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step

System object: comm.GardnerTimingSynchronizer
Package: comm

Recover symbol timing phase using Gardner's method

Syntax

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

Description

[Y,PHASE] = step(H,X) recovers the timing phase 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. The length of X is N*K, where N is an integer greater than or equal to two and K is the number of symbols. The output, Y, is the signal value for each symbol, which you use to make symbol decisions. Y is a column vector of length K with the same data type as X.

[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 logical or double scalar. This syntax applies when you set the ResetInputPort property to true.

    Note:   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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