Patents by Inventor Steve K Chen
Steve K Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11914539Abstract: An input switching circuit dynamically connects, based on an input mapping table, input streams to inputs of a wavefront pre-transform circuit. An output switching circuit dynamically connects, based on an output mapping table, output data at outputs of the wavefront pre-transform circuit to transport streams. A controller controls, based on a wiping command, at least one of the input and output switching circuits to alter at least one of the input and output mapping tables such that the at least one of the input and output switching circuits is disabled for connection. A first subset of the transport streams operates in a foreground mode available to a user and is transported for storage in remote storage sites at a network and a second subset of the transport streams operates in a background mode available to an administrator and is not transported for storage in the remote storage sites.Type: GrantFiled: March 6, 2023Date of Patent: February 27, 2024Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Juo-Yu Lee, Donald C. D. Chang, Steve K. Chen
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Patent number: 11887575Abstract: A system for generating and injecting acoustic interference signals to mitigate undesired acoustic noise over a target zone. M pickup sensors pick up acoustic noise signals from one or more noise sources in real time and generate M noise signals, M>1. A beam forming network includes M acoustic beam forming modules to process the M noise signals respectively and generate N acoustic interference signals. N acoustic injectors condition, amplify and inject the N acoustic interference signals over the target zone, N>1. Each of the M acoustic beam forming modules includes a 1-to-N distribution network to transform a respective one of the M noise signals into N signals, and N finite-impulse-response filters to perform amplitude and phase weighting on the respective N signals and generate N intermediate signals which are combined respectively with corresponding intermediate signals generated by remaining M?1 acoustic beam forming modules to generate the N acoustic interference signals.Type: GrantFiled: June 12, 2018Date of Patent: January 30, 2024Inventors: Donald C. D. Chang, Steve K. Chen
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Patent number: 11782945Abstract: An apparatus includes N audio receivers positioned in a pre-defined geometry with respect to P audio sources to receive P audio signals from the P audio sources; N data sets coupled to the N audio receivers to sample the received P audio signals into N data streams; a plurality of storage devices coupled to the N data sets to store the N data streams; and a post processor coupled to the plurality of storage devices to generate output signals corresponding to reconstituted P audio signals using a wavefront demultiplexing transformation, wherein N and P are positive integers and N?P. The post processor has inputs receiving data retrieved from the plurality of storage devices and outputs providing the output signals.Type: GrantFiled: December 11, 2018Date of Patent: October 10, 2023Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Juo-Yu Lee, Steve K Chen
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Patent number: 11770181Abstract: A source terminal, for communications with a destination terminal via satellite links to two clusters of satellites, comprises a transmitter and a multibeam antenna system. The transmitter includes a preprocessor and a bank of modulators. The preprocessor performs a K-muxing transform, which has an inverse transform, on M concurrent input data streams to generate concurrently M output data streams, M>1. Each output data stream is a linear combination of the M concurrent input data streams. The bank of modulators transforms N of the M output data streams into N signal streams, N?M. The multibeam antenna system transforms the N signal streams into N shaped beams and radiating N1 of the N shaped beams towards the first cluster of satellites and N2 of the N shaped beams towards the second cluster of satellites, where N1 and N2 are positive integers and N1+N2=N.Type: GrantFiled: June 30, 2022Date of Patent: September 26, 2023Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Steve K. Chen
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Publication number: 20230229613Abstract: An input switching circuit dynamically connects, based on an input mapping table, input streams to inputs of a wavefront pre-transform circuit. An output switching circuit dynamically connects, based on an output mapping table, output data at outputs of the wavefront pre-transform circuit to transport streams. A controller controls, based on a wiping command, at least one of the input and output switching circuits to alter at least one of the input and output mapping tables such that the at least one of the input and output switching circuits is disabled for connection. A first subset of the transport streams operates in a foreground mode available to a user and is transported for storage in remote storage sites at a network and a second subset of the transport streams operates in a background mode available to an administrator and is not transported for storage in the remote storage sites.Type: ApplicationFiled: March 6, 2023Publication date: July 20, 2023Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Juo-Yu Lee, Donald C.D. Chang, Steve K. Chen
