Patents by Inventor Chi Nche

Chi Nche 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).

  • Universal repeater for communication systems
    Patent number: 6684058
    Abstract: A system and method for converting carrier frequencies of a wireless communication system is provided. The system and method allow expansion of coverage areas of wireless communication systems, such as a mobile/cellular telephone system. In one embodiment, the system converts RF signals in the PCS band to ISM band, and transmits the ISM signals to a distant repeater station. The repeater station receives the ISM signals and down converts the ISM signals to the PCS band. The PCS signals are retransmitted in a new cell thereby creating a new coverage area. Radio frequency signals are down converted to an Intermediate frequency for channel selectivity and narrow band filtering. Channel selectivity circuitry allows quick reuse of other channels in the same cell. The channel selectivity circuitry includes a SAW filter which significantly reduces out of band interference.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: January 27, 2004
    Assignee: Wireless Facilities, Inc.
    Inventors: Ulun Karacaoglu, Baya Hatim, Chi Nche, Masood K. Tayebi
  • Inter-band communication repeater system
    Patent number: 6484012
    Abstract: A system and method for converting carrier frequencies of a wireless communication system is provided. The system and method allow expansion of coverage areas of wireless communication systems, such as a mobile/cellular telephone system. In one embodiment, the system converts RF signals in the PCS band to ISM band, and transmits the ISM signals to a distant repeater station. The repeater station receives the ISM signals and downconverts the ISM signals to the PCS band. The PCS signals are retransmitted in a new cell thereby creating a new coverage area.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: November 19, 2002
    Assignee: Wireless Facilities, Inc.
    Inventors: Chi Nche, Ulun Karacaoglu
  • Wireless multimedia carrier system
    Patent number: 6373827
    Abstract: A system and method for communication of radio frequency (RF) signals over multimedia signal paths. The invention provides a wireless multimedia carrier (WMC) system capable of receiving a variety of standardized input signals, such as DS0/E0, T1/E1, T2/E2, and/or T3/E3 for transmission using RF channels. The WMC system selectively employs time division multiple access (TDMA) and/or code division multiple access (CDMA) technology. The WMC system transmits the various signal inputs using RF carriers, receives the transmitted signals, and converts the signals to the desired signaling scheme (standard) for forwarding to intended destinations.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: April 16, 2002
    Assignee: Wireless Facilities, Inc.
    Inventors: Masood K. Tayebi, Baya Hatim, Saeid Safavi, Chi Nche, Ismail Lakkis, Cathal O'Scolai, Deirdre O'Shea, Joseph J. Roy, Ulun Karacaoglu, Hoang Xuan Bui