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Pilot Directed Continuous Synchronization of OFDM

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26 Feb 2008 (Updated )

Model of a generic OFDM system with closed loop control of carrier and timing recovery.

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Description

This model implements a generic OFDM TX and RX, which is not tied to any particular industry standard. The objective of this model is to develop and explore a continuous (not “bursty”) carrier and timing tracking synchronization scheme. The techniques incorporated can then be extended and modified to suite specific communications standards. The model uses an “acquisition” technique that exploits the correlation properties of the cyclic prefix to get a rough estimate of the frame boundary before attempting to accomplish the fine tracking algorithms. The model implements a 64 carrier OFDM waveform with a 16 point cyclic prefix. The OFDM symbol has 16 pilots, 3 guard tones (0 amplitude at band edge) and uses 4 QAM for the 45 remaining data streams.

This latest model includes a fading channel, BER computation, and improved control loop dynamics.

Acknowledgements

Carrier & Symbol Timing Recovery For N Qam inspired this file.

Required Products Communications Blockset
Communications System Toolbox
DSP System Toolbox
Signal Processing Toolbox
MATLAB release MATLAB 8.2 (R2013b)
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Comments and Ratings (25)
04 Aug 2014 Marc Denis

An excellent model to teach OFDM.
I am puzzled, however, about "Homer's Rule" ???? I can't find a reference for this. Can you point to some reference material for Homer's Rule?

Thanks
Marc Denis

23 Mar 2014 Binjal SHAH

Can anyone tell me which parameter or block I have to change for its BER Calculation? my mail id is bnshah88@gmail.com

21 Nov 2013 antonynycil  
30 Apr 2013 kishore  
30 Apr 2013 kishore

Can any one provide information regarding operation of linear fit in phase calculation with respect to simulink blocks

27 Mar 2013 kishore

hello ,
can anyone provide me a full report or explanation text on this model
mail id:kishorebg025@gmail.com

27 Mar 2013 kishore

hello ,
can anyone provide me a full report or explanation text on this model
mail id:kishorebg025@gmail.com

27 Mar 2013 kishore

hello ,
can anyone provide me a full report or explanation text on this model
mail id:kishorebg025@gmail.com

14 May 2012 Karthik

Very helpful for beginners . Thanks a lot for uploading .

19 Oct 2011 SAMEER fghgf

Wonderful work!

Does this use pll?

Is pll required in burst ofdm also?

08 Sep 2011 Saravanan Mani

Hello Shakshi Rana,

I will check my place and I will let you know.

Thanks,
Saravanan Mani,
Lear Corpration.

07 Sep 2011 Shakshi rana

Hello sir!
I am working on this topic for past few months but was having a problem with the code. I find these files to be very helpful for my thesis.But these files are not opening in my MATLAB Software. there is an error named:
Error in ==> open at 141
feval(openAction,fullpath);

My MATLAB Version is:
Configuration:
MATLAB Version: 7.0.1.24704 (R14) Service Pack 1
MATLAB License: 216319
Operating System: Microsoft Windows XP
Window System: Version 5.1 (Build 2600: Service Pack 3)
Processor ID: x86 Family 6 Model 15 Stepping 13, GenuineIntel
Virtual Machine: Java 1.4.2_04 with Sun

Kindly help me out, is this a software problem or problem in the code???
Please reply me asap on sakshi_rana@strobotix.com

I will be very thankful to you.
Regards,
Shakshi Rana
Student-Electronics Engineering

08 Jun 2011 Yella

I have coded channel sychronization in OFDM channels in MATLAB using Schmidl Cox algorithm....Can you suggest me how to omplement the same in Simulink?

08 Jun 2011 Yella

I loved it and was in pursuit of it...

27 Dec 2010 xiao xiao

I need it very much~But why I can't open it?

12 Dec 2010 Baher Mohammed

great job !

08 Oct 2010 Saravanan Mani

Very Nice...I read your thesis... weldon .. very superr...

07 Oct 2010 Visakh A

Wonderful... just what a beginner like me needed... Thanks a lot

05 Sep 2010 Tang Shuiyi  
29 Oct 2009 wu zhi

It is very good to me to study OFDM!

05 May 2009 Zhong

haha,i am the beginner

03 Apr 2009 Pedro Lobo  
01 Jan 2009 yang lin

I can not open it .why?
due to the presence of characters that are not supported in the current
character encoding setting 'GBK'

31 Dec 2008 yang lin

MATLAB 7.5 (R2007b) ,I do not have this Version, where can I have the License

12 Oct 2008 Di Wu

It is very useful for beginners.

Updates
03 Dec 2008

This latest model includes a fading channel, BER computation, and improved control loop dynamics.

16 Apr 2009

More tuning of phase slope and offset estimators for improved signal acquisition.

08 Jan 2010

Updated to run with R2009B.

08 Jan 2010

Updated to run with R2009B

08 Jan 2010

Edited to run in R2009B.

08 Jan 2010

Updated for R2009B

26 Sep 2013

The model has been modified for compliance with changes in R2013B.

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