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Patent number: 11677725Abstract: A communications system between a source and a destination includes a transmitter at the source and a communication connectivity. The transmitter comprises a preprocessor and a candidate envelope folder to provide M known a priori digital envelopes, M?1. The preprocessor has N input ports and N output ports, N>M, performs at least one wavefront multiplexing (WFM) transform on N inputs received at the N input ports to generate N outputs at the N output ports. The preprocessor performs the at least one WFM transform by calculating, for each of the N outputs, a linear combination of the N inputs using one of the M digital envelopes such that a digital format of one of the N outputs appears to human sensors as having features substantially identical to a digital format of the one of the M digital envelopes.Type: GrantFiled: June 24, 2019Date of Patent: June 13, 2023Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Juo-Yu Lee, Steve K. Chen
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Publication number: 20230145659Abstract: A communication system comprises a remote digital beam-forming network configured to receive a set of input signals destined for a set of user devices and generate element signals to be radiated by a set of remote antenna array elements; a pre-processor coupled to the remote digital beam-forming network, configured to perform a wavefront multiplexing transform on signal waveforms including the element signals and generate wavefront multiplexed signals; an optical line terminal coupled to the pre-processor, configured to process the wavefront multiplexed signal streams to generate optical waveform streams; and optical fibers coupling the optical line terminal to a set of optical network units.Type: ApplicationFiled: January 9, 2023Publication date: May 11, 2023Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C.D. Chang, Juo-Yu Lee, Steve K. Chen
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Patent number: 11599492Abstract: An input switching circuit dynamically connects, based on an input mapping table, input streams to inputs of a wavefront pre-transform circuit. An output switching circuit dynamically connects, based on an output mapping table, output data at outputs of the wavefront pre-transform circuit to transport streams. A controller controls, based on a wiping command, at least one of the input and output switching circuits to alter at least one of the input and output mapping tables such that the at least one of the input and output switching circuits is disabled for connection. A first subset of the transport streams operates in a foreground mode available to a user and is transported for storage in remote storage sites at a network and a second subset of the transport streams operates in a background mode available to an administrator and is not transported for storage in the remote storage sites.Type: GrantFiled: November 6, 2018Date of Patent: March 7, 2023Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Juo-Yu Lee, Donald C. D. Chang, Steve K. Chen
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Patent number: 11552699Abstract: A MIMO basestation for a cellular communications system comprises a remote indoor processing facility coupled to an outdoor RF tower via optical fibers. The remote indoor processing facility includes a bank of RF modulators to modulate signal streams; a remote MIMO transmitting processor that includes a remote digital beam-forming network to transform the modulated signal streams into transmit beam signals; a pre-processor to perform a wavefront multiplexing transform on the transmit beam signals to generate wavefront multiplexed beam signals, each of the wavefront multiplexed beam signals being a linear combination of the transmit beam signals; and RF-to-optical drivers to perform optical modulating functions on the wavefront multiplexed beam signals to generate optical waveform streams.Type: GrantFiled: November 18, 2019Date of Patent: January 10, 2023Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C.D. Chang, Juo-Yu Lee, Steve K. Chen
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Publication number: 20220337312Abstract: A source terminal, for communications with a destination terminal via satellite links to two clusters of satellites, comprises a transmitter and a multibeam antenna system. The transmitter includes a preprocessor and a bank of modulators. The preprocessor performs a K-muxing transform, which has an inverse transform, on M concurrent input data streams to generate concurrently M output data streams, M>1. Each output data stream is a linear combination of the M concurrent input data streams. The bank of modulators transforms N of the M output data streams into N signal streams, N?M. The multibeam antenna system transforms the N signal streams into N shaped beams and radiating N1 of the N shaped beams towards the first cluster of satellites and N2 of the N shaped beams towards the second cluster of satellites, where N1 and N2 are positive integers and N1+N2=N.Type: ApplicationFiled: June 30, 2022Publication date: October 20, 2022Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Steve K. Chen
