Its frequency division multiple access (FDMA) method divides the assigned spectrum into 6.25-kHz or 12.5-kHz channels. Phase I of the P25 project uses a four-symbol FSK (4FSK) modulation.

FSK uses more bandwidth ... 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 ...

It highlights how embedded resources can be used to implement an all-digital FSK / PSK modulator, which modulates serial data transmission of a UART (Universal Asynchronous Receiver and Transmitter).

In RFID work, power-efficient modulations like frequency-shift keying (FSK) are often used ... like the RTSA or VSA with spectrum, time-domain, modulation-domain, code-domain, and spectrogram ...

Amiccom released 2.4GHz direct-sequence spread-spectrum wireless chip in June 2020, named A7157, which supports FSK and DSSS modulation operation modes. In FSK mode, A7157 is a high-speed (4Mbps ...