Communications Toolbox™ 4.1

Latest Features

Version 4.1

Released: 01 Mar 2008
 

Version 4.1, part of Release 2008a, includes the following enhancements:

• Eye diagram measurements can now be generated from the histogram data of eye diagram objects
• New EyeScope tool shows both the eye diagram figure and measurement results in a unified, graphical user environment
• New CRC generator and detector objects
• The bchdec, bchenc, rsdec, and rsenc functions have been upgraded to objects that can now perform erasure decoding
• New demo for MIMO systems using spatial multiplexing

See the Release Notes for details.

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Version 4.0

Released: 01 Sep 2007
 

Version 4.0, part of Release 2007b, includes the following enhancements:

• New bi-Gaussian Doppler and asymmetrical Jakes Doppler spectra objects
• Enhanced channel objects and channel visualization tool, supporting different Doppler spectra per path
• Enhanced ricianchan object, supporting different Rician parameters on all paths
• New demos modeling COST 207/GSM/EDGE and HF channels
• New eye diagram object using color to convey how often a trace traverses a point
• New PAM, OQPSK, DPSK, MSK, and General QAM modem objects
• Theoretical BERs added to BERTool and bercoding function for hard-decision and soft-decision decoding with awgn function

See the Release Notes for details.

Version 3.5

Released: 01 Mar 2007
 

Version 3.5, part of Release 2007a, includes the following enhancements:

• Support for different Doppler spectra to channel objects
• Theoretical BER results added to BERTool
• New demo showcasing MIMO capability
• New PN sequence generator object
• New dvbs2ldpc function that returns the parity-check matrix of an LDPC code used in the DVB-S.2 standard
• New functions for estimating delays between signals (finddelay) and aligning two signals (alignsignals)
• Enhanced speed of rsdec and bchdec functions
• Theoretical results refined for berawgn, berfading, and BERTool

See the Release Notes for details.

Version 3.4

Released: 01 Sep 2006
 
Version 3.4 part of Release 2006b, includes the following enhancements:

• Bitwise soft-decision outputs enabled for PSK and QAM demodulators
• New LDPC encoder and decoder functions
• Line of sight Doppler Shift property added to the Rician channel
• Theoretical BER results for Hamming, Golay, and Reed Solomon codes available from the command line

See the Release Notes for details.

Version 3.3

Released: 01 Mar 2006
 

Version 3.3, part of Release 2006a, includes minor enhancements. See the Release Notes for details.

Version 3.2

Released: 01 Sep 2005
 

Version 3.2, part of Release 14 with Service Pack 3, includes minor enhancements. See the Release Notes for details.

Version 3.1

Released: 07 Mar 2005
 

• New channel visualization tool to visualize and explore time-varying communications channels
• Added new Gray coding mapping functions and Gray coding enhancements in the existing modulator and demodulator functions
• Speed improvement in some GF functions and in the Rayleigh fading channel function
• Added theoretical BER results for coded BPSK signal in a Rician channel

Version 3.1, part of MathWorks Release 14 with Service Pack 2, also includes other minor enhancements. See the Release Notes for details.

Version 3.0.1

Released: 22 Sep 2004
 

Version 3.0.1 includes the latest bug fixes.

Version 3

Released: 02 Jun 2004
 

New features include:

• New channel models, including binary symmetric and Rayleigh and Rician multipath fading channel
• Equalizer algorithms, including LMS, RLS, CMA for both linear and DFE, and MLSE
• New performance evaluation functions to compute the error probability for different coded and uncoded channels
• Block and convolutional interleavers and deinterleavers
• Enhanced and easier-to-use modulator and demodulators, as well as BCH encoder and decoder
• New Huffman coding and decoding functions for source coding
• BERTool GUI for comparing the bit error rate of your system with a wide variety of proven analytical results