Oqpsk input to output mapping

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S_Rajashree on 24 Nov 2021
I have used OQPSK block with samples per symbol as 2, phase offset as zero, input type- bit, symbol mapping- binary, output type -double, pulse shape- half sine and rate option as enforce single rate processing. Unlike QPSK which gives 2 waveforms(real and imaginary), Oqpsk output is 4 waveforms(2 real and 2 imaginary).
I would like to know the reason for getting 2 complex signal instead of 1 at the output of OQPSK block.
I am attaching the block diagram for OQPSK

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