Weaver and Hartley both developed methods of implementing the SSB variety of this technique, which cuts the required bandwidth in half.
One variant of this technique is commonly used in combination with saturating pulse analysis to analyze induction and quenching in photosynthetic systems. Weaver and Hartley both developed methods of implementing the SSB variety of this technique, which cuts the required bandwidth in half. Data that is encoded using this technique can be recovered asynchronously using an envelope detector, but for that to work a positive constant is added to the signal such that the result is always positive. Unlike an alternative technique which varies the phase angle with time, this technique simply multiplies a sinusoidal message by a sinusoidal carrier of fixed frequency. For 10 points, identify this communications technique which was the preferred method of radio transmission before the rise of frequency modulation.
One variant of this technique is commonly used in combination with saturating pulse analysis to analyze induction and quenching in photosynthetic systems.
amplitude modulation