Li Wen Chang

US Patent:

7873324, Jan 18, 2011

Filed:

Dec 21, 2007

Appl. No.:

11/962518

Inventors:

Jun Wu - San Diego CA, US
Hongwei Kong - Denville NJ, US
Li Fung Chang - Holmdel NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 17/00

US Classification:

455 6713, 455522, 455 6711, 455 631, 4552261, 4552262, 4552263, 455296, 375224, 375227, 375346, 370311, 370317, 370318, 370252

Abstract:

Apparatus and method for processing a received pilot to obtain noise estimation of a pilot channel and processing a received first signal channel, separately from a second signal channel that is orthogonal to the first signal channel, to obtain a signal level of the first signal channel. The noise estimation and the signal level are used to calculate a SNR value. Detection on the first channel is done by checking the SNR and the sign of a soft metric.

US Patent:

8306219, Nov 6, 2012

Filed:

Feb 14, 2006

Appl. No.:

11/353687

Inventors:

Yi Zhou - Carlsbad CA, US
Li Fung Chang - Holmdel NJ, US
Nelson Sollenberger - Farmingdale NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 29/06

US Classification:

380 37, 341 58, 380 28, 380 44

Abstract:

A method and system for ciphering interface with list processing is described. Various aspects of a system for ciphering interface with list processing may include a cipher module that enables deciphering and/or bit stuffing, in hardware, of a potion of one of a plurality of data blocks starting at any bit location that is subsequent to a first bit of the one of the plurality of data blocks. One of the plurality of data blocks may comprise at least one data word. A modulus of a number representing the bit location with respect to a number of bits in the one of the data words may be a number greater than 0. The cipher module may enable selection of any bit location based on and index and/or an offset. The cipher module may enable selection of deciphering and/or bit stuffing based on configured information.

US Patent:

20090180455, Jul 16, 2009

Filed:

Oct 29, 2008

Appl. No.:

12/260591

Inventors:

Mukundan Ranganathan - San Diego CA, US
Li Fung Chang - Holmdel NJ, US
Abhinav Prasad - Woodbridge NJ, US
Nelson Sollenberger - Farmingdale NJ, US
Jun Wu - San Diego CA, US

International Classification:

H04B 7/216

US Classification:

370342

Abstract:

Aspects of a method and system for CQI based adaptive diagonal loading for DMI-EQ in HSDPA receivers. A HSDPA enabled handset may comprise a minimum-mean-square (MMSE)-based direct matrix inversion (DMI) equalizer (DMI-EQ) for an advanced signal processing. The DMI-EQ may receive HSDPA signal in consecutive transmission time intervals (TTIs). A diagonal loaded DMI may be used for a robust solution of equalizer weights. The DMI diagonal loading coefficients may be determined based on the CQI value of the current TTI and apply to the DMI-EQ for the next TTI. The determined CQI may be derived from SNR information estimated via a reference signal in the received signal. A look-up table mechanism is provided to select a set of DMI diagonal coefficients for a determined CQI and a particular modulation type. The look-up table may comprise mappings between the CQI for a particular modulation type and various DMI diagonal coefficients.

US Patent:

20090180456, Jul 16, 2009

Filed:

Oct 29, 2008

Appl. No.:

12/260647

Inventors:

Khoi Ly - San Diego CA, US
Abhinav Prasad - Woodbridge NJ, US
Nelson Sollenberger - Farmingdale NJ, US
Li Fung Chang - Holmdel NJ, US
Jun Wu - San Diego CA, US

International Classification:

H04B 7/216

US Classification:

370342

Abstract:

Aspects of a method and system for adaptive quantization steps for HS-SCCH decoding using average CQI are provided. A HS-SCCH in a received HSDPA signal may be adaptively quantized before HS-SCCH decoding occurs. Quantization information may be determined based on a CQI value associated with the HS-PDSCH. A preferred soft bit precision and quantization geometry, which associated with the quantization information, for the given soft bit precision may be determined based on the CQI value. The received HS-SCCH data may be truncated with the determined soft bit precision in the determined quantization geometry, accordingly. A look-up table, which may comprise the mappings between CQI and quantization step information, may be used for selecting quantization step sizes in HS-SCCH quantizing in order to, for example, lower the complexity in HS-SCCH quantizing.

