LoRa is a form of “chirp spread spectrum” modulation. The “chirp” signal sweeps smoothly across specific frequency range: usually 125 kHz, 250 kHz or 500 kHz wide. How long the sweep takes ...

A simple tweak to the usual setup is all that is needed to enhance a spectroscopy technique that uses waves in the terahertz ...

fixed-width square wave pulse at a set point in the received FM signal’s waveform, usually at the zero-crossing point. Since the frequency of the modulated carrier changes, the duty cycle of the ...

For example, in AM radio, the voltage (amplitude) of a carrier with a fixed center frequency (the station's channel) is varied (modulated) by the analog audio signal.

QAM Modulator and Demodulator combine two amplitude modulation signals into a single data transfer channel: 1. Technique of modifying any one characteristic (amplitude, frequency, or phase) of a ...

A scientific CMOS (sCMOS) camera captures the modulated fluorescence signals, which are processed using Hessian SIM and sparse deconvolution algorithms to generate high-resolution chemical and ...

The new modulator can be used with any frequency from 10 megahertz to 1.14 terahertz. "We cover the entire frequency range ...

The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM ...

If we consider the time at which a signal passes through a threshold, we can see that modulation in the time and voltage domains can be considered equivalent. Figure 1 shows us the translation, adding ...