you run the simulation multiple times (perhaps on multiple computers) with different amounts of noise. The table below indicates, for different modes of the block, which parameters are tunable. Mode Eb/No Es/No Tunable Parameters Eb/No, Input signal power Es/No, Input signal power 52 Version 3. 0 (R14) Communications BlocksetTM Software Mode SNR Variance from mask Tunable Parameters SNR, Input signal power Variance For more information about the RSim target, see the Real-Time Workshop documentation set. New Demos New demos in Release 14 are listed in the table below. You can open the demos by finding them in the Demos pane of the MATLAB Help browser or by entering the corresponding model names in the MATLAB Command Window. Title Convolutional Encoder with Uncoded Bits and Feedback Soft-Decision GMSK Demodulator Adjacent and Co-Channel Interference Adaptive Equalization Using Embedded MATLAB Gardner Timing Phase Recovery MSK Signal Recovery IEEE 802. 11a WLAN Physical Layer Physical Layer Model of the cdma2000® Standard Defense Communications: US MIL-STD-188-110B Model Name conv_encoderdemo gmsk_softdecision adjcochanint equalizer_eml gardner_vfracdelay msk_sync wlan80211a cdma2000_phlayer milstd_188110Bmodel Demonstration models have also been reorganized into categories to make it easier for you to find relevant demos. You can view the categories using the Demos pane of the MATLAB Help browser. 53 Communications BlocksetTM Release Notes Changes in BCH Encoder and BCH Decoder The BCH Decoder block has been changed such that the second output port is optional and the error-correction capability is no longer a parameter. Also, this block and the BCH Encoder block no longer accept sample-based inputs. Compatibility Considerations If you built models with earlier versions of these two blocks, then you should · Resave the models using Release 14, to avoid producing Simulink warnings. · Revise the models so that the inputs to the BCH blocks are frame-based column vectors rather than sample-based vectors. To change the shape or frame status of a signal, you can use the Reshape block in Simulink, or the Frame Status Conversion (Obsolete) block in the Signal Processing Blockset. Because the outputs from the BCH blocks are now frame-based column vectors, you might need to revise other parts of your model as well. Changes in Fading Channel Blocks Compatibility Considerations The Multipath Rayleigh Fading Channel and Rician Fading Channel blocks are designed to process only sample-based scalars or frame-based column vectors. In Release 13, the blocks mistakenly accepted sample-based column vectors as input. In Release 14, the blocks correctly produce an error message if the input signal is a sample-based vector or a matrix. Changes in Integrators The new Communications Filters library contains a new Integrate and Dump block and a new Windowed Integrator block. Compatibility Considerations These blocks behave differently compared to the respective blocks of the same names in Release 13. The new Integrate and Dump block 54 Version 3. 0 (R14) Communications BlocksetTM Software · Does not reduce the sum modulo a constant. The Absolute value bound parameter is not part of the new block. · Does not require you to enter the sample time in the dialog box. The Sample time parameter is not part of the new block. · Measures the Integration period parameter value in samples, not seconds. · Can process sample-based scalars and frame-based matrices, but not sample-based vectors of length greater than 1. In a frame-based matrix, a given column is interpreted as a set of samples from a single channel. · Can optionally discard a specified number of input samples at the beginning of the simulation. In frame-based mode, the number of samples to discard can be different for each channel (column) of the input matrix. [. . . ] The Scrambler and Descrambler blocks no longer have a state output. The PN Sequence Generator block produces output from the last register in the generator, not the first. · The Convolutional Encoder and Viterbi Decoder blocks have new interfaces because they can now accept a more general trellis description of a convolutional encoder. · The Version 1. 4 Error Rate Calculation block considers a vector input to be a sample, whereas the current block considers a vector input to be a frame of multiple samples. [. . . ]