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Ultrasonic wire bonding is one of the main methods in the package of the chip and substrate of the chip. The vibrations of transducer were tested. Surrogate-data method of phase-randomized based on correlation dimension is proposed to identify the nonlinear chaos of data obtained by ultrasonic wire bonding system. The result indicate there is nonlinear factor in the axial direction of the amplitude...
MIMO is a main technique of improving system capacity in wireless communication, but its application is limited by spatial correlation and requirement of traditional VBLAST system about the amount of transmitting and receiving antennas. This paper presents an adaptive MIMO transmission technique. Adopting uniform channel decomposition (UCD), STBC and antenna grouping, the proposed MIMO scheme can...
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