| Version 3.5 (R2007a) Communications Blockset™ Software Release Notes Release Notes | |
This table summarizes what's new in Version 3.5 (R2007a):
| 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
Fixed-Point Capabilities Added to Rectangular QAM Demodulator Block
Bitwise Soft-Decision Outputs Enabled for General QAM Demodulator Block
BCH Encoder and Decoder Blocks Allow User Specification of Primitive and Generator Polynomials
Default Output Data Type Settings Added to AM/PM Demodulator Blocks
New Default Output Data Type Option Added to Viterbi Decoder Block
M-FSK Modulator Block Errors When Used with Sample-Based Signals and Multitasking Solver
PN Sequence Generator Block Allows Mask Bits from Input Port
Binary-Output RS Decoder and Binary-Input RS Encoder Blocks Enhanced
The LDPC Encoder and LDPC Decoder blocks are added. These are based on the same algorithms used in the Communications Toolbox functions fec.ldpcenc and fec.ldpcdec.
The Rectangular QAM Demodulator Baseband block now has fixed-point capabilities for hard-decision square QAM modes.
Bitwise soft-decision outputs are enabled for the General QAM Demodulator Baseband block.
The operational parameters of the following filters can now be adjusted for fixed-point data types:
The Convolutional Encoder block now accepts and outputs ufix1.
The Error Rate Calculation is upgraded to accept inputs of fixed-point data types.
The BCH Encoder and BCH Decoder blocks now allow user specification of the primitive and generator polynomials.
They have also been enhanced to speed up initialization.
The option 'Inherit via internal rule' is added to the output data-type option, and is set to be the default setting in the following blocks:
See individual block reference pages for details.
There are no compatibility issues, as only new instances of the block will be set to the default output, leaving the settings of currently used blocks unchanged.
The option 'Inherit via internal rule' is added to the output data-type option in the Viterbi Decoder block, and is set to be the default setting. See block reference page for details.
There are no compatibility issues, as only new instances of the block will be set to the default output, leaving the settings of currently used blocks unchanged.
This change was made to ensure that the M-FSK Modulator block produces correct output.
With this change, a model with the M-FSK Modulator block will not run if it is used for sampled-based signals with Tasking mode for periodic sample times set to Auto or MultiTasking. For sample-based input signals, Tasking mode for periodic sample times (in Simulation > Configuration Parameters > Solver) should be set to SingleTasking.
An option is added to the PN Sequence Generator block that gives the choice of providing output mask information through either the block dialog or an input port.
The Binary-Output RS Decoder and Binary-Input RS Encoder blocks now have the option of inheriting their output data type from their input.
| Version 3.6 (R2007b) Communications Blockset™ Software Release Notes | Version 3.4 (R2006b) Communications Blockset™ Software Release Notes | |
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