Carrier & Symbol Timing Recovery

This model implements a contemporary symbol timing recovery scheme.

Description

Timing recovery is a critical aspect of Digital Communications Receivers. This model uses a fractional sample delay implemented with a Farrow filter to create a symbol rate timing recovery subsystem. This is combined with a decision aided Carrier Recovery PLL. For testing, a transmitter with continuosly variable carrier frequency error and symbol rate error is included. Two versions of the transmitter are provided. One version uses Simulink's variable step solver to create a continuous time signal for re-sampling by the receiver. The other version uses the same fractional sample delay as in the receiver to implement the transmitter in discrete time. References are included in the model.

• Acknowledgements: This submission has inspired the following:; Pilot Directed Continuous Synchronization of OFDM
• Required Products: Communications Blockset; Communications Toolbox; Signal Processing Toolbox; Signal Processing Blockset; Simulink
• MATLAB release: MATLAB 7.5 (R2007b)
• Other Files: timing_recovery_1.mdl, ; timing_recovery_2Q.mdl

[Sander Stepanov]

looks good, but I can not run it, the error is
Failed to find 'Direct-Form II Transpose Filter' in library 'dspobslib' referenced by 'timing_recovery_1/Timing Error Detector + Loop Filter. Requires 4 samples per symbol. /Timing Error Detector/Loop Filter /Direct-Form II Transpose Filter2'

[Sander Stepanov]

now it is good
only what is about fading and AGC joint working with synchronization, if it is added, it will be real channel simulation

[saifudeen a r]

 

[student telecom]

Can I get it for matlab R13 please. Need it to see wether it is better then my approch or the same

[viswanath pothuraju]

 

[Philip Secker]

Well done, this is a tricky subject but is an integral part of modern modems.

[mohamad razavy]

 

[afshin sh]

 

[Wongi Seo]