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公开(公告)号：US11599492B1
公开(公告)日：2023-03-07
申请号：US16181361
申请日：2018-11-06
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Juo-Yu Lee , Donald C. D. Chang , Steve K. Chen
Abstract: 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.
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公开(公告)号：US10911121B2
公开(公告)日：2021-02-02
申请号：US16121595
申请日：2018-09-04
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C. D. Chang , Juo-Yu Lee
IPC: H04B7/06 , H04L5/00 , H04B7/0413 , H04B7/0456
Abstract: A communication system includes a transmitter and remote receivers having each a set of receive elements. The transmitter includes a preprocessor and a set of transmit elements which radiate shaped beams including probing signals through a multipath communication channel. The preprocessor computes channel state information based on received responses to the probing signals, generate composited transfer functions based on the channel state information, generate the shaped beams based on the composited transfer functions, and process a plurality of input signals to be transmitted via the shaped beams to the remote receivers. The channel state information includes transfer functions, each characterizing at least one propagation path from one transmit element to one receive element. Each composited transfer function is a linear combination of the transfer functions. Each receive element is identified by a user element identification index in the transfer functions. Each remote receiver is identified by a user identification index.
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公开(公告)号：US20180048371A1
公开(公告)日：2018-02-15
申请号：US15724152
申请日：2017-10-03
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C.D. Chang , Juo-Yu Lee
CPC classification number: H04B7/0626 , H04B7/0413 , H04B7/0456 , H04L5/0048
Abstract: A communication system includes a transmitter, one or more active scattering platforms, and one or more remote receivers. The transmitter includes a beam forming network for transforming M signals into a set of shaped beams which are radiated toward the active scattering platforms by transmitter antenna elements. The active scattering platforms receive and re-radiate one or more of the radiated shaped beams toward the receivers. The beam forming network optimizes composite transfer functions under performance constraints. Each composite transfer function is a linear combination of transfer functions. Each transfer function characterizes propagation paths from one transmitter antenna element to one receiving antenna element. Each receiving antenna element is identified by a user element identification index in the transfer functions. Each receiver is identified by a user identification index. The performance constraints are specified for locations identified by the user identification indices or the user element identification indices.
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公开(公告)号：US10904334B1
公开(公告)日：2021-01-26
申请号：US15873892
申请日：2018-01-17
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C. D. Chang , Juo-Yu Lee
Abstract: For data writing, a first input device performs a first wavefront multiplexing transform on a first input stream and a first probing stream to generate L first intermediate streams. An en-route processing device generates J output streams from the stored L first intermediate streams and at least a second probing stream. For data reading, an en-route processing device generates L first intermediate streams and at least a first recovered probing stream from J input streams including a first stored probing stream. The L first intermediate streams are stored in a first storage site. A first output device performs a first wavefront demultiplexing transform on the L first intermediate streams to generate a first output stream and a second recovered probing stream. The J input streams are stored in a distributed storage structure having at least a second storage site that stores P of the J input streams.
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5.发明申请公开(公告)号：US20200091997A1
公开(公告)日：2020-03-19
申请号：US16687685
申请日：2019-11-18
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C.D. Chang , Juo-Yu Lee , Steve K. Chen
IPC: H04B7/185 , H04W52/42 , H04L27/26 , H04N7/20 , H04B7/204 , H04B10/2575 , H04B7/06 , H04B7/0452
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20170324506A1
公开(公告)日：2017-11-09
申请号：US15633752
申请日：2017-06-26
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Juo-Yu Lee , Donald C.D. Chang , Tzer-Hso Lin
CPC classification number: H04J14/06 , H01Q21/245 , H04B7/18504 , H04B7/18513
Abstract: An apparatus comprises a wavefront muxing processor receiving first and second input signals to generate first and second output signals on first and second communication channels, respectively, the first and second output signals being at a common frequency slot and having relative differential amplitude and phase delays; and an amplitude and phase adjustment element located at one of the first and second communication channels to adjust the relative differential amplitude and phase delays using an adjustment amount to reduce interference in the first and second communication channels. The first output signal is a weighted sum of the first input signal and the second input signal that is phase shifted by a second phase shift. The second output signal is a weighted sum of the second input signal and the first input signal that is phase shifted by a first phase shift. The two output signals are transmitted to a transponder.
