The modulation scheme followed by Z-wave is: a. BPSK b. QPSK c. GFSK d. O-QSK
Answers
The correct answer is option C.
GSFK modulation scheme is followed by a Z-wave.
It is a vital parameter for Z wave RF interface.
GSFK Manchester channel encoding scheme helps in the modulation of wireless signals by Z-WAVE.
Z wave is wireless communication technology used for home automation purposes like smart locks, lighting control etc.
Frequency Shift Keying: The process of varying the frequency in accordance to the carrier wave is referred to as Frequency Shift Keying.
Gaussian Frequency Shift Keying: The process of changing symbols periodically at every intervals is referred to as Gaussian frequency-shift keying.
It contains a gaussian filter to smoothen the wave and to reduce the sideband power along with the interference.
GFSK is used in,
- DECT
- Bluetooth
- Cypress WirelessUSB
Reason: Presence of the gaussian filter to make the transitions smoother and to limit its spectral width.
Hence, The modulation scheme followed by Z-wave is GFSK.
The answer is (c) GFSK