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Perfect sequences have wide application fields, including spread spectrum communication, synchronization techniques, channel estimation, and cell search. In this letter, two kinds of (almost) perfect Gaussian integer sequences of length $N\!=\!2 ({\bmod} 4)$ and $N\!=\!0 ({\bmod} 4)$ are proposed and constructed by complex transformations and interleaving techniques, using the perfect Gaussian integer...
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