Which modulation scheme is followed by IEEE 802.15.4 standard?
BPSK
QPSK
DSSS
All of these
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Answer is - All of these
IEEE 802.15.4 standard provides low cost and low power consumption for devices which require battery life. It supports the implementation of mesh networks.
BPSK or binary phase shift keying is a two phase modulation scheme. QPSK or quadrature phase shift keying uses four phases. DSSS or direct sequence spread spectrum refers to a spread spectrum modulation techniques which is used to reduce overall signal interference.
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