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Multidimensional modulation (MD modulation) is modifying or multiplying an MD signal (typically sinusoidal and referred to as the carrier signal) with another signal that carries some information or message. In the frequency domain, the signal is moved from one frequency index to another. if X (\omega_1,...,\omega_M)|}} then X (\omega_1 - \theta_1,...,\omega_M - \theta_M)|}} Typically the carrier signal is a sinusoidal signal and in various application, a real signal as such (with no imaginary component). The figures below illustrate a quick example of a 2-D modulation. The original signal from () is modulated with a sinusoidal signal to get (). The equations () and () are the real and the imaginary components of the modulated signal. ==Background/Motivation== The MD modulation is one of the properties of the Fourier Transform in the MD sense. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Multidimensional modulation」の詳細全文を読む スポンサード リンク
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