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The Constructions of Mismatched Filtering of Periodic Quadriphase Sequences with Even Length
Xiuping PENG Chengqian XU Jiadong REN Kai LIU
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/09/01
Online ISSN: 1745-1337
Type of Manuscript: LETTER
Category: Coding Theory
quadriphase sequences, cross-correlation sequences, mismatched filtering,
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Quadriphase sequences with good correlation properties are required in higher order digital modulation schemes, e.g., for timing measurements, channel estimation or synchronization. In this letter, based on interleaving technique and pairs of mismatched binary sequences with perfect cross-correlation function (PCCF), two new methods for constructing quadriphase sequences with mismatched filtering which exist for even length N ≡ 2(mod4) are presented. The resultant perfect mismatched quadriphase sequences have high energy efficiencies. Compared with the existing methods, the new methods have flexible parameters and can give cyclically distinct perfect mismatched quadriphase sequences.