BLOCK WINDOWED BURST ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TRANSMISSION METHOD WITH WINDOW OVERLAPPING AND TIME-INTERLEAVING
Instituto de Telecomunicações, Universidade de Coimbra, Universidade Nova de Lisboa
Patent Nr.: PT115602
Regional Coverage: National
Grant Status: Pending
Filling Date: 26-06-2019
Granting Date: N/A
Disclosed herein is a method and transceiver apparatus of an OFDM-based multicarrier technique that packs together multiple windowed OFDM blocks with a single zero-pad to deal with the multipath propagation delay of the channel. Windowing assures a compact spectrum of OFDM-based blocks. To keep transmission rate and spectrum occupancy windowed OFDM blocks are partial overlapped at time domain. To improve robustness against time dispersive channels time-interleaving of samples of the packed and overlapped-OFDM-based blocks is employed. Different embodiments of non-iterative and iterative receivers to cancel both channel impairments (at frequency domain) and interference resulting from the overlapping operation (at time domain) are disclosed.
Disclosed techniques allow for spectral efficiency improvement leveraged by windowing and block overlapping, power efficiency improvement resulting from the use of a single zero-padding block per multiple OFDM-based blocks and transmission resilience against time dispersive effects.