Patents by Inventor Frank Martin van Heeswyk

Frank Martin van Heeswyk 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).

  • Predictive rake receiver for CDMA mobile radio systems
    Patent number: 6370183
    Abstract: A rake receiver with a finger for each of a plurality of multipath components displaced in time has provision for predicting short-term variations in the strength of each component and adapting the coefficients of each finger accordingly, thus reducing the error rate, particularly in high-data-rate applications in a time-variant environment.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: April 9, 2002
    Assignee: Nortel Networks Limited
    Inventors: Paul Newson, Frank Martin van Heeswyk
  • Multiple user CDMA basestation modem
    Patent number: 6333926
    Abstract: A CDMA modem with dynamically allocatable demodulation and modulation, encoding/interleaving and decoding/de-interleaving for multiple resources users is provided. Each component is individually configurable to function as any one of various physical layer channel types for one or more different CDMA standards.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: December 25, 2001
    Assignee: Nortel Networks Limited
    Inventors: Frank Martin Van Heeswyk, Paul Newson
  • Interference cancellation system and method and CDMA receiver including an interference cancellation circuit
    Patent number: 6333947
    Abstract: Systems and methods for cancelling interference in received CDMA signals due to known components in the received signals which have been digitized to form a composite digitized baseband signal, for example due to pilot channel components in received CDMA IS-95 3G compliant signals which would otherwise interfere with the detection of unknown data streams. The pilot channel signals are detected, and an estimate of the air interface for each pilot channel signal is made. The pilot channel signals are then passed through a respective model of the air interface, and the resulting output is subtracted from the composite digitized baseband signal, thereby removing interference due to the pilot channel signals.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: December 25, 2001
    Assignee: Nortel Networks Limited
    Inventors: Frank Martin van Heeswyk, Paul Newson
  • CDMA pseudo-smart antenna selection
    Patent number: 6320898
    Abstract: A CDMA base station servicing a plurality of mobile stations in a plurality of sectors monitors the reverse-link signal strength received by each antenna for each mobile station, and accordingly determines an optimum combination of antennas for forward-link transmission to each mobile station, whereby transmission to each mobile station may be accomplished with lower power, and whereby the dropped-call rate is reduced.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: November 20, 2001
    Assignee: Nortel Networks Limited
    Inventors: Paul Newson, Frank Martin van Heeswyk
  • System and method for cancelling the extra interference created during position location in a CDMA cellular system
    Patent number: 6298050
    Abstract: Systems and methods for cancelling interference in received CDMA signals due to signals of users involved in position location in the received signals which have been digitized to form a composite digitized baseband signal which would otherwise interfere with the detection of other user's data streams. The particular user's signals are detected, and an estimate of the air interface for that user is made. The user's signals are then passed through a model of the air interface, and the resulting output is subtracted from the composite digitized baseband signal, thereby removing interference due to that user's signals.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: October 2, 2001
    Assignee: Nortel Networks Limited
    Inventors: Frank Martin van Heeswyk, Paul Newson