Severine E Catreux

US Patent:

6802035, Oct 5, 2004

Filed:

Apr 1, 2002

Appl. No.:

10/072359

Inventors:

Severine Catreux - San Jose CA
David Gesbert - Oslo, NO
Manish Airy - San Jose CA

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 1100

US Classification:

714746, 714704, 714774, 370252, 370345, 455 6713, 455102

Abstract:

The present invention includes a method of optimizing a transmission mode of wirelessly transmitted data. The method includes selecting a first transmission mode based on a predetermined channel database and a first channel characterization. The first channel characterization can be based upon signals transmitted in an initial mode. An error factor is generated based on a difference between an estimated performance characteristic, and an expected performance characteristic. A subsequent transmission mode is selected based upon the predetermined channel database, the error factor and a subsequent channel characterization. The predetermined channel database can include a predetermined look-up-table that provides transmission mode selections based upon the channel characterizations. The look-up-table generally includes a plurality of quality parameter thresholds that determine the selection of a transmission mode. Another method includes receiving transmission signals that include data encoded in an initial transmission mode.

US Patent:

7191381, Mar 13, 2007

Filed:

Dec 5, 2000

Appl. No.:

09/730687

Inventors:

David J. Gesbert - Mountain View CA, US
Severine E. Catreux - San Jose CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H03M 13/00

US Classification:

714759

Abstract:

A method and medium tangibly embodying the method of constructing a lookup table of modes for encoding data for transmission in a wireless communication channel from a transmit unit to a receive unit by using at least one quality parameter of the data and its first-order and second-order statistical parameters to arrange the modes in the lookup table. The first-order and second-order statistical parameters can be determined from a simulation of the wireless communication channel or from field measurements of the wireless communication channel. The modes in the lookup table are ordered by a target value of a communication parameter such as PER, BER, data capacity, signal quality, spectral efficiency, throughput or another suitable communication parameter set to achieve a desired quality of service. The quality parameter selected is conveniently a short-term quality parameter such as signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR) or power level. During use adjustments depending on the instantaneous condition of the channel can be used to tune the lookup table.

US Patent:

7502432, Mar 10, 2009

Filed:

Jul 13, 2004

Appl. No.:

10/891443

Inventors:

Severine Catreux - Cardiff CA, US
Vinko Erceg - Cardiff CA, US
Pieter Roux - San Diego CA, US
Pieter Van Rooyen - San Diego CA, US
Jack Winters - Middletown NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7/10

US Classification:

375347

Abstract:

A signal weighting and combining method implemented within a receiver having a plurality of receive antennas is disclosed herein. Each receive antenna is disposed to produce a received RF signal in response to a transmitted RF signal received through a channel. The method includes weighting the plurality of received RF signals produced by the antennas in accordance with a corresponding plurality of RF weighting values selected to minimize an output bit error rate of the receiver, thereby forming a plurality of weighted RF signals. The method further includes combining ones of the plurality of weighted RF signals in order to form one or more combined RF signals. A similar splitting and weighting method capable of being implemented within a transmitter having a plurality of transmit antennas is also disclosed.

US Patent:

7535969, May 19, 2009

Filed:

Jul 29, 2004

Appl. No.:

10/903876

Inventors:

Severine Catreux - Cardiff CA, US
Vinko Erceg - Cardiff CA, US
Pieter Roux - San Diego CA, US
Pieter van Rooyen - San Diego CA, US
Jack Winters - Middletown NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7/02
H04L 1/02

US Classification:

375267, 375260, 375299, 375347, 375349, 455506, 455 65, 455101, 455137

Abstract:

A system and method for generating transmit weighting values for signal weighting that may be used in various transmitter and receiver structures is disclosed herein. The weighting values are determined as a function of frequency based upon a state of a communication channel and the transmission mode of the signal. In variations, weighting of the weighted signal that is transmitted through each of a plurality of antennas is carried out with one of a corresponding plurality of transmit antenna spatial weights. In these variations, a search may be conducted over various combinations of transmit weighting values and transmit antenna spatial weights in order to find a weight combination that optimizes a performance measure such as the output signal-to-noise ratio, the output bit error rate or the output packet error rate.

