Patents by Inventor Steven P. Chen

Steven P. Chen 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).

  • Publication number: 20030021271
    Abstract: A wireless network of multiple base stations, each communicating with multiple remote terminals, exhibiting simpler design and enhanced inter-user and inter-base interference rejection. The downlink from a base to the multiple remote terminals employs a combination of time division multiplexing (TDM) and time division multiple access (TDMA) to multiplex signals carrying data to the remote terminals, and spreads the multiplexed signal with a pseudo-random noise (PN) sequence. The uplink from each remote terminal to the respective base uses orthogonal code division multiple access (O-CDMA) coding to multiplex a variable number of channels for each remote terminal. Short O-code sequences are derived based on pseudo-random maximal length sequences and quadratic residue sequences to introduce sufficient randomness into the multiple access coding to reject inter-base interference without the use of PN signal spectrum spreading.
    Type: Application
    Filed: April 3, 2001
    Publication date: January 30, 2003
    Inventors: Donald K. Leimer, Charles R. Cahn, Steven P. Chen, James R. Luecke, Adam Efron