Patents by Inventor Tiejun Shan

Tiejun Shan 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).

  • Publication number: 20200200896
    Abstract: A system and method of utilizing a LIDAR digital map improves automatic device by allowing a self-driving vehicle to safely make a sharp turn or pass by an environmental obstacle. The system includes at least one passenger vehicle, an automated driving system, and at least one roadside device. Road-condition data is continuously captured with a passenger LIDAR system and a passenger camera device of the passenger vehicle. The road-condition data is compared to LIDAR profiles with an automatic driving system in order to identify a matching profile. A roadside device is pinged if at least one non-line-of-sight condition is detected in the road-condition data. Hidden target data is retrieved from the roadside device to the automated driving system. The automated driving system compiles a set of driving instructions. The set of driving instructions is executed with the passenger vehicle through the automated driving system.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventor: Tiejun Shan
  • Publication number: 20200072971
    Abstract: A method for generating an electromagnetic-profile digital map creates a visual map that includes all obstacles on the road, including road textures, other vehicles, and more. This is achieved by collecting data from specialized deployed vehicles for subsequent processing and compilation. The generated electromagnetic-profile digital map provides three dimensional geographic characteristics of a road, thus enabling automatic driving. The method further utilizes artificial intelligence technology that can improve an autopilot role in automatic driving. Electromagnetic (EM) profiles acquire and analyze data to provide powerful tools for various wireless vehicular communication services. The method utilizes both compiled digital geographical characteristics (location, road futures, including curvature, condition, and more), and surrounding features (3D images, elevations, traffic light location, speed limit, EM propagation profile, and more) to render road conditions.
    Type: Application
    Filed: November 6, 2019
    Publication date: March 5, 2020
    Inventor: Tiejun Shan
  • Publication number: 20200064488
    Abstract: A system and method for vehicle-tracking and localization with a distributed sensor network is provided that includes a plurality of cellular station. A pilot signal is received from the vehicle with an arbitrary station. The pilot signal is compared to each vehicle profile with the arbitrary station in order to identify a matching profile. Spatial positioning data is received for the vehicle with the arbitrary station. The vehicle profile and the spatial positioning data is relayed from the arbitrary station to the at least one proximal station from the plurality of cellular stations. A plurality of iterations is executed. The spatial positioning data is compiled from each iteration into a predicted path for the vehicle with the cellular stations. A warning notification is sent from the arbitrary station of the current iteration to the vehicle, if the predicted path is intersected by at least one hazard.
    Type: Application
    Filed: November 1, 2019
    Publication date: February 27, 2020
    Inventor: Tiejun Shan
  • Publication number: 20190219668
    Abstract: A method for target location approximation using orthogonal frequency-division multiplexing (OFDM) is provided with an OFDM device that consists of a wireless terminal and a multiple-input and multiple-output (MIMO) antenna. In order to derive a location approximation, a pilot uplink signal is transmitted through the wireless terminal towards at least one intended target. The pilot uplink signal that is transmitted is encoded as a direct-sequence spread spectrum (DSSS). Next, a reflected-pilot uplink signal is identified from an ambient signal that returns after the initial transmission. The reflected-pilot uplink signal is decoded to retrieve the original data embedded in the pilot uplink signal. A matching time delay is calculated between the pilot uplink signal and the reflected-pilot uplink signal. A direction of arrival (DOA) is determined from the MIMO antenna. Finally, the matching time delay and the DOA are used for location approximation.
    Type: Application
    Filed: February 8, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190222330
    Abstract: A method for location approximation through time-domain subspace signals and spatial domain subspace signals is provided with an orthogonal frequency-division multiplexing (OFDM)-based wireless device that includes a wireless terminal, a multiple-input and multiple-output (MIMO) antenna, a spatial subspace processor, and a temporal subspace processor. An uplink signal is transmitted from the wireless terminal towards a plurality of targets positioned within an operational range of the MIMO antenna. A plurality of reflected signals generated from the plurality of targets and is received through the MIMO antenna. The plurality of reflected signals is processed at the spatial subspace processor to determine a direction of arrival (DOA) for each of plurality of reflected signals. Each of the plurality of reflected signals is processed by the temporal subspace processor to determine a time delay. The time delay and the DOA are utilized to derive a location approximation for the plurality of targets.
