Learn more about Communications Blockset

Version 4.3 (R2009b) Communications Blockset Software

This table summarizes what is new in Version 4.3 (R2009b):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems	Related Documentation at Web Site
Yes Details below	No	Bug Reports Includes fixes	Printable Release Notes: PDF Current product documentation

New features and changes introduced in this version are

• Error Vector Magnitude (EVM) Measurement Block

• Modulation Error Ratio (MER) Measurement Block

• Enumerated Data Type Support

• New Demos

Error Vector Magnitude (EVM) Measurement Block

Error Vector Magnitude (EVM) provides a measurement of modulator or demodulator performance in the presence of impairments. Essentially, EVM is the vector difference at a given time between the ideal (transmitted) signal and the measured (received) signal. The EVM Measurement block contains a normalization option that calculates RMS EVM based on the specific requirements of different industry standards. You select which normalization method the block uses to perform EVM calculations. The block can normalize to the average reference signal power, average constellation power, or peak constellation power.

EVM measurements can help identify sources of signal degradation, such as: phase noise, I-Q imbalance, amplitude nonlinearity, and filter distortion. You can also use EVM measurements to determine system performance in communications applications. For example, determining if an EDGE system conforms to the 3GPP radio transmission standards requires measuring accurate RMS EVM, Peak EVM, and 95th percentile values.

For more information, see the EVM Measurement help page.

Modulation Error Ratio (MER) Measurement Block

Modulation Error Ratio (MER) is a measurement of the signal-to-noise ratio (SNR) in digital modulation applications. You can use this measurement to determine system performance in communications applications. The block measures MER in decibels (dB). For consistency, the unit of measure for Minimum MER and Percentile MER measurements also appear in decibels.

For more information, see the MER Measurement help page.

Enumerated Data Type Support

Limited support for enumerated data types is now available. The following blocks support enumerated data types as of this release:

• Algebraic Deinterleaver

• Algebraic Interleaver

• Deinterlacer

• Find Delay

• General Block Deinterleaver

• General Block Interleaver

• Matrix Deinterleaver

• Matrix Interleaver

• Insert Zero

• Interlacer

• Matrix Helical Scan Deinterleaver

• Matrix Helical Scan Interleaver

• Puncture

• Random Deinterleaver

• Random Interleaver

See Using Enumerated Data in the Simulink documentation for more information about enumerated data types.

New Demos

The following demo is new in this release.

• Defense Communications: US MIL-STD-188-110A Receiver

Version 4.4 (R2010a) Communications Blockset Software

Version 4.2 (R2009a) Communications Blockset Software

© 1984-2010- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS