5.0 | 3 ratings Rate this file 121 downloads (last 30 days) File Size: 287.09 KB File ID: #18932

Pilot Directed Continuous Synchronization of OFDM

26 Feb 2008 (Updated 08 Jan 2010)

Code covered by the BSD License

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

File Information
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	The author wishes to acknowledge the following in the creation of this submission: Carrier & Symbol Timing Recovery
Required Products	Communications Blockset Communications Toolbox Signal Processing Blockset Signal Processing Toolbox
MATLAB release	MATLAB 7.5 (R2007b)
Zip File Content
Other Files	license.txt, line_fit.mdl, ofdm_1.gif, ofdm_13.mdl, ofdm_example_tips.pdf

Tags for This File
Everyone's Tags	carr(3), carrier recovery(4), cyclic prefix(2), ofdm(5), pilot(2), sync(2), synchronization(2), synchronize(2), timing recovery(2), wireless(2)
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Comments and Ratings (6)
12 Oct 2008	Di Wu	It is very useful for beginners.
31 Dec 2008	yang lin	MATLAB 7.5 (R2007b) ,I do not have this Version, where can I have the License
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'
03 Apr 2009	Pedro Lobo
05 May 2009	Zhong	haha，i am the beginner
29 Oct 2009	wu zhi	It is very good to me to study OFDM!

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Updates
01 Mar 2008	Minor update of a scope display format and changes to keywords/ summary.
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