Patents Assigned to Daiei Electronics Co., Ltd.
  • Adaptive interference-free spread-spectrum system employing binary code sequence sets with zero correlation zone properties
    Patent number: 6963600
    Abstract: A direct sequence spread spectrum system consisting of modulator and demodulator wherein the spreading sequence with zero correlation zone properties, and the despreading consists of multiplying the received signal with the same spreading sequence, followed by a low pass filter, decoder and deinterleaver. The bit rate of the spreading sequence for each user is normally much higher than the input encoded data bit rate, and therefore it spreads the system spectrum.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: November 8, 2005
    Assignees: Toyo Communication Equipment Co., Ltd., Daiei Electronics Co., Ltd.
    Inventors: Pingzhi Fan, Naoki Suehiro, Noriyoshi Kuroyanagi