    Type: Application
    Filed: February 14, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190219685
    Abstract: A method of adaptative-array beamforming with a multi-input multi-output (MIMO) automobile radar includes a MIMO radar for transmitting a plurality of initial scanning beams in a radial direction. The plurality of initial scanning beams is transmitted one by one at each direction. Accordingly, the MIMO radar receives a reflected scanning beam, wherein each reflected scanning beam is associated with a corresponding initial scanning beam. The reflected scanning beam is used to detect at least one low-resolution target. Subsequently, the MIMO radar transmits a plurality of initial tracking beams, wherein each initial tracking beams is directed towards a low-resolution target. This results in generation of a corresponding reflected tracking beam for each of the plurality of initial tracking beams. Finally, the MIMO radar detects at least one high-resolution target within each reflected tracking beam.
    Type: Application
    Filed: January 15, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190219666
    Abstract: A method of using a multi-input multi-output (MIMO) antenna array for high-resolution radar imaging and wireless communication for advanced driver assistance systems (ADAS) utilizes a MIMO radar and at least one base station. The MIMO radar establishes wireless communication with the base station via an uplink signal. Likewise, the base station sends a downlink signal to the MIMO radar. Further, unlike conventional vehicle-to-everything (V2X) systems that filter the reflected uplink signal, the MIMO radar uses the reflected uplink signal to detect a plurality of targets. Accordingly, the MIMO radar derives spatial positioning data for each target from the reflected uplink signal.
    Type: Application
    Filed: January 8, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190219686
    Abstract: A method for vehicle location estimation using orthogonal frequency-division multiplexing (OFDM) is provided with an OFDM device that consists of a wireless terminal and a multiple-input and multiple-output (MIMO) antenna. A pilot uplink signal is transmitted towards from the wireless terminal towards the intended target which is within an operational range of the MIMO antenna. Upon contacting the intended target and a plurality of target-surrounding objects, a plurality of return signals is generated to be received by the wireless terminal. A plurality of echo signals that was reflected from the plurality of target-surrounding objects is separated so that a time delay between the pilot uplink signal and the plurality of echo signals can be determined. The time delay along with a direction of arrival determined through the MIMO antenna are used to derive a location approximation for the intended target.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190219667
    Abstract: A method of implementing spread spectrum techniques in an automotive radar with wireless communication capabilities enables an anti-jammer radar capable of overcoming channel noise. The method is provided with a MIMO radar and at least one base station. The MIMO radar transmits the initial uplink signal and receives an ambient signal containing a reflected uplink signal and the downlink signal. The initial uplink signal is encrypted to overcome channel noise and jamming signals. The downlink signal is used to establish wireless communication between the base station and the MIMO radar. As such, the downlink signal is filtered and processed from the ambient signal. Similarly, the reflected downlink signal is also filtered from the ambient signal. Finally, the MIMO radar decrypts the reflected uplink signal to detect a plurality of targets and derive spatial positioning data for each target.
    Type: Application
    Filed: January 16, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190222996
    Abstract: A method of environmental sensing through pilot signals in a spread spectrum wireless communication system is provided with a plurality of wireless terminals. The plurality of wireless terminals includes a plurality of multi-input multi-output (MIMO) radars and at least one base station. The plurality of terminals broadcasts a beacon pilot signals containing a terminal-specific information and encoded with a corresponding identifier. Using the corresponding identifier, an arbitrary radar from the plurality of MIMO radars separates the beacon pilot signal from an ambient signal. More specifically, the arbitrary radar compares the ambient signal to the corresponding identifier of each wireless terminal to identify at least one origin terminal. Subsequently, the arbitrary radar extracts the terminal-specific information from the beacon pilot signal of the origin terminal. The terminal-specific information is used to exchange data between the plurality of wireless terminals for autonomous driving.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 18, 2019
    Inventor: Tiejun Shan
  • Publication number: 20190072659
    Abstract: A radar system to track objects for a vehicle may include a plurality of transmitters to transmit a signal; a plurality of receivers to receive the signal; and an adjustment circuit to adjust the bandwidth of the transmitted signal in accordance with the received signal from the receivers of the radar system.
