In various wireless communication systems, Orthogonal Frequency Division Multiplexing (OFDM) has been adopted as a standard method as it can achieve high rate transmission of data and ensure high reliability over the multi-path fading environment. To minimize the peak-to-average power ratio of OFDM signals, two partials transmit sequence (PTS) schemes without side information (SI) are proposed in the paper. The proposed methods may not transmit SI to identify a rotating vector, as recognizable phase offset is implemented to each rotating vector element. The maximum - likelihood detector (ML) is being used to retrieve SI from the transmitted signal and to restore the data sequence. The Euclidean distance between the specified signal constellation and the signal constellation rotated by the offset phase is exploited by this ML detector. Through doing a pairwise error (PEP) analysis, the selection of appropriate phase offsets for SI embedding is investigated. Research on two approaches in the suggested method first involves a scrambling base, and scrambling base optimization as its second method. In this article, works with QAM and QPSK modulation is done based on natural AWGN noise.
Volume 12 | Issue 7
Pages: 325-336
DOI: 10.5373/JARDCS/V12I7/20202014