Igital communication schemes + AWGN channel

The research paper should include the following:

Digital modulation schemes in general (Just introduction)

Quadrature Phase Shift Key Modulation (QPSK) (in detail)

Quadrature Amplitude Modulation (QAM) (in detail)

Orthogonal frequency-division multiplexing (OFDM) (in detail)

AWGN channel (in detail)

WITH AID of digrams and mathmatical equations (all these kind of things)