Patents by Inventor Amir Francos
Amir Francos 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).
-
Patent number: 9338791Abstract: There is provided a method and apparatus for allocating transmission resources in a wireless network in which some of the terminals communicate with the base station by exchanging communication frames that are compatible with a first communication protocol while other terminals receive communications from the base station that are compatible with a second communication protocol by using non-standardized communication frames or communication frames that are compatible with another standardized protocol. The base station transmits a plurality of frames, some of which are compatible with the first communication protocol while others—with the second communication protocol.Type: GrantFiled: March 11, 2008Date of Patent: May 10, 2016Assignee: ALVARION LTD.Inventors: Dan Stopler, Amir Francos
-
Patent number: 8488536Abstract: A method for transmission mode selection in a MIMO radio system between a spatial diversity (A-matrix) mode and a spatial multiplexing (B-matrix) mode comprises: obtaining a channel condition number; if the channel condition number is above a selected threshold, and a signal to interference plus noise ratio exceeds a predetermined threshold then selecting spatial multiplexing; and otherwise selecting spatial diversity.Type: GrantFiled: December 10, 2009Date of Patent: July 16, 2013Assignee: Alvarion Ltd.Inventor: Amir Francos
-
Publication number: 20100157925Abstract: A method for transmission mode selection in a MIMO radio system between a spatial diversity (A-matrix) mode and a spatial multiplexing (B-matrix) mode comprises: obtaining a channel condition number; if the channel condition number is above a selected threshold, and a signal to interference plus noise ratio exceeds a predetermined threshold then selecting spatial multiplexing; and otherwise selecting spatial diversity.Type: ApplicationFiled: December 10, 2009Publication date: June 24, 2010Applicant: Alvarion Ltd.Inventor: Amir Francos
-
Publication number: 20100087227Abstract: A multi-transmitter base station for wireless digital communication, having beam forming and digital pre-distortion capabilities, including a shared feedback unit for providing feedback of outgoing Radio Frequency (RF) signals for calibrating a plurality of antennas and for adapting the digital pre-distortion. Related apparatus and methods are also described.Type: ApplicationFiled: October 2, 2008Publication date: April 8, 2010Applicant: Alvarion Ltd.Inventors: Amir FRANCOS, Anatoly Sloushch, David Shechter
-
Publication number: 20090232092Abstract: There is provided a method and apparatus for allocating transmission resources in a wireless network in which some of the terminals communicate with the base station by exchanging communication frames that are compatible with a first communication protocol while other terminals receive communications from the base station that are compatible with a second communication protocol by using non-standardized communication frames or communication frames that are compatible with another standardized protocol. The base station transmits a plurality of frames, some of which are compatible with the first communication protocol while others—with the second communication protocol.Type: ApplicationFiled: March 11, 2008Publication date: September 17, 2009Applicant: Alvarion Ltd.Inventors: Dan Stopler, Amir Francos
-
Patent number: 7471935Abstract: A source binary code that complies with a source architecture is translated to a target binary code that complies with a target architecture. The target binary code includes a first target portion translated from a respective source portion of the source binary code. During execution of the target binary code on a processor that complies with a target architecture, it is determined whether to retranslate the source portion to produce a second target portion that is more optimized to the target architecture than the first target portion or to retranslate the source portion to produce a third target portion that is more optimized to the target architecture than the second target portion.Type: GrantFiled: June 1, 2004Date of Patent: December 30, 2008Assignee: Intel CorporationInventors: Ilan Barak, Amir Francos, Dimitry Petrov
-
Patent number: 7003051Abstract: In an embodiment, a transmitter section for a mobile device includes a predistorter for predistorting an input signal input to a modulation section. Predistortion values may be selected from a look-up table in response to a fed back signal from the output of the modulation section. A delay between the input signal and the fed back signal may be determined in two stages: a coarse delay estimation for determining a whole number of sample cycles, and a fine delay estimation for determining a fraction of a sample cycle to be added to the coarse delay estimation value.Type: GrantFiled: October 16, 2001Date of Patent: February 21, 2006Assignee: Intel CorporationInventors: Amir Francos, Daniel Yellin, Eran Gureshnik
-
Patent number: 6898252Abstract: A method of assigning values to parameters for IQ mismatch cancellation. The method includes providing values to a processing path of a communication device, passing the provided values through an IQ modulator, at least one non-linear element and an IQ demodulator, to produce distorted values, and estimating at least one parameter for cancellation of IQ mismatch effects of the communication device responsive to the provided values and to the distorted values.Type: GrantFiled: July 21, 2000Date of Patent: May 24, 2005Assignee: Intel CorporationInventors: Daniel Yellin, Amir Francos
-
Publication number: 20050025255Abstract: A transmitter has a transmission path with an IQ modulator and a feedback path with an IQ demodulator. DC offset is determined by estimating a DC offset of the IQ demodulator, adaptively estimating a DC offset of the IQ modulator at least partially from the demodulator DC offset, subtracting the estimated demodulator DC offset from the feedback path and subtracting the estimated modulator DC offset from the transmission path.Type: ApplicationFiled: August 25, 2004Publication date: February 3, 2005Inventors: Amir Francos, Ilan Barak, Daniel Yellin
-
Publication number: 20040219944Abstract: A source binary code that complies with a source architecture is translated to a target binary code that complies with a target architecture. The target binary code includes a first target portion translated from a respective source portion of the source binary code. During execution of the target binary code on a processor that complies with a target architecture, it is determined whether to retranslate the source portion to produce a second target portion that is more optimized to the target architecture than the first target portion or to retranslate the source portion to produce a third target portion that is more optimized to the target architecture than the second target portion.Type: ApplicationFiled: June 1, 2004Publication date: November 4, 2004Inventors: Ilan Barak, Amir Francos, Dimitry Petrov
-
Patent number: 6801581Abstract: A transmitter has a transmission path with an IQ modulator and a feedback path with an IQ demodulator. DC offset is determined by estimating a DC offset of the IQ demodulator, adaptively estimating a DC offset of the IQ modulator at least partially from the demodulator DC offset, subtracting the estimated demodulator DC offset from the feedback path and subtracting the estimated modulator DC offset from the transmission path.Type: GrantFiled: September 13, 2000Date of Patent: October 5, 2004Assignee: Intel CorporationInventors: Amir Francos, Ilan Barak, Daniel Yellin
-
Patent number: 6741662Abstract: A method of generating values of a predistortion look up table for linearization of a transmitter. The method includes accumulating a plurality of pairs of values representing input and output values of samples entering one or more non-linear elements of the transmitter, fitting the pairs of values into a parameteric model of at least one of the one or more non-linear elements, so as to determine values for the parameters of the parameteric model, and generating values of the look up table responsive to the fitted parameteric model.Type: GrantFiled: April 17, 2000Date of Patent: May 25, 2004Assignee: Intel CorporationInventors: Amir Francos, Ilan Barak, Daniel Yellin, Avner Dor
-
Publication number: 20030072388Abstract: In an embodiment, a transmitter section for a mobile device includes a predistorter for predistorting an input signal input to a modulation section. Predistortion values may be selected from a look-up table in response to a fed back signal from the output of the modulation section. A delay between the input signal and the fed back signal may be determined in two stages: a coarse delay estimation for determining a whole number of sample cycles, and a fine delay estimation for determining a fraction of a sample cycle to be added to the coarse delay estimation value.Type: ApplicationFiled: October 16, 2001Publication date: April 17, 2003Inventors: Amir Francos, Daniel Yellin, Eran Gureshnik