Communications Toolbox 4.1
Latest Features
Version 4.1
Released: 01 Mar 2008Version 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 2007Version 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 2007Version 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
dvbs2ldpcfunction 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
rsdecandbchdecfunctions - Theoretical results refined for
berawgn,berfading, andBERTool
See the Release Notes for details.
Version 3.4
Released: 01 Sep 2006Version 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 2006Version 3.3, part of Release 2006a, includes minor enhancements. See the Release Notes for details.
Version 3.2
Released: 01 Sep 2005Version 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 2004Version 3.0.1 includes the latest bug fixes.
Version 3
Released: 02 Jun 2004New 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
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