Pilot Directed Continuous Synchronization of OFDM

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

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 System Toolbox; DSP System Toolbox; Signal Processing Toolbox
• MATLAB release: MATLAB 7.5 (R2007b)

[Di Wu]

It is very useful for beginners.

[yang lin]

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

[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'

[Pedro Lobo]

 

[Zhong]

haha，i am the beginner

[wu zhi]

It is very good to me to study OFDM!

[Tang Shuiyi]

 

[Visakh A]

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

[Saravanan Mani]

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

[Baher Mohammed]

great job !

[xiao xiao]

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

[Yella]

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

[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?

[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 [e-mail]

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

[Saravanan Mani]

Hello Shakshi Rana,

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

Thanks,
Saravanan Mani,
Lear Corpration.

[SAMEER fghgf]

Wonderful work!

Does this use pll?

Is pll required in burst ofdm also?