Steve H Chen

US Patent:

6400759, Jun 4, 2002

Filed:

Jun 30, 1997

Appl. No.:

08/884956

Inventors:

Young Way Liu - La Mirada CA
Steve Chen - San Jose CA

Assignee:

Integrated Telecom Express, Inc. - San Jose CA

International Classification:

H04B 138

US Classification:

375222

Abstract:

A device or interface driver is provided for permitting an operating system to utilize, configure and control a software modem having forward compatible and expandable functionality. In a preferred embodiment, the operating system is a Windows based system running on a host processing system such as a personal computer, and the modem is compatible with standards promulgated for ADSL. Conventional voice band modem control commands are also supported, so that the present invention for ADSL based modems is nevertheless compatible with existing modem applications programs. The new driver manages control information for configuring the bandwidth to be used in a data link established through a channel with an upstream transciever during an initialization process, and serves as a data pump for the software modem. The control information may be self-determined by a user of the host processing system or alternatively, automatically sensed, configured and monitored by such processing system.

US Patent:

6452809, Sep 17, 2002

Filed:

Nov 10, 2000

Appl. No.:

09/709820

Inventors:

Russell A. Jackson - Calabasas CA
Steve S. Chen - San Jose CA
Philip S. Smith - Monterey CA

Assignee:

Galactic Computing Corporation

International Classification:

H05K 700

US Classification:

361796, 361724, 361730, 361752, 361753, 361797, 439 61

Abstract:

A scalable Internet engine is comprised of a large number of commercially available server boards each arranged as an engine blade in a power and space efficient cabinet. The engine blades are removably positioned in a front side of the cabinet in a vertical orientation. A through plane in the middle of a chassis assembly within the cabinet provides common power and control peripheral signals to all engine blades. I/O signals for each engine blade are routed through apertures in the through plane to interface cards positioned in the rear of the cabinet. The scalable engine can accommodate different types of server boards in the same chassis assembly because of a common blade carrier structure. Different types of commercially available motherboards are mounted in the common blade carrier structure that provides a uniform mechanical interface to the chassis assembly. A specially designed PCI host board that can plug into various types of motherboards has a first connector for connecting to the through plane and second connector for connecting to the interface cards.

US Patent:

6606253, Aug 12, 2003

Filed:

Sep 16, 2002

Appl. No.:

10/244450

Inventors:

Russell A. Jackson - Calabasas CA
Steve S. Chen - San Jose CA
Philip S. Smith - Monterey CA

Assignee:

Galactic Computing Corporation

International Classification:

H05K 700

US Classification:

361796, 361724, 361730, 361752, 361753, 361797, 439 61

Abstract:

A scalable Internet engine is comprised of a large number of commercially available server boards each arranged as an engine blade in a power and space efficient cabinet. The engine blades are removably positioned in a front side of the cabinet in a vertical orientation. A through-plane in the middle of a chassis assembly within the cabinet provides common power and control peripheral signals to all engine blades. I/O signals for each engine blade are routed through apertures in the through-plane to interface cards positioned in the rear of the cabinet. The scalable engine can accommodate different types of server boards in the same chassis assembly because of a common blade carrier structure. Different types of commercially available motherboards are mounted in the common blade carrier structure that provides a uniform mechanical interface to the chassis assembly. A specially designed PCI host board that can plug into various types of motherboards has a first connector for connecting to the through plane and second connector for connecting to the interface cards.

US Patent:

20010007574, Jul 12, 2001

Filed:

Dec 19, 2000

Appl. No.:

09/741748

Inventors:

Young Liu - La Mirada CA, US
Steve Chen - San Jose CA, US

International Classification:

H04B001/38

US Classification:

375/219000, 375/222000

Abstract:

A high speed communications system is provided which uses a selectable, desirable portion of the total available bandwidth of a transmission channel. In a preferred embodiment, the invention is an ADSL compatible modem which selects a sub-set of the available downstream DMT sub-channels based on an evaluation of such sub-channels by appropriate signal processing circuitry. An analog front end (AFE) contains sub-band filtering causes an upstream transceiver to use only this selected number of available sub-channels for downstream data transmission. This reduces hardware costs and complexity while still preserving compatibility with applicable ADSL standards and providing a high speed data link. The target data rate of the modem can be further enhanced to the point of achieving fill protocol capability by increasing or upgrading the AFEs, and/or the signal processing circuitry in order to increase the number of processable transmitted downstream sub-channels.

US Patent:

20110197740, Aug 18, 2011

Filed:

Aug 2, 2010

Appl. No.:

12/848953

Inventors:

Donald C.D. Chang - Thousand Oaks CA, US
Steve Chen - Pacific Palisades CA, US

International Classification:

G10H 1/36
H04J 3/00

US Classification:

84610, 370464

Abstract:

