From Dedicated Redundant Subcarriers to Distributed Redundancy in UW-OFDM
Sprache des Vortragstitels:
Asilomar Conference on Signals, Systems and Computers
Sprache des Tagungstitel:
Unique word (UW)-OFDM is based on introducing redundancy, either on dedicated redundant subcarriers leading to systematically encoded UW-OFDM, or spread over the entire bandwidth, resulting in the significantly better performing non-systematically encoded UW-OFDM concept. The waveform design of the latter has originally been optimized by incorporating transmitter as well as receiver processing steps, while the optimization of the systematic approach primarily focuses on the mean redundant energy minimization of the transmit symbols. This work closes the gap between both by introducing a design procedure for non-systematically encoded UW-OFDM that is also solely predicated on redundant energy arguments. Furthermore, the presented approach provides a means to increase the bandwidth efficiency by relaxing the UW constraint.