System object: comm.OSTBCEncoder
Package: comm

Encode input using orthogonal space-time block code


Y = step(H,X)


Y = step(H,X) encodes the input data, X, using OSTBC encoder object, H. The input is a complex-valued column vector or matrix of data type double, single, or signed fixed-point with power-of-two slope and zero bias. The step method output, Y, is the same data type as the input data. The time domain length, T, of X must be a multiple of the number of symbols in each codeword matrix. Specifically, when you set the NumTransmitAntennas property is 2 or the SymbolRate property is 1/2, T must be a multiple of two and when the SymbolRate property to 3/4, T must be a multiple of three. For a time or spatial domain input of T rows by one column, the encoded output data, Y, is a (T/SymbolRate)-by-NumTransmitAntennas matrix. The input matrix size can be F rows by T columns, where F is the additional dimension (typically the frequency domain) over which the encoding calculation is independent. In this case, the output is an F-by-(T/SymbolRate)-by-NumTransmitAntennas matrix.

    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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