Christopher J Hansen

US Patent:

6567520, May 20, 2003

Filed:

Feb 17, 1999

Appl. No.:

09/251174

Inventors:

Timothy F. Murphy - Ramona CA
Christopher R. Hansen - Grass Valley CA

Assignee:

3Com Corp. - Santa Clara CA

International Classification:

H04M 300

US Classification:

379377, 379164

Abstract:

A method and apparatus for the detection of one or more telephone off-hook conditions using an analog-to-digital converter to detect voltage changes between tip and ring lines of a telephone network loop. An isolation network provides substantial electrical isolation for a detection device from voltage surges on the tip and ring lines of a âplain old telephone systemâ (POTS) network. The isolation network also provides a minimal load on the POTS wiring system, so as not to cause a false detection of an off-hook condition by central office equipment. A gain amplifier is used to scale the tip and ring voltage to a suitable range for an analog-to-digital converter (ADC). The ADC outputs a digital voltage value to a decision-making element, such as a microprocessor, a digital signal processor, or a state machine. The decision-making element can detect when multiple POTS devices coupled to the network wiring loop go into an off-hook state. The invention can also detect and compensate for a tip/ring wiring pair reversal and is highly reliable.

US Patent:

8170496, May 1, 2012

Filed:

Apr 22, 2009

Appl. No.:

12/428169

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Jeyhan Karaoguz - Irvine CA, US
Jason A. Trachewsky - Menlo Park CA, US
Vinko Erceg - Cardiff by the Sea CA, US
Christopher J. Hansen - Sunnyvale CA, US
Matthew J. Fischer - Mountain View CA, US
Murat Mese - Rancho Palos Verdes CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H01Q 3/00
H04B 1/38
H04B 7/02

US Classification:

455 73, 4555621

Abstract:

A wireless transceiver includes at least one phased array antenna, that transmits an outbound RF signal containing outbound data to at least one remote transceiver and that receives an inbound RF signal containing inbound data from the at least one remote RF transceiver, wherein the at least one phased array antenna is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the phased array antenna to hop among a plurality of radiation patterns based on a hopping sequence. At least one RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal.

US Patent:

8175542, May 8, 2012

Filed:

Apr 22, 2009

Appl. No.:

12/428185

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Jeyhan Karaoguz - Irvine CA, US
Jason A. Trachewsky - Menlo Park CA, US
Vinko Erceg - Cardiff by the Sea CA, US
Christopher J. Hansen - Sunnyvale CA, US
Matthew J. Fischer - Mountain View CA, US
Murat Mese - Rancho Palos Verdes CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/38
H04B 7/02
H01Q 3/00

US Classification:

455 73, 4555621

Abstract:

A wireless transceiver includes a phased array of antennas, that transmit an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the phased array of antennas is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the phased array of antennas to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected antenna of the phased array of antennas to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna of the phased array of antennas.

US Patent:

8385844, Feb 26, 2013

Filed:

Apr 2, 2012

Appl. No.:

13/437349

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Jeyhan Karaoguz - Irvine CA, US
Jason A. Trachewsky - Menlo Park CA, US
Vinko Erceg - Cardiff by the Sea CA, US
Christopher J. Hansen - Los Altos CA, US
Matthew James Fischer - Mountain View CA, US
Murat Mese - Rancho Palos Verdes CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/38
H04B 7/10
H04B 15/00

US Classification:

455 73, 455 631, 4555621

Abstract:

A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array.

US Patent:

8553659, Oct 8, 2013

Filed:

Mar 10, 2009

Appl. No.:

12/401222

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Christopher Hansen - Sunnyvale CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04W 4/00
H04W 84/12
H04W 84/18

US Classification:

370338, 370337, 455442, 4555621

Abstract:

Aspects of a method and system for optimal beamforming in a wireless network are presented. Aspects of the system may include one or more processors for use in a requesting communication device wherein the one or more processors may be operable to request a transmission time slot allocation. A determination may be made by a coordinating communication device as whether to assign a sector transmission time slot and/or beamforming transmission time slot to the requesting communication device based on the transmission time slot allocation request. The one or more processors may be operable to receive the assigned sector transmission time slot and/or beamforming transmission time slot.

US Patent:

8577416, Nov 5, 2013

Filed:

Jan 25, 2013

Appl. No.:

13/750177

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Jeyhan Karaoguz - Irvine CA, US
Jason A. Trachewsky - Menlo Park CA, US
Vinko Erceg - Cardiff by the Sea CA, US
Christopher J. Hansen - Los Altos CA, US
Matthew James Fischer - Mountain View CA, US
Murat Mese - Rancho Palos Verdes CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/44
H01Q 3/00

US Classification:

4555621, 455 77

Abstract:

A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array.

US Patent:

8611821, Dec 17, 2013

Filed:

Apr 28, 2009

Appl. No.:

12/431085

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Jeyhan Karaoguz - Irvine CA, US
Jason A. Trachewsky - Menlo Park CA, US
Vinko Erceg - Cardiff by the Sea CA, US
Matthew J. Fischer - Mountain View CA, US
Christopher J. Hansen - Sunnyvale CA, US
Murat Mese - Rancho Palos Verdes CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04M 1/00
H04W 72/00
H04L 12/413
H04L 12/28
G08C 15/00
H04B 15/00

US Classification:

455 631, 4555521, 455450, 370445, 370431, 370252

Abstract:

An adaptive communication device includes a transceiver that communicates with a first remote communication device in a millimeter wave frequency band in accordance with a first protocol. The transceiver generates conflict detection signals based on signals received from a second remote communication device that communicates in accordance with a second protocol. A conflict detection module detects communication by the second communication device based on the conflict detection signals and generates a model trigger signal in response thereto. A conflict modeling module responds to the model trigger signal by generating idle prediction data based on the conflict detection signals, wherein the idle prediction data predicts an idle period in the communications by the second remote communication device. A transmission control module generates transmit control signals based on the idle prediction data, wherein the transceiver times transmissions sent to the first remote communication device based on the transmit control signals.

US Patent:

8644770, Feb 4, 2014

Filed:

Nov 3, 2009

Appl. No.:

12/611490

Inventors:

Saishankar Nandagopalan - San Diego CA, US
Christopher J. Hansen - Sunnyvale CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/00
H04B 7/00

US Classification:

455 69

Abstract:

Protocol adaptation layer for wireless communications. Communication devices that include one or more radio modules operable in accordance with multiple communication protocols establish communications using one communication protocol and then switch to another communication protocol. This switching to another communication protocol may be performed based on a variety of factors including effectuating communications of higher throughput, supporting uni-directional communications vs. bi-directional communications, or any other desired factor. In some embodiments, various communication devices include two radio modules that are each implemented to operate in accordance with one particular communication protocol. Alternatively, a multi-protocol capable radio module may support and operate in accordance with more than one communication protocol. Examples of possible communication protocols include those compliant with Bluetooth, IEEE 802.