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Patent number: 11381302Abstract: A source terminal for communications with a destination terminal, both located near or on earth surface, via satellite links to a cluster of satellites in corresponding slightly inclined Geostationary Satellite Orbits (GSOs). The source terminal comprises a transmitter which includes a preprocessor to perform a K-muxing transform on M concurrent input data streams to generate concurrently M output data streams, M>1, each of the M output data streams being a linear combination of the M concurrent input data streams, the K-muxing transform having an inverse transform; a bank of modulators to transform the M output data streams into N signal streams destined for the destination terminal, N?M; and a multibeam antenna system to dynamically track and communicate with the cluster of satellites. The multibeam antenna system transforms the N signal streams into shaped beams and radiates the shaped beams towards the cluster of satellites.Type: GrantFiled: April 28, 2021Date of Patent: July 5, 2022Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Steve K. Chen
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Patent number: 10902138Abstract: One embodiment provides a storage management system. During operation, the system identifies a data file of a user. The system obtains an encrypted client registry from a primary cloud provider in a plurality of cloud providers that provide cloud storage to the user and retrieves a key associated with a device of the user by decrypting the encrypted client registry using a hash of a password associated with the user. The system obtains credentials of the plurality of cloud providers by decrypting a locally stored cloud configuration using the key and generates a plurality of coded fragments from the data file based on a generator matrix of erasure encoding. The number of coded fragments is determined based on a number of the cloud providers associated with the user. The system selects a respective coded fragment for uploading to a corresponding cloud provider in the plurality of cloud providers.Type: GrantFiled: March 23, 2017Date of Patent: January 26, 2021Assignee: PhazrlO Inc.Inventors: Chi-Kwan J. Cheung, Donald C. D. Chang, Juo-Yu Lee, Steve K. Chen, Tzer-Hso Lin
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Publication number: 20200091997Abstract: A MIMO basestation for a cellular communications system comprises a remote indoor processing facility coupled to an outdoor RF tower via optical fibers. The remote indoor processing facility includes a bank of RF modulators to modulate signal streams; a remote MIMO transmitting processor that includes a remote digital beam-forming network to transform the modulated signal streams into transmit beam signals; a pre-processor to perform a wavefront multiplexing transform on the transmit beam signals to generate wavefront multiplexed beam signals, each of the wavefront multiplexed beam signals being a linear combination of the transmit beam signals; and RF-to-optical drivers to perform optical modulating functions on the wavefront multiplexed beam signals to generate optical waveform streams.Type: ApplicationFiled: November 18, 2019Publication date: March 19, 2020Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C.D. Chang, Juo-Yu Lee, Steve K. Chen
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Publication number: 20200043574Abstract: Verification systems for testing food products or other samples may include a mobile analytical device, a mobile accessory device such as a smart phone, and a remote, e.g., cloud-based, computing system. The mobile analytical device is adapted to generate a sensor output that is indicative of a molecular composition of the sample. The mobile accessory device may be adapted to receive the sensor output from the mobile analytical device. The remote computing system may be adapted to analyze analytical data using artificial intelligence (AI) and/or machine learning (M-L) to make an authentication determination of the sensor output relative to a predefined product database. The mobile accessory device may be adapted to upload the sensor output to the remote computing system by a communication network, and the remote computing system may be adapted to download the authentication determination to the mobile accessory device by the same communication network.Type: ApplicationFiled: September 25, 2019Publication date: February 6, 2020Applicant: Oak Analytics Inc.Inventors: Deepak Mehrotra, Steve K. Chen
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Patent number: 10516872Abstract: An apparatus includes a memory storing a digital envelope and a wavefront demultiplexing (WFD) device which receives M input streams concurrently, M being an integer greater than 1, performs a WFD transformation on the M input streams, and generates M output streams concurrently. A first input stream includes wavefront multiplexed digital identifiers for digital right management. A second input stream is the digital envelope. The first input stream presented in a digital format appears to human perception as having identical features to the digital envelope presented in the digital format. Each output stream is a linear combination of the M input streams such that the digital identifiers are recovered from at least one of the M output streams. The digital envelope is a data file used by a sender to send the M input streams and is scaled with a magnification factor greater than 1 in the WFD transformation.Type: GrantFiled: May 13, 2019Date of Patent: December 24, 2019Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Juo-Yu Lee, Jeffrey C. Chang, Steve K. Chen
