Constructions Of Near Complementary Sequences

In multicarrier communication,orthogonal frequency division multiplexing(OFDM)technology has been widely applied to wire and wireless communication sys-tem,their popularity is mainly due to high spectral efficiency utilization and the robust-ness against anti multipath fading channels.In the process of transmission,the PMEPR of the OFDM signal can affect the performance of the whole system.Therefore,the design for sequences as OFDM signals with low PMEPR has important significance.At present,constructing codes with the feature of Golay complementary sequences,is an ideal method to reduce the PMEPR.Based on the work of Yu and Gong,utiliz?ing different types of seed pairs and control pairs,we construct sereral classes of near complementary sequences with new parameters.Furthermore,the upper bound of peak envelope power ratio of new sequences are given.