Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
Infrared thermal sensors are used in a wide variety of application which require room temperature operation and uniform sensitivity over a wide modulation frequency range.
热型红外传感器应用广泛，它要求在室温条件下工作，在宽的调制频率范围内具有均匀的灵敏度。
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The optimum receiver performance of a hybrid pulse phase and position modulation(PAPM) over ultra-wideband(UWB) indoor fading channel model is analyzed.