Learn more about Communications Blockset

Version 3.4 (R2006b) Communications Blockset Software

This table summarizes what is new in Version 3.4 (R2006b):

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

• Fixed Point Capability Added to Various Blocks

• Bitwise Soft-Decision Outputs for the PSK and Rectangular QAM Demodulator

• BCH Encoder and Decoder Run Faster and Operate on Shortened BCH Codes

• Fixed-Point MSK Demo

• Binary Error Pattern Generator Block Is Obsoleted

• Version 1.5 Blocks Removed

• Obsolete Blocks

Fixed Point Capability Added to Various Blocks

Fixed point capability is added to the following blocks:

• M-PAM Modulator Baseband

• M-PAM Demodulator Baseband

• Rectangular QAM Modulator Baseband

• General QAM Modulator Baseband

• M-PSK Modulator Baseband

• BPSK Modulator Baseband

• QPSK Modulator Baseband

• OQPSK Modulator Baseband

• Viterbi Decoder

Bitwise Soft-Decision Outputs for the PSK and Rectangular QAM Demodulator

Bitwise soft-decision outputs are enabled for the M-PSK Demodulator Baseband, B-PSK Demodulator Baseband, QPSK Demodulator Baseband, and Rectangular QAM Demodulator Baseband blocks.

BCH Encoder and Decoder Run Faster and Operate on Shortened BCH Codes

BCH Encoder and Decoder blocks run faster and are enhanced to operate on shortened BCH codes.

Fixed-Point MSK Demo

A demo that illustrates the baseband implementation of a fixed-point MSK modulator and demodulator is added. This can be accessed through the demos pane of the Help browser, or by typing commmsk at the command line.

Binary Error Pattern Generator Block Is Obsoleted

The Binary Error Pattern Generator block is obsoleted.

Compatibility Considerations

It now resides in the library cbobsv3, which is obsolete and may be removed in the future.

Version 1.5 Blocks Removed

All the libraries and blocks associated with Communications Blockset version 1.5 have been removed from the product. These libraries are as follows.

• commanabbnd

• commanapbnd

• commblkcod

• commchan

• commcnvcod

• commdigbbnd

• commdigpbnd

• commsink

• commsource

• commsrccod

• commsync

• commutil

Compatibility Considerations

These blocks cannot be used with the current version of the Communications Blockset. The current version of the blockset provides some of the functionality in upgraded blocks.

Obsolete Blocks

The blocks in the following table have been obsoleted since version 3.0.

To access each replacement block, type the library name listed in the Replacement Block Library column at the MATLAB command line.

Obsolete Block	Obsolete Block Library	Replacement Block	Replacement Block Library
Binary Error Pattern Generator	cbobsv3	None	N/A
DSB AM Demodulator Passband	commanapbnd2	DSB AM Demodulator Passband	commanapbnd3
DSB AM Modulator Passband	commanapbnd2	DSB AM Modulator Passband	commanapbnd3
DSBSC AM Demodulator Passband	commanapbnd2	DSBSC AM Demodulator Passband	commanapbnd3
DSBSC AM Modulator Passband	commanapbnd2	DSBSC AM Modulator Passband	commanapbnd3
FM Demodulator Passband	commanapbnd2	FM Demodulator Passband	commanapbnd3
FM Modulator Passband	commanapbnd2	FM Modulator Passband	commanapbnd3
PM Demodulator Passband	commanapbnd2	PM Demodulator Passband	commanapbnd3
PM Modulator Passband	commanapbnd2	PM Modulator Passband	commanapbnd3
SSB AM Demodulator Passband	commanapbnd2	SSB AM Demodulator Passband	commanapbnd3
SSB AM Modulator Passband	commanapbnd2	SSB AM Modulator Passband	commanapbnd3
Rayleigh Fading Channel	commchan2	Multipath Rayleigh Fading Channel	commchan3
Rician Fading Channel	commchan2	Multipath Rician Fading Channel	commchan3
M-PAM Demodulator Baseband	commdigbbndam2	M-PAM Demodulator Baseband	commdigbbndam3
M-PAM Modulator Baseband	commdigbbndam2	M-PAM Modulator Baseband	commdigbbndam3
Rectangular QAM Demodulator Baseband	commdigbbndam2	Rectangular QAM Demodulator Baseband	commdigbbndam3
Rectangular QAM Modulator Baseband	commdigbbndam2	Rectangular QAM Modulator Baseband	commdigbbndam3
General QAM Demodulator Baseband	commdigbbndam2	General QAM Demodulator Baseband	commdigbbndam3
General QAM Modulator Baseband	commdigbbndam2	General QAM Modulator Baseband	commdigbbndam3
BPSK Demodulator Baseband	commdigbbndpm2	BPSK Demodulator Baseband	commdigbbndpm3
BPSK Modulator Baseband	commdigbbndpm2	BPSK Modulator Baseband	commdigbbndpm3
DBPSK Demodulator Baseband	commdigbbndpm2	DBPSK Demodulator Baseband	commdigbbndpm3
DBPSK Modulator Baseband	commdigbbndpm2	DBPSK Modulator Baseband	commdigbbndpm3
DQPSK Demodulator Baseband	commdigbbndpm2	DQPSK Demodulator Baseband	commdigbbndpm3
DQPSK Modulator Baseband	commdigbbndpm2	DQPSK Modulator Baseband	commdigbbndpm3
M-DPSK Demodulator Baseband	commdigbbndpm2	M-DPSK Demodulator Baseband	commdigbbndpm3
M-DPSK Modulator Baseband	commdigbbndpm2	M-DPSK Modulator Baseband	commdigbbndpm3
M-PSK Demodulator Baseband	commdigbbndpm2	M-PSK Demodulator Baseband	commdigbbndpm3
M-PSK Modulator Baseband	commdigbbndpm2	M-PSK Modulator Baseband	commdigbbndpm3
OQPSK Demodulator Baseband	commdigbbndpm2	OQPSK Demodulator Baseband	commdigbbndpm3
OQPSK Demodulator Baseband	commdigbbndpm2	OQPSK Demodulator Baseband	commdigbbndpm3
QPSK Modulator Baseband	commdigbbndpm2	QPSK Modulator Baseband	commdigbbndpm3
QPSK Modulator Baseband	commdigbbndpm2	QPSK Modulator Baseband	commdigbbndpm3

Compatibility Considerations

Although they are currently still shipped with the product, they may be removed in future versions of the Communications Blockset. We recommend that you use the replacement blocks listed in the third column.

Version 3.5 (R2007a) Communications Blockset Software

Version 3.3 (R2006a) Communications Blockset Software

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