Sir,

Q1. I want to give complex input to QPSK ,what is the command used in MATLAB.

Q2.given data is 20 symbols but it is dividing into even and odd parts, what is the QPSK signal having 20 symbols are not?)

Complex numbers are represented as X+Yi in matlab. Example: C = 1 +2i where i is the imaginary part

Yes, Final QPSK signal has 20 symbols.

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