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Time Frequency Toolbox >> Time Frequency Toolbox > Choice of Particular Signals > anaqpsk

anaqpsk

Quaternary Phase Shift Keying (QPSK) signal.

Calling Sequence

[Y,PM]=anaqpsk(N)
[Y,PM]=anaqpsk(N,NCOMP)
[Y,PM]=anaqpsk(N,NCOMP,F0)

Parameters

N :

number of points

NCOMP :

number of points of each component (default: N/5)

F0 :

normalized frequency. (default: 0.25)

Y :

signal

PM0 :

initial phase of each component (optional).

Description

anaqpsk returns a complex phase modulated signal of normalized frequency F0, whose phase changes every NCOMP point according to a discrete uniform law, between the values (0, pi/2, pi, 3*pi/2). Such signal is only 'quasi'-analytic.

Examples

[signal,pm0]=anaqpsk(512,64,0.05);
clf; subplot(211); plot(real(signal)); subplot(212); plot(pm0);

See also

Authors

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