| Communications Toolbox | |
Quadrature amplitude modulation
y = qammod(x,M)
y = qammod(x,M,ini_phase)
y = qammod(x,M,ini_phase,symbol_order)
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, then 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 will use a natural binary-coded ordering. If symbol_order is set to 'gray', it will use a Gray constellation ordering.
Examples using this function are in Computing the Symbol Error Rate and Examples of Signal Constellation Plots.
qamdemod, genqammod, genqamdemod, pammod, pamdemod, modnorm, Modulation
| | qamdemod | qfunc | |
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