Efficient Data Recovery Scheme in PTS-Based OFDM Systems with MATRIX Formulation
Partial Transmit Sequence (PTS) scheme is one of the Peak-to-Average Power Ratio (PAPR) reduction techniques in OFDM systems. In the PTS scheme, in order to generate signals with low PAPR, one OFDM symbol is partitioned into disjointed sub-blocks, and each sub-block is multiplied by a phase factor. For data recovery, receivers must have Side Information (SI), e.g. phase factors, from transmitters. In the proposed method, the data recovery process in PTS-based OFDM systems is performed without SI. An additional pilot symbol is intentionally inserted at the end of each sub-block, so that efficient data decoding based on channel estimation can be executed with known pilot symbols.