Patents by Inventor Zhigang Xu

Zhigang Xu 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: 20140302809
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the relative frequency location of the interference is detected. The relative frequency location specifies whether the frequency of the interference is high side (above the desired signal, i.e., at a higher frequency) or low side (below the desired signal). The receiver is configured based on the detected interference and relative location thereof. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Applicant: Spreadtrum Communications USA Inc.
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Patent number: 8787507
    Abstract: A novel receiver architecture optimizes receiver performance in the presence of interference. In various embodiments, power estimation circuits are used with variable selectivity to determine the exact nature of the interference and to optimize the performance correspondingly. The variable selectivity is achieved using stages of filtering with progressively narrower bandwidths. Also, the actual method of optimizing the receiver performance is novel compared to the prior art in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: July 22, 2014
    Assignee: Spreadtrum Communications USA
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Patent number: 8761702
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the relative frequency location of the interference is detected. The relative frequency location specifies whether the frequency of the interference is high side (above the desired signal, i.e., at a higher frequency) or low side (below the desired signal). The receiver is configured based on the detected interference and relative location thereof. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: June 24, 2014
    Assignee: Spreadtrum Communications USA Inc.
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Publication number: 20140155060
    Abstract: In a signal processing method, an input signal is provided at an input to a receiver. A bandwidth of the receiver is controlled to a predetermined wideband setting. For band in a plurality of frequency bands, the input signal is processed at the receiver with a mixer, an amplifier, and a filter, to generate a first processed signal, and a power spectral density of the processed signal is generated over that frequency band, to provide a frequency domain signal for that frequency band. Based on the frequency domain signals corresponding to each frequency band in the plurality of frequency bands, a frequency domain representation of the processed signal is reconstructed over a reconstruction band having a bandwidth larger than the predetermined wideband setting. Based on the reconstructed frequency domain representation, a spectral component is identified corresponding to at least one cellular telephony access mode.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Inventors: David Haub, Zhigang Xu
  • Patent number: 8737992
    Abstract: In a signal processing method, an input signal is provided at an input to a receiver. A bandwidth of the receiver is controlled to a predetermined wideband setting. For band in a plurality of frequency bands, the input signal is processed at the receiver with a mixer, an amplifier, and a filter, to generate a first processed signal, and a power spectral density of the processed signal is generated over that frequency band, to provide a frequency domain signal for that frequency band. Based on the frequency domain signals corresponding to each frequency band in the plurality of frequency bands, a frequency domain representation of the processed signal is reconstructed over a reconstruction band having a bandwidth larger than the predetermined wideband setting. Based on the reconstructed frequency domain representation, a spectral component is identified corresponding to at least one cellular telephony access mode.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 27, 2014
    Assignee: Spreadtrum Communication USA Inc.
    Inventors: David Haub, Zhigang Xu
  • Publication number: 20140096358
    Abstract: A device and a method for a field expansion. A support core (30) is inserted into the device by a field expansion apparatus. The field expansion apparatus has a pressure applying means (20) defining a radially expandable inner surface and a flat surface radially outwardly extending from the radially expandable inner surface. The device comprises an elastomeric tubing (10) and an adapter (40). The elastomeric tubing (10) has a forward end opposite a rearward end and an axial bore extending therethrough configured to receive the support core (30). The adapter (40) has a step portion (41) defined by a radial outer surface (42) and a flat surface (43) radially outwardly extending from the radial outer surface (42), and an axial bore (44) extending therethrough. The axial bore (44) has a diameter substantially the same as the diameter of the axial bore (12) of the elastomeric tubing (10).
    Type: Application
    Filed: July 27, 2011
    Publication date: April 10, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ming Zhang, Jinquan Yang, Zheng Huang, Zhigang Xu, Jiangjiang Ma
  • Patent number: 8654463
    Abstract: A device and a method for controlling a bit density of a magnetic card (2) are provided. Said control device comprises a stepper motor (1) providing power to drive the magnetic card (2) or a recording magnetic head (15), a transmission mechanism transferring power to the magnetic card (2) or the recording magnetic head (15), a CPU (10) sending magnetic recording information, a track data encoder (13) receiving a magnetic writing pulse signal (CLK1) and generating magnetic writing data in synchronization with the magnetic writing pulse signal (CLK1), and a magnetic head driving circuit (14) outputting a magnetic writing control signal based on the magnetic writing data. The frequency of the magnetic writing pulse signal (CLK1) and the frequency of a driving pulse signal (CLK0) of the stepper motor are in a linear relationship. Said control method is a method for controlling a bit density.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: February 18, 2014
    Assignee: Shandong New Beiyang Information Technology Co., Ltd
    Inventors: Zhigang Xu, Guangdong Hu, Bingqing Liu, Mingang Ou, Zhenhu Xie
  • Publication number: 20140004812
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the relative frequency location of the interference is detected. The relative frequency location specifies whether the frequency of the interference is high side (above the desired signal, i.e., at a higher frequency) or low side (below the desired signal). The receiver is configured based on the detected interference and relative location thereof. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 2, 2014
    Applicant: Spreadtrum Communications USA Inc.
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Publication number: 20130334767
    Abstract: A sheet medium processing device comprising a stacking mechanism mounted on a frame, a first switching mechanism and a retractable paper baffle adjacent to the medium exit of the stacking mechanism; the stacking mechanism comprises a lower ticket stacking assembly, an upper ticket stacking assembly capable of moving parallelly above the lower ticket stacking assembly and a parallel movement confining mechanism, wherein the upper ticket stacking assembly and the lower ticket stacking assembly are both belt-conveyor mechanisms, and the belt of the upper ticket stacking assembly has a tendency of tightly pressing against the belt of the lower ticket stacking assembly. The first switching mechanism simultaneously controls the reciprocation of the paper baffle and the parallel movement of the upper ticket stacking assembly, enabling the stacking mechanism to be selectively provided with a transport state and a stacking state.
    Type: Application
    Filed: January 11, 2012
    Publication date: December 19, 2013
    Applicant: Shendong New Beiyang Information Technology Co., Ltd.
    Inventors: Zhenxing Zhao, Zhigang Xu, Ming Gao, Qingbang Xu
  • Publication number: 20130309989
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, power estimation circuits are used to determine the exact nature of the interference and to optimize the performance correspondingly. Variable selectivity of at least one power estimation circuit is achieved using a filter with variable bandwidth, with power measurements taken using different bandwidth settings. Also, the actual method of optimizing the receiver performance is novel compared to the prior art in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Application
    Filed: July 22, 2013
    Publication date: November 21, 2013
    Applicant: Spreadtrum Communications USA
    Inventors: David HAUB, Zhigang Xu, Jarrett Malone
  • Patent number: 8497890
    Abstract: A thermal print head detecting device comprises a power supply (1), a power supply switch (4), a power supply switch control circuit (5), a first detecting resistor (Ra), a second detecting resistor (Rb), a print head (2) to be detected and a print head control circuit (3); an output end of the power supply (1) is connected to a common joint (N) of respective heating elements of the print head