Tadasuke Inoue

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Generation of random bit sequences with good statistical properties is proposed, where a simple post-processing by shift registers and modulo-2 addition is employed. The proposed method is based on modulo-2 addition of periodic and aperiodic binary sequences, where it is necessary to generate a balanced aperiodic binary sequence before modulo-2 adding to a(More)
We present a new criterion for selecting initial phases of maximal-period sequences which are kinds of chaos-based spreading sequences. The sequences with the phase obtained by such a criterion have advantages in asynchronous DS-CDMA with respect to deviations of cochannel interference parameters from their average value. We can select a large class of(More)
It is well known that median filters are very useful for image restoration. The success of median filters is based on two properties: edge preservation and efficient impulsive noise attenuation. However, the median filter is not a perfect filtering operation. It may remove important image details and not sufficiently attenuate non-impulsive noise. The main(More)
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