    Type: Application
    Filed: September 7, 2017
    Publication date: March 7, 2019
    Inventors: RICHARD GU, Tiejun Shan
  • Publication number: 20190033439
    Abstract: The present invention includes an artificial intelligence system for acquiring real-time positioning and geographic data and generates a control signal received by a digital beam forming and steering system for adaptive detection, ranging, and tracking of moving objects for example vehicles. This system is particularly effective in detecting and tracking moving vehicles, obstacles and pedestrians on curved roads and blind spots behind corners of roads.
    Type: Application
    Filed: July 27, 2017
    Publication date: January 31, 2019
    Inventors: RICHARD GU, TIEJUN SHAN
  • Patent number: 7532723
    Abstract: Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: May 12, 2009
    Assignee: InterDigital Technology Corporation
    Inventors: Prabhakar R. Chitrapu, Alain Charles Louis Briancon, Akinlolu Oloruntosi Kumoluyi, Alan Gerald Carlton, Kiran Kumar S. Vanganuru, Richard Dan Herschaft, John Erich Hoffmann, John Thommana, Debashish Purkayastha, Guodong Zhang, Robert Lind Olesen, Alexander Reznik, TieJun Shan, Sung-Hyuk Shin, Amit Singhal
  • Publication number: 20060274641
    Abstract: In a wireless communication system comprising at least one wireless transmit/receive unit (WTRU), a base station, and a radio network controller (RNC), a method for constant envelope orthogonal frequency division multiplexing (CE-OFDM) modulation comprises the WTRU performing an inverse transform on the data. The WTRU next performs constant envelope (CE) modulation on the data and transmits the CE-OFDM data to the base station. The base station receives the data and CE demodulates the data. The base station performs a transform on the demodulated data.
    Type: Application
    Filed: March 31, 2006
    Publication date: December 7, 2006
    Applicant: InterDigital Technology Corporation
    Inventors: Donald Grieco, Sung-Hyuk Shin, Yingming Tsai, Guodong Zhang, Prabhakar Chitrapu, Alain Briancon, Paul Marinier, TieJun Shan, Yogendra Shah
  • Publication number: 20060262874
    Abstract: A method and apparatus for use in a CDMA-type or OFDM/OFDMA-based multi-antenna system first selects an initial set of antenna weights and multiplies the selected antenna weights by copies of a transmission signal to produce a weighted transmission signal. In an OFDM/OFDMA-based implementation, a selected set of sub-carriers are modulated with the signal copies and then weighted using the antenna weights. The weighted transmission signal is transmitted using an initial overall transmission power. If an acknowledgement is not received within a predetermined time interval, the antenna weights are adjusted and/or the sub-carriers are reselected and a modified weighted transmission signal is transmitted. The overall transmission power is maintained at a fixed value as the antenna weights and/or selected sub-carriers are adjusted and is increased only if an acknowledgment is not received after a predetermined number of weight adjustments and/or sub-carrier re-selections.
    Type: Application
    Filed: September 30, 2005
    Publication date: November 23, 2006
    Applicant: InterDigital Technology Corporation
    Inventor: TieJun Shan
  • Publication number: 20050154925
    Abstract: Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.
    Type: Application
    Filed: November 23, 2004
    Publication date: July 14, 2005
    Applicant: InterDigital Technology Corporation
    Inventors: Prabhakar Chitrapu, Alain Briancon, Akinlolu Kumoluyi, Alan Carlton, Kiran Vanganuru, Richard Herschaft, John Hoffmann, John Thommana, Debashish Purkayastha, Guodong Zhang, Robert Olesen, Alexander Reznik, TieJun Shan, Sung-Hyuk Shin, Amit Singhal
  • Patent number: 6496546
    Abstract: A technique for receiving and transmitting wireless telecommunications through use of a generic architecture is disclosed. The present invention mitigates the complexity of different transceiver operations by allowing a generic architecture to be used in a variety of situations with different channels and different telecommunications standards. An illustrative embodiment of the present invention comprises: receiving uplink analog RF signals at a base station; converting the uplink analog wide-band RF signals into IF uplink digital signals at an analog-to-digital converter; converting the IF uplink digital signals into a number of uplink channels; and demodulating selected narrow-band uplink channels from the total number of narrow-band uplink channels.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: December 17, 2002
    Assignee: Lucent Technologies Inc.
    Inventors: Stephen Alan Allpress, Sridhar Arunachalam, Reza Mardani, Carmine James Pagano, II, Joseph Anthony Tarallo, Tiejun Shan