US Patent:

7539274, May 26, 2009

Filed:

Apr 29, 2004

Appl. No.:

10/835255

Inventors:

Severine Catreux - Cardiff CA, US
Vinko Erceg - Cardiff CA, US
Pieter Roux - San Diego CA, US
Pieter Van Rooyen - San Diego CA, US
Jack Winters - Middletown NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7/10

US Classification:

375347, 375349

Abstract:

A signal weighting and combining method implemented within a receiver having a plurality of receive antennas is disclosed herein. Each receive antenna is disposed to produce a received RF signal in response to a transmitted RF signal received through a channel. The method includes weighting the plurality of received RF signals produced by the antennas in accordance with a corresponding plurality of RF weighting values selected to maximize an output signal-to-noise ratio of the receiver averaged over the channel, thereby forming a plurality of weighted RF signals. The method further includes combining ones of the plurality of weighted RF signals in order to form one or more combined RF signals. A similar splitting and weighting method capable of being implemented within a transmitter having a plurality of transmit antennas is also disclosed.

US Patent:

7577118, Aug 18, 2009

Filed:

Jul 24, 2001

Appl. No.:

09/912814

Inventors:

Luc Haumonte - San Jose CA, US
Severine Catreux - San Jose CA, US
David Gesbert - Oslo, NO
Ivana Stojanovic - Palo Alto CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04W 4/00

US Classification:

370330, 370252, 4554522

Abstract:

Embodiments of a system and method of classifying remote users according to link quality, and scheduling wireless transmission of information to the users based upon the classifications are generally disclosed.

US Patent:

7583609, Sep 1, 2009

Filed:

Nov 16, 2004

Appl. No.:

10/990676

Inventors:

Severine Catreux - San Jose CA, US
David Gesbert - Oslo, NO
Manish Airy - San Jose CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 11/00
H04J 3/22

US Classification:

370252, 370465

Abstract:

The present invention includes a method of optimizing a transmission mode of wirelessly transmitted data. The method includes selecting a first transmission mode based on a predetermined channel database and a first channel characterization. The first channel characterization can be based upon signals transmitted in an initial mode. An error factor is generated based on a difference between an estimated performance characteristic, and an expected performance characteristic. A subsequent transmission mode is selected based upon the predetermined channel database, the error factor and a subsequent channel characterization. The predetermined channel database can include a predetermined look-up-table that provides transmission mode selections based upon the channel characterizations. The look-up-table generally includes a plurality of quality parameter thresholds that determine the selection of a transmission mode. Another method includes receiving transmission signals that include data encoded in an initial transmission mode.

US Patent:

7761775, Jul 20, 2010

Filed:

Jul 1, 2004

Appl. No.:

10/884102

Inventors:

David J. Gesbert - Moutain View CA, US
Severine E. Catreux - San Jose CA, US
Arogyaswami J. Paulraj - Stanford CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H03M 13/00

US Classification:

714774, 714759, 375222

Abstract:

A method and communication system for selecting a mode for encoding data for transmission in a wireless communication channel between a transmit unit and a receive unit. The data is initially transmitted in an initial mode and the selection of the subsequent mode is based on a selection of first-order and second-order statistical parameters of short-term and long-term quality parameters. Suitable short-term quality parameters include signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR), power level and suitable long-term quality parameters include error rates such as bit error rate (BER) and packet error rate (PER). The method of the invention can be employed in Multiple Input Multiple Output (MIMO), Multiple Input Single Output (MISO), Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) communication systems to make subsequent mode selection faster and more efficient. Furthermore the method can be used in communication systems employing various transmission protocols including OFDMA, FDMA, CDMA, TDMA.