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| R2012a Documentation → Communications System Toolbox | |
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y = qammod(x,M)
y = qammod(x,M,ini_phase)
y = qammod(x,M,ini_phase,symbol_order)
Warning This function is obsolete and may be removed in the future. We strongly recommend that you use the comm.GeneralQAMModulator System object instead. |
y = qammod(x,M) outputs the complex envelope y of the modulation of the message signal x using quadrature amplitude modulation. M is the alphabet size and must be an integer power of 2. The message signal must consist of integers between 0 and M-1. The signal constellation is rectangular or cross-shaped, and the nearest pair of points in the constellation is separated by 2. If x is a matrix with multiple rows, the function processes the columns independently.
y = qammod(x,M,ini_phase) specifies the initial phase of the modulated signal in radians.
y = qammod(x,M,ini_phase,symbol_order) specifies how the function assigns binary words to corresponding integers. If symbol_order is set to 'bin' (default), the function uses a natural binary-coded ordering. If symbol_order is set to 'gray', it uses a Gray constellation ordering.
Examples using this function are in Compute the Symbol Error Rate and Examples of Signal Constellation Plots.
genqamdemod | genqammod | modnorm | pamdemod | pammod | qamdemod
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