Syllabus

Review of wireless channel characteristics – Multi carrier and OFDM system fundamentals – OFDMsystemmodel-Comparisonwithsinglecarrier-ChannelcapacityandOFDM–FFTimplementation– Power spectrum – Impairments of wireless channels to OFDM signals – Comparison with other multicarrier modulation scheme: MCCDMA. Synchronization in OFDM–Timing and Frequency Offset in OFDM, Synchronization & system architecture, Timing and Frequency Offset estimation–Pilot and Non pilot based methods, Joint Time & Frequency Offset estimation. Channel Estimation in OFDM systems – Differential and Coherent detection; Pilot symbol aide destination - Block type and Comb type pilot arrangement; Decision directed channel estimation –MMS Estimation using time and frequency domain correlation Clipping in Multicarrier systems–Power amplifier non linearity–Error probability analysis–Performance in AWGN – PAPR properties of OFDM signals – PAPR reduction techniques with signal distortion; Techniques for distortion less PAPR reduction – Selective mapping, Clipping and Filtering, Partial Transmit Sequence, DFT Spreading and Optimization techniques.

OFDM-Index Modulation, Generalized frequency division multiplexing (GFDM), filter bank multi-carriers (FBMC) and universal filtered multi-carrier (UFMC), Orthogonal Time Frequency Space modulation (OTFS), Multiple Accesses Techniques–orthogonal frequency division multiple accesses (OFDMA), generalized frequency division multiple accesses (GFDMA), non-orthogonal multiple accesses (NOMA).