Patents by Inventor Chanming Zhou

Chanming Zhou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Complex despreading system
    Patent number: 6252899
    Abstract: A compact and easily-assembled circuit for a complex despreading system, arranged such that the circuit does not contain pairs of adders at the output area. The configuration of the circuit enables the addition and subtraction of different signal components to occur before the multiplication stage and not at a pair of adders located at the output area The complex despreader system employs a complex matched filter at a receiver for despreading received signals with a QPSK system in the primary modulation and a BPSK system in the secondary modulation modulated at a transmitter. The input area of each matched filter of I and Q channels includes a pair of adders. One adder generates a first signal having a positive in-phase and a positive quadrature component. The other adder generates a second signal having a negative in-phase component and a positive quadrature component.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: June 26, 2001
    Assignee: Yozan Inc.
    Inventors: Chanming Zhou, Guoliang Shou
  • Discrete cosine transformation circuit
    Patent number: 5862070
    Abstract: A high-speed discrete cosine transformation circuit includes the one-dimensional input signals x(0) to x(7) being input in parallel to the positive input terminals "+" or the negative input terminals "-" of eight neural operation units (NOU) 11 to 18 through capacitors d0 to d6. In each NOU 11 to 18, input signals x(0) to x(7) are added and subtracted. Input signals x(0) to x(7) are multiplied beforehand by the coefficient in proportion to the capacities of capacitors d0 to d6 which are connected to NOU 11 to 18. Thereafter, discrete cosine transforming coefficients y(0) to y(7) are output. A two-dimensional discrete cosine transformation circuit is realized by using the one-dimensional discrete cosine transforming circuit.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: January 19, 1999
    Assignees: Yozan Inc., Sharp Kabushiki Kaisha
    Inventors: Guoliang Shou, Jie Chen, Chanming Zhou, Sunao Takatori
  • Filter circuit for communication
    Patent number: RE37953
    Abstract: The present invention has an object to provide a filter circuit for communication generative an effective digital output as well as an analog output in a filter circuit of low electric power consumption. The function speed of an A/D converting circuit is minimized by intermittently holding an analog output signal according to an experience that peak detection can be performed by partially sampling the signal after the acquisition.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: December 31, 2002
    Assignees: NTT Do Co Mo Inc., Yozan, Inc.
    Inventors: Guoliang Shou, Chanming Zhou, Makoto Yamamoto, Mamoru Sawahashi, Fumiyuki Adachi, Sunao Takatori