US Patent:

20220388632, Dec 8, 2022

Filed:

Aug 10, 2022

Appl. No.:

17/885082

Inventors:

- Chicago IL, US
Peter Aaron Koch - Kent WA, US
Li Chun Chang - Mt. Pleasant SC, US
Robert Hans Thim - Woodinville WA, US

International Classification:

B64C 21/10
B08B 17/06
B64D 15/12
B64D 15/16
B64D 15/00
B81C 1/00
B81B 3/00
B81B 7/00
B81B 7/02
B81B 7/04

Abstract:

Active surface structures comprise an exposed surface, a controlled group of MEMS (micro-electro-mechanical system) actuators, and a controlled region of the exposed surface corresponding to the controlled group. The controlled region has a first state, and a second state that is less textured than the first state. Active surface structures may be part of an apparatus that includes a controller and/or one or more sensors. The controller, sensors, and the controlled region may form a feedback loop in which the active surface structure is actively controlled.

US Patent:

20190329872, Oct 31, 2019

Filed:

Jul 10, 2019

Appl. No.:

16/508082

Inventors:

- Chicago IL, US
Peter Aaron Koch - Kent WA, US
Li Chun Chang - Mt. Pleasant SC, US
Robert Hans Thim - Woodinville WA, US

International Classification:

B64C 21/10
B64D 15/16
B64D 15/12
B64D 15/00
B81C 1/00
B81B 3/00
B08B 17/06
B81B 7/04
B81B 7/02
B81B 7/00

Abstract:

Active superhydrophobic surface structures are actively-controlled surface structures exhibiting a superhydrophobic state and an ordinary state. Active superhydrophobic surface structures comprise an outer elastomeric covering defining an exposed surface, a controlled group of MEMS (micro-electro-mechanical system) actuators at least covered by the elastomeric covering, and, a controlled region of the exposed surface corresponding to the controlled group. The controlled region has a superhydrophobic state in which the controlled region is textured. The controlled region also has an ordinary state in which the controlled region is smooth (i.e., less textured than in the superhydrophobic state). Active superhydrophobic surface structures may be part of an apparatus that includes a controller and/or one or more sensors. The controller, sensors, and the controlled region may form a feedback loop in which the active superhydrophobic surface is actively controlled.

US Patent:

20160114883, Apr 28, 2016

Filed:

Oct 23, 2014

Appl. No.:

14/522255

Inventors:

- Huntington Beach CA, US
Peter Aaron Koch - Kent WA, US
Li Chun Chang - Mt. Pleasant SC, US
Robert Hans Thim - Woodinville WA, US

Assignee:

The Boeing Company - Huntington Beach CA

International Classification:

B64C 21/10
B81B 3/00
B81B 7/04
B81B 7/00
B81B 7/02

Abstract:

Active superhydrophobic surface structures are actively-controlled surface structures exhibiting a superhydrophobic state and an ordinary state. Active superhydrophobic surface structures comprise an outer elastomeric covering defining an exposed surface, a controlled group of MEMS (micro-electro-mechanical system) actuators at least covered by the elastomeric covering, and, a controlled region of the exposed surface corresponding to the controlled group. The controlled region has a superhydrophobic state in which the controlled region is textured. The controlled region also has an ordinary state in which the controlled region is smooth (i.e., less textured than in the superhydrophobic state). Active superhydrophobic surface structures may be part of an apparatus that includes a controller and/or one or more sensors. The controller, sensors, and the controlled region may form a feedback loop in which the active superhydrophobic surface is actively controlled.