An advanced channel storage and retrieving system is achieved that is capable of simultaneously transporting multiple-stream data concurrently, with encryptions and error detection and limited correction capability using wavefront (WF) multiplexing (muxing) at the pre-processing and WF demultiplexing (de-muxing) in the post-processing. The WF muxing and demuxing processing can be applied for multiple signal streams with similar contents and format such as cable TV delivery systems or multiple signal streams with very distinct contents and format such as Karaoke multimedia systems. The stored or transported data are preprocessed by a WF muxing processor and are in the formats of multiple sub-channels. Signals in each sub-channel are results of unique linear combination of all the input signals streams. Conversely, an input signal stream is replicated and appears on all the sub-channels. Furthermore the replicated streams in various sub-channels are “linked” together by a unique phase weighting vector, which is called “wavefront” or WF. Various input signal streams will feature different WFs among their replicated signal streams in the sub-channels. The WF muxing processing is capable to generating a set of orthogonal WFs, and the WF demuxing processing is capable of reconstituting the input signal streams based on the retrieved sub-channel data only if the orthogonal characteristics of a set of WFs are preserved. Without the orthogonality among the WF, the signals in sub-channels are mixed and become effectively pseudo random noise. Therefore, an electronic locking mechanism in the preprocessing is implemented to make the WFs un-orthogonal among one another. Similarly, an electronic un-locking mechanism in the post-processing is implemented to restore the orthogonal characteristics among various WFs embedded in the sub-channel signals. Some of the phenomena due to the selected locking mechanisms are reproducible in nature, such as wave propagating effects, and other are distinctively man-made; such as switching sub-channel sequences. There are other conventional encryption techniques using public and private keys which can be applied in conjunction with the WF muxing and de-muxing processor, converting plain data streams into ciphered data streams which can be decoded back into the original plain data streams. An encryption algorithm along with a key is used in the encryption and decryption of data. As to the optional parallel to serial and serial to parallel conversions in the pre and post processing, respectively, we assume that transmissions with single carrier are more efficient than those with multiple carriers. We also assume single channel recording is more cost effective than multiple channel recording. However, there are occasions that continuous spectrum is hard to come-by. We may use fragmented spectrum for transmissions. There are techniques to convert wideband waveforms using continuous spectra into multiple fragmented sub-channels distributed on non-continuous frequency slots. Under these conditions we may replace the parallel to serial conversion processing by a frequency mapping processor.

US Patent:

20120057716, Mar 8, 2012

Filed:

Jan 18, 2011

Appl. No.:

13/008833

Inventors:

Donald C. D. Chang - Thousand Oaks CA, US
Steve Chen - Pacific Palisades CA, US

International Classification:

G10K 11/16

US Classification:

381 711

Abstract:

A quiet zone generation technique for acoustic/audio signals is proposed for mitigation of selected noise or interferences over limited areas in free space by injecting the very acoustic noise, interference, or audio feedback signals via iterative processing, generating quiet zones dynamically. This creates undesired noise-free quiet zones. Optimization loops operating iteratively to electronically process cancellation signals consist of three interconnected functional blocks: (1) an acoustic injection array, consisting of pick-up arrays to obtain the interference signals, beam forming networks for element weighting and/or re-positioning, and array elements for noise injections, (2) a diagnostic network with strategically located probes, and (3) an optimization processor with cost minimization algorithms to calculate element weights for updating.

US Patent:

20120058729, Mar 8, 2012

Filed:

Sep 2, 2010

Appl. No.:

12/874437

Inventors:

DONALD C. D. CHANG - THOUSAND OAKS CA, US
MICHAEL T. H. LIN - CHATSWORTH CA, US
STEVE CHEN - PACIFIC PALISADES CA, US

International Classification:

H04B 15/00

US Classification:

455 631

Abstract:

A quiet zone generation technique is proposed for interference mitigation for a receive antenna by injecting the very interference signals via iterative processing, generating quiet zones dynamically for receive (RCV) antennas. The receive antenna may feature multiple receiving apertures distributed over a finite area. Optimization loops consist of four cascaded functional blocks; (1) a pick-up array to obtain the interference signals, (2) element weighting and/or repositioning processors, (3) an auxiliary transmit (XMIT) array with optimized element positions, (4) a diagnostic network with strategically located probes, and (5) an optimization processor with cost minimization algorithms.To minimize interferences between transmit (Tx) and receiving (Rx) apertures in limited space of an antenna farm for communications and/or radar applications are very tough problems. Among the tools for solving the problems are many conventional techniques listed in the references [1,2,3]. However, solutions for co-site interference mitigation may not be generic ones but more specific to geometries of antenna farms, Tx apertures and Rx antenna locations, and beam positions of the Tx beams.

US Patent:

20130333544, Dec 19, 2013

Filed:

Jul 10, 2013

Appl. No.:

13/938268

Inventors:

Steve K Chen - Pacific Palisades CA, US
Donald C.D. Chang - Camarillo CA, US

International Classification:

G10H 1/36

US Classification:

84610, 700 94

Abstract:

A concurrent multi-channel data process is presented to utilize wavefront multiplexing for data storage and data stream transport in a distribution network, with additional applications for multi-media recording and data communications via transponding satellites. Multiple concurrent data streams are pre-processed by a wavefront multiplexer into multiple sub-channels or wavefront components, where signals from respective data streams are replicated into sub-channels. These replicated data streams are linked via a unique phase weighting vector, or “wave-front”, which are also linked by various spatially orthogonal wavefronts. Additionally, probing signals are embedded and linked via some of the orthogonal wavefronts. Aggregated signals in sub-channels are unique linear combinations of all input data streams. Post-processing via a wavefront de-multiplexer converts various sub-channel signals back to the original data streams, utilizing the embedded probing signals to restore orthogonality among multiple wavefronts.