Question

Which modulation scheme is followed by IEEE 802.15.4 standard?
1.BPSK 2.QPSK 3.DSSS 4.All of these

Answer 1

ANSWER
............

QPSK scheme is followed by IEEE 802.15.4 standard

Answer 2

Answer


4.All of these

Proof:

Uses direct sequence spread spectrum (DSSS) modulation.
Highly tolerant of noise and interference and offers link
reliability improvement mechanisms.
Low‐speed versions use Binary Phase Shift Keying (BPSK).
High data‐rate versions use offset‐quadrature phase‐shift
keying (O‐QPSK).