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公开(公告)号：US20160048697A1
公开(公告)日：2016-02-18
申请号：US14685651
申请日：2015-04-14
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C.D. Chang , Juo-Yu Lee , Steve K Chen , Jeffrey Chijieh Chang
CPC classification number: G06F21/6209 , G06F21/6245 , H04L65/4076 , H04L65/4084 , H04L65/602 , H04L65/604 , H04L65/605 , H04L65/607
Abstract: Data photo files with digital envelops may be used for many new applications for cloud computing. The new applications include games and entertainments featuring additional privacy and survivability on data storage and transport on cloud computing. Wavefront multiplexing/demultiplexing process (WF muxing/demuxing) embodying an architecture that utilizes multi-dimensional waveforms has found applications in data storage and transport on cloud. Multiple data sets are preprocessed by WF muxing before stored/transported. WF muxed data is aggregated data from multiple data sets that have been “customized processed” and disassembled into any scalable number of sets of processed data, with each set being stored on a storage site. The original data is reassembled via WF demuxing after retrieving a lesser but scalable number of WF muxed data sets. A customized set of WF muxing on multiple digital files as inputs including at least a data message file and a selected digital envelop file, is configured to guarantee at least one of the multiple outputs comprising a weighted sum of all inputs with an appearance to human natural sensors substantially identical to the appearance of the selected digital envelop in a same image, video or audio format. The output file is a file with enveloped or embedded messages. The embedded message may be reconstituted by a corresponding WF demuxing processor at destination with the known a priori information of the original digital envelope. In short, digital enveloping/de-enveloping can be implemented via WF muxing and demuxing formulations. WF muxed data featured enhanced privacy and redundancy in data transport and storage on cloud. On the other hand, data enveloping is an application in an opposite direction for WF muxing applications as far as redundancy is concerned. Enveloped data are intended only for limited receivers who has access to associated digital envelope data files with enhanced privacy for no or minimized redundancy.
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公开(公告)号：US11831363B2
公开(公告)日：2023-11-28
申请号：US16150219
申请日：2018-10-02
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C. D. Chang , Juo-Yu Lee
IPC: H04B7/0413 , H04B7/06 , H04B17/30 , H04B17/391 , H04B17/10
CPC classification number: H04B7/0413 , H04B7/0626 , H04B17/30 , H04B17/391 , H04B17/102
Abstract: A communications system includes at least one receiver having receiving elements and a transmitter having transmitting elements to transmit signals to the receiving elements via wireless propagation channels. The transmitter includes a beam-forming network and a channel measurement unit. The beam-forming network receives input signal streams at its input ports and outputs one or more signals as shaped beams based on a set of composited transfer functions. The channel measurement unit performs measurements of components of channel status information to generate a set of point-to-point transfer functions and generates the composited transfer functions by computing linear combinations of the point-to-point transfer functions. Each of the point-to-point transfer functions characterizes propagation paths from one of the transmitting elements to one of the receiving elements. The composited transfer functions are point-to-multipoint transfer functions characterizing propagation paths from the input ports of the beam-forming network to one or more of the receiving elements.
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公开(公告)号：US20190020397A1
公开(公告)日：2019-01-17
申请号：US16121595
申请日：2018-09-04
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C.D. Chang , Juo-Yu Lee
IPC: H04B7/06 , H04B7/0413
Abstract: A communication system includes a transmitter and remote receivers having each a set of receive elements. The transmitter includes a preprocessor and a set of transmit elements which radiate shaped beams including probing signals through a multipath communication channel. The preprocessor computes channel state information based on received responses to the probing signals, generate composited transfer functions based on the channel state information, generate the shaped beams based on the composited transfer functions, and process a plurality of input signals to be transmitted via the shaped beams to the remote receivers. The channel state information includes transfer functions, each characterizing at least one propagation path from one transmit element to one receive element. Each composited transfer function is a linear combination of the transfer functions. Each receive element is identified by a user element identification index in the transfer functions. Each remote receiver is identified by a user identification index.
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公开(公告)号：US10069553B2
公开(公告)日：2018-09-04
申请号：US15724152
申请日：2017-10-03
Applicant: SPATIAL DIGITAL SYSTEMS, INC.
Inventor： Donald C. D. Chang , Juo-Yu Lee
IPC: H04B7/06 , H04B7/0413 , H04L5/00 , H04B7/0456
Abstract: A communication system includes a transmitter, one or more active scattering platforms, and one or more remote receivers. The transmitter includes a beam forming network for transforming M signals into a set of shaped beams which are radiated toward the active scattering platforms by transmitter antenna elements. The active scattering platforms receive and re-radiate one or more of the radiated shaped beams toward the receivers. The beam forming network optimizes composite transfer functions under performance constraints. Each composite transfer function is a linear combination of transfer functions. Each transfer function characterizes propagation paths from one transmitter antenna element to one receiving antenna element. Each receiving antenna element is identified by a user element identification index in the transfer functions. Each receiver is identified by a user identification index. The performance constraints are specified for locations identified by the user identification indices or the user element identification indices.
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