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| Contents | Index |
| Learn more about Communications Blockset |
This table summarizes what's new in Version 3.3 (R2006a):
| New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems | Related Documentation at Web Site |
|---|---|---|---|
| Yes Details below | Yes Summary | Bug
Reports Includes fixes. | No |
New features and changes introduced in this version are
The Multipath Rician Fading Channel block is updated with a new algorithm that is more accurate. The block can now simulate a line-of-sight Doppler component that is independent from the Doppler of the diffuse components. Sample time is now inherited.
Added an option to the Multipath Rician Fading Channel block that allows for use of the channel visualization tool.
The Viterbi Decoder block now decodes codewords with punctures and/or erasures.
The Convolutional Encoder block now outputs punctured codewords.
It is also updated to allow trellis termination by appending tail bits.
The M-PSK Modulator Baseband, M-PSK Demodulator Baseband, Rectangular QAM Modulator Baseband, and Rectangular QAM Demodulator Baseband (only for square QAM) blocks now have an option for user-defined constellation mapping.
The M-PSK Demodulator Baseband, Rectangular QAM Demodulator Baseband (for square QAM only), BPSK Demodulator Baseband, QPSK Demodulator Baseband, and M-PAM Demodulator Baseband blocks are enhanced to run significantly faster.
Many blocks are updated to support C data types. See Data Type Support and individual block reference pages for details.
The Phase/Frequency Offset block now accepts the frequency offset information through an input port.
The new block operates without any delay (the previous version had a sample delay of 1), and now accepts real inputs in addition to complex inputs. It accepts inputs of data type double or single, and its output data type matches that of its input.
The Reed Solomon Decoder block is enhanced to run significantly faster.
The demo dvbs2 is added, showcasing the state-of-the-art channel coding scheme used in the second generation Digital Video Broadcasting standard (DVB-S.2).
Added a feature that warns you of the existence of obsolete Communications blocks when a model is opened.
The Rician Fading Channel block has been obsoleted. Its replacement, the Multipath Rician Fading Channel block, is found in commchan3.
It now resides in the library commchan2, which is obsolete and may be removed in the future.
The SSB AM Modulator Passband and SSB AM Demodulator Passband blocks now output signals whose dimensions match those of their inputs.
Previously, inputs with dimensions [1] and [1x1] would result in outputs with dimension [1]. For such inputs, the blocks will now output signals with dimensions [1] and [1x1], respectively.
The Communications Blockset has a saveas_commblks utility function to migrate models to previous releases. This is now obsoleted.
Simulink provides a similar functionality through its Save As... option in the File menu of its models, as well as its function save_system.
Although saveas_commblks will continue to work in this release, we recommend that the Simulink functionality be used, as saveas_commblks will not be updated in the future.
 | Version 3.4 (R2006b) Communications Blockset Software | Version 3.2 (R14SP3) Communications Blockset Software |  |
Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
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