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Patent number: 10506111Abstract: An apparatus comprises a segmenter and a pre-processor. The segmenter segments a first stream of data into P-1 substreams, P being an integer greater than 1. The pre-processor, having N input ports, N being an integer greater than P-1, receives the P-1 substreams at P-1 ports of the N input ports and a second stream at a Pth input port. The pre-processor generates P output streams from the P-1 substreams and the second stream using a P-to-P K-muxing operation. The P output streams are uploaded to a cloud storage via a network. Redundancy of the P output streams recovered by a user from the cloud storage is based on whether the second stream is accessible to the user.Type: GrantFiled: December 18, 2017Date of Patent: December 10, 2019Inventors: Donald C. D. Chang, Juo-Yu Lee, Steve K. Chen
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Patent number: 10484081Abstract: A receiving terminal for communication via NGSO satellites comprises an outdoor unit coupled to an indoor unit via optical fibers. The outdoor unit comprises an array antenna for capturing signals from the satellites; low-noise amplifiers; analog-to-digital conversion blocks for converting the captured signals to digital signals; a pre-processor for performing a wavefront multiplexing transform on the digital signals and generating wavefront multiplexed signals; and RF-to-optical drivers for transforming the wavefront multiplexed signals to optical waveforms.Type: GrantFiled: January 9, 2018Date of Patent: November 19, 2019Assignee: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C. D. Chang, Juo-Yu Lee, Steve K. Chen
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Publication number: 20190312847Abstract: A communications system between a source and a destination includes a transmitter at the source and a communication connectivity. The transmitter comprises a preprocessor and a candidate envelope folder to provide M known a priori digital envelopes, M?1. The preprocessor has N input ports and N output ports, N>M, performs at least one wavefront multiplexing (WFM) transform on N inputs received at the N input ports to generate N outputs at the N output ports. The preprocessor performs the at least one WFM transform by calculating, for each of the N outputs, a linear combination of the N inputs using one of the M digital envelopes such that a digital format of one of the N outputs appears to human sensors as having features substantially identical to a digital format of the one of the M digital envelopes.Type: ApplicationFiled: June 24, 2019Publication date: October 10, 2019Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C.D. Chang, Juo-Yu Lee, Steve K. Chen
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Publication number: 20190293564Abstract: Verification systems for testing food products or other samples include a mobile analytical device, a mobile accessory device such as a smart phone, and a remote, e.g., cloud-based, computing system. The mobile analytical device is adapted to generate a sensor output that is characteristic of the sample. The mobile accessory device may be adapted to receive the sensor output from the mobile analytical device. The remote computing system may be adapted to analyze analytical data using artificial intelligence (AI) and/or machine learning (M-L) to make an authentication determination of the sensor output relative to a. predefined product database. The mobile accessory device may be adapted to upload the sensor output to the remote computing system by a communication network, and the remote computing system may be adapted to download the authentication determination to the mobile accessory device by the communication network.Type: ApplicationFiled: March 22, 2019Publication date: September 26, 2019Applicant: Oak Analytics Inc.Inventors: Deepak Mehrotra, Steve K. Chen
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Publication number: 20190266340Abstract: An apparatus includes a memory storing a digital envelope and a wavefront demultiplexing (WFD) device which receives M input streams concurrently, M being an integer greater than 1, performs a WFD transformation on the M input streams, and generates M output streams concurrently. A first input stream includes wavefront multiplexed digital identifiers for digital right management. A second input stream is the digital envelope. The first input stream presented in a digital format appears to human perception as having identical features to the digital envelope presented in the digital format. Each output stream is a linear combination of the M input streams such that the digital identifiers are recovered from at least one of the M output streams. The digital envelope is a data file used by a sender to send the M input streams and is scaled with a magnification factor greater than 1 in the WFD transformation.Type: ApplicationFiled: May 13, 2019Publication date: August 29, 2019Applicant: SPATIAL DIGITAL SYSTEMS, INC.Inventors: Donald C.D. Chang, Juo-Yu Lee, Jeffrey C. Chang, Steve K. Chen