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EXPLAIN a) what the main advantages of MPSK (BPSK, QPSK, . . .) over other digital...

EXPLAIN

a) what the main advantages of MPSK (BPSK, QPSK, . . .) over other digital communication systems are,

b) what the difference(s) between bitrate and symbol rate is(are) and what the ratio between them for an 8-PSK is.

c) what a “constellation diagram” refers to

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