Function Reference: pskdemod

Function File: y = pamdemod (x, m) ¶

Function File: y = pamdemod (x, m, phi) ¶

Function File: y = pamdemod (x, m, phi, type) ¶

Demodulates a complex-baseband phase shift keying modulated signal into an information sequence of integers in the range [0 … M-1]. phi controls the initial phase and type controls the constellation mapping. If type is set to "Bin" will result in binary encoding, in contrast, if set to "Gray" will give Gray encoding. An example of Gray-encoded 8-PSK is

d = randint (1, 1e3, 8);
y = pskmod (d, 8, 0, "gray");
z = awgn (y, 20);
d_est = pskdemod (z, 8, 0, "gray");
plot (z, "rx")
biterr (d, d_est)

See also: pskmod.

Package: communications

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