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A Synchronized Mil-Std-188-110B Receiver

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A Synchronized Mil-Std-188-110B Receiver

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12 Nov 2008 (Updated )

Extends the shipping "188" modem. Features a synchronized 1200 bps / short interleave receiver.

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File Information
Description

This file set includes a top level unsychronized Tx / Rx model and a more detailed synchronized Rx model. The top level model Tx outptut has been tested with a third party reference mil-std-188-110 modem and found to generates compliant waveforms. A variable symbol rate Tx driving the synchronized Rx model was added on 11/21/08.

The Rx model implements the 1200 bps / short (0.6 sec) interleave mode. It is driven by recorded wave files that have varying degrees of timing and carrier errors to test the tracking loops.

The model includes:
1) selectable channel impairments
2) preamble correlation to initiate downstream processing
3) a 20 forward-20 feedback tap Recursive Decision Feedback Equalizer
3) timing recovery loop to track long term clock rate errors
4) carrier recvoery loop to ease the burdon of the equalizer
5) novel timing and phase error detectors
6) received data converted to scrolling text output

Acknowledgements

Defense Communications: Us Mil Std 188 110 B Waveform Simulation inspired this file.

Required Products Communications System Toolbox
DSP System Toolbox
Signal Processing Toolbox
Simulink
Stateflow
MATLAB
MATLAB release MATLAB 7.9 (R2009b)
Other requirements Windows audio support.
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Comments and Ratings (3)
21 Apr 2011 Ben

This model is very useful. Could the author or someone else give a detailed discussion about the timing and carrier recovery algorithm used in this model?

24 Aug 2010 Tanyer Alan  
19 Oct 2009 sandeep mane

quite useful. Thanks.

Updates
12 Nov 2008

Changed Ml release info from 2006B to 2007B.

21 Nov 2008

Added a variable symbol rate transmitter model.

17 Dec 2008

Minor adjustment of signal level to calibrate SNR.
Subsystem name change to fix GUI bug.

08 Jan 2010

Updated for R2009B.

09 Feb 2010

removed MEX file

24 May 2011

Modified to work in R2009B though R2011a inclusive.

12 Dec 2011

Modified to work with versions R2009B through R2012A (pre-release).

26 Sep 2013

The models have been modified to be in compliance with changes made to R2013B.

26 Sep 2013

Models updated to be compliant with changes in R2013B.

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