Patents by Inventor Chua Beng Huat

Chua Beng Huat 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).

  • Digital modulation and demodulation technique for reliable wireless (both RF and IR) and wired high bandwidth data transmission
    Patent number: 7289560
    Abstract: A communication system compensates pulse positioned modulated data signals for channel induced intersymbol interference and extracts pulse positioned encoded data from a received signal corrupted with the channel induced intersymbol interference. The communication system has a transmitter and a receiver. The transmitter includes a modulation apparatus that has a symbol mapping circuit, which receives data symbols to be transmitted and maps the data symbols to a transmission code. The receiver has a demodulation apparatus to recover data symbols in the presence of the channel induced intersymbol interference. The demodulation apparatus has a sampling circuit in communication with a signal receiving circuit within the receiver to sample at a regular period received data symbols acquired by the receiving circuit. The samples of the data samples are retained by a sample retaining circuit in communication with the sampling circuit.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: October 30, 2007
    Assignee: FreeSystems Pte. Ltd.
    Inventor: Chua Beng Huat
  • Digital modulation and demodulation technique for reliable wireless (both RF and IR) and wired high bandwidth data transmission
    Publication number: 20040141568
    Abstract: A communication system compensates pulse positioned modulated data signals for channel induced intersymbol interference and extracts pulse positioned encoded data from a received signal corrupted with the channel induced intersymbol interference. The communication system has a transmitter and a receiver. The transmitter includes a modulation apparatus that has a symbol mapping circuit, which receives data symbols to be transmitted and maps the data symbols to a transmission code. The receiver has a demodulation apparatus to recover data symbols in the presence of the channel induced intersymbol interference. The demodulation apparatus has a sampling circuit in communication with a signal receiving circuit within the receiver to sample at a regular period received data symbols acquired by the receiving circuit. The samples of the data samples are retained by a sample retaining circuit in communication with the sampling circuit.
    Type: Application
    Filed: January 17, 2003
    Publication date: July 22, 2004
    Applicant: Free Systems Pte. Ltd.
    Inventor: Chua Beng Huat