System object: comm.EarlyLateGateTimingSynchronizer
Package: comm

Recover symbol timing phase using early-late gate method


[Y,PHASE] = step(H,X)
[Y,PHASE] = step(H,X,R)


[Y,PHASE] = step(H,X) performs timing phase recovery and returns the time-synchronized signal, Y, and the estimated timing phase, PHASE, for input signal X. The input X must be a double or single precision complex column vector. Ideally, it is when the timing phase estimate is zero and the input signal has symmetric Nyquist pulses. In this case, the timing error detector for the early-late gate method requires samples that span one symbol interval.

[Y,PHASE] = step(H,X,R) restarts the timing phase recovery process when you input a reset signal, R, that is non-zero. R must be a double precision or logical scalar. This syntax applies when you set the ResetInputPort property to true.

    Note:   H specifies the System object™ on which to run this step method.

    The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties and input specifications, such as dimensions, complexity, and data type of the input data. If you change a nontunable property or an input specification, the System object issues an error. To change nontunable properties or inputs, you must first call the release method to unlock the object.

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