Jack T Winters

US Patent:

7391832, Jun 24, 2008

Filed:

Dec 10, 2004

Appl. No.:

11/009503

Inventors:

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 1/10

US Classification:

375349, 375316, 375346

Abstract:

Systems and methods that provide channel bonding in multiple antenna communication systems are provided. In one embodiment, a method for signal transmission over a plurality of antennas of a transmitter may include, for example, one or more of the following: demultiplexing an input signal into a plurality of signal components; assigning each of the signal components to one of a plurality of logical channels; weighting each of the signal components with transmit baseband weight values; combining ones of the resultant weighted signal components to form a plurality of transmit weighted signals, each of the plurality of transmit weighted signals being assigned to one of the plurality of logical channels; and combining groups of the plurality of transmit weighted signals to form a plurality of output signals capable of being used to generate a plurality RF output signals.

US Patent:

7483718, Jan 27, 2009

Filed:

Oct 1, 2004

Appl. No.:

10/957398

Inventors:

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 1/38
H04M 1/00

US Classification:

4555621, 455103, 4552772

Abstract:

Systems and methods that provide antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a system that selects N antenna elements in an M-antenna-element transmitter or an M-antenna-element receiver, in which N is less than M, may include, for example, M antenna elements in the M-antenna-element transmitter or the M-antenna-element receiver; N RF chains; and a switch coupled to the N RF chains. The M-antenna-element receiver may determine a bit error rate for each possible N antenna element subset of the M antenna elements. The M-antenna-element receiver may determine the particular N antenna element subset with a lowest bit error rate. In response to the determination of the particular N antenna element subset with the lowest bit error rate, the switch may couple the N RF chains to the particular N antenna element subset with the lowest bit error rate.

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:

7515939, Apr 7, 2009

Filed:

Nov 3, 2004

Appl. No.:

10/979992

Inventors:

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 1/38

US Classification:

4555621, 455103, 4552772, 375347

Abstract:

Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.

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:

7822140, Oct 26, 2010

Filed:

Mar 16, 2004

Appl. No.:

10/801930

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

US Classification:

375267, 375260, 375295, 375306, 375307, 375309, 375347

Abstract:

A receiver operatively coupled to an antenna structure capable of receiving a first plurality of RF signals is disclosed herein. The receiver includes an RF processing network operative to perform weighting and combining operations within the RF domain using the first plurality of RF signals so as to produce a second plurality of RF signals. Also provided is a downconverter configured to downconvert the second plurality of RF signals into a second plurality of down-converted signals. In alternate implementations certain of the weighting and combining operations are performed at baseband and the remainder effected within the RF domain. A transmitter of corresponding architecture is also disclosed.

US Patent:

7840235, Nov 23, 2010

Filed:

Apr 3, 2009

Appl. No.:

12/418091

Inventors:

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 1/38

US Classification:

4555621, 455103, 4552772, 375347

Abstract:

Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.