Carlos F Aldana

US Patent:

7693228, Apr 6, 2010

Filed:

Dec 9, 2005

Appl. No.:

11/298157

Inventors:

Carlos Aldana - San Francisco CA, US
Jason A. Trachewsky - Menlo Park CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7/02

US Classification:

375267, 375259, 375219, 375295, 375316, 370208, 370210

Abstract:

A general architecture scheme to perform channel estimation on orthogonal transmissions for any number of transmitting antennas present. Generally, the channel estimation is applicable for wireless communications in a MIMO system.

US Patent:

7916807, Mar 29, 2011

Filed:

Oct 17, 2007

Appl. No.:

11/873626

Inventors:

Carlos Aldana - San Francisco CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 27/04

US Classification:

375299

Abstract:

Aspects of a method and system for choice of a steering matrix (Q) for sounding in antenna selection are presented. Aspects of the system may include a transmitting station that enables determination of values for a plurality of matrix elements, which are represented in a steering matrix (Q). The contents of the steering matrix may be determined based on the contents of a plurality of protocol data units (PDU). Each of the PDUs may comprise a sounding frame. One or more space-time signals may be generated based on the plurality of PDUs. One or more transmit chain signals may be generated by multiplying a vector representation, which comprises the one or more space-time signals, by the steering matrix. One or more transmit chain signals may be transmitted via transmitting antennas selected from a plurality of transmitting antennas.

US Patent:

8416862, Apr 9, 2013

Filed:

Sep 28, 2005

Appl. No.:

11/237341

Inventors:

Carlos Aldana - San Francisco CA, US
Joonsuk Kim - San Jose CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04K 1/10

US Classification:

375260, 375267, 375350

Abstract:

A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device. The receiving wireless device may transform the estimated transmitter beamforming unitary matrix using a QR decomposition operation such as a Givens Rotation operation to produce the transformer beamforming information.

US Patent:

20080014892, Jan 17, 2008

Filed:

Feb 28, 2007

Appl. No.:

11/680325

Inventors:

Carlos Aldana - San Francisco CA, US

International Classification:

H04B 1/06

US Classification:

4552771

Abstract:

Aspects of a method and system for an antenna selection algorithm at the transmitter are presented. Aspects of a system for joint antenna selection may include a receiving mobile terminal that enables reception of a plurality of sounding frames via a plurality of receiving antennas. A processor may enable mapping of one of the plurality of receiving antennas to one of a plurality of received radio frequency (RF) chain signals based on the reception of the plurality of sounding frames. The receiving mobile terminal may enable transmission of antenna selection feedback information computed based on the reception of the plurality of sounding frames.

US Patent:

20090285264, Nov 19, 2009

Filed:

May 12, 2009

Appl. No.:

12/464732

Inventors:

Carlos Aldana - San Francisco CA, US
David Lam - Fremont CA, US

International Classification:

H04B 1/00
H04L 27/00

US Classification:

375139, 375342, 375E01001

Abstract:

Aspects of a method and system for detection of long pulse bin 5 RADARs in the presence of Greenfield packets are presented. In one aspect of the system, a processor in a wireless communication device may receive a plurality of pulses via a received signal. The processor may select at least a portion of the received plurality of pulses. The processor may compute a time duration value and a pulse count value based on the selected at least a portion of the received plurality of pulses. The processor may determine whether the received signal comprises a RADAR transmission signal based on the computed time duration value and the computed pulse count value when the time duration value is greater than or equal to a threshold time duration value and the pulse count value is greater than or equal to a minimum pulse count threshold value.

US Patent:

20200329494, Oct 15, 2020

Filed:

Jun 24, 2020

Appl. No.:

16/910957

Inventors:

Bishwarup Mondal - San Ramon CA, US
Prerana Rane - Santa Clara CA, US
Yongjun Kwak - Portland OR, US
Dae Won Lee - Portland OR, US
Carlos Aldana - Santa Clara CA, US
Salvatore Talarico - Los Gatos CA, US

International Classification:

H04W 74/08
H04W 48/16
H04W 72/04

Abstract:

An apparatus for use in a base station includes processing circuitry coupled to a memory. To configure the base station for channel access in a New Radio (NR) unlicensed (NR-U) network operating in an unlicensed spectrum, the processing circuitry is to perform an LBT procedure for a transmission occasion of a plurality of transmission occasions within a Discovery Measurement Timing Configuration (DMTC) window of a communication channel in the unlicensed spectrum. The transmission occasion is configured within a slot of a plurality of slots forming the DMTC window. A Discovery Reference Signal (DRS) is encoded for transmission to a UE on the communication channel, based on the successful completion of the LBT procedure. The DRS includes a PSS, a SSS, and a PBCH. A RACH procedure is performed with the UE, the RACH procedure initiated based on the PSS, the SSS, and the PBCH.

US Patent:

20150296552, Oct 15, 2015

Filed:

Mar 30, 2015

Appl. No.:

14/673399

Inventors:

- San Diego CA, US
Rolf De Vegt - San Francisco CA, US
Carlos Horacio Aldana - Mountain View CA, US

International Classification:

H04W 76/02
H04W 8/00
H04W 24/10

Abstract:

A wireless dockee or a wireless docking center may utilize a fine timing measurement procedure to determine propagation times for signals communicated between the devices. Based on the propagation time, the wireless dockee or the wireless docking center may calculate their proximity to each other. When the proximity supports a wireless docking session, the wireless dockee or the wireless docking center may initiate a wireless docking session. The wireless docking session may include docking the wireless dockee to the wireless docking center and/or undocking the wireless dockee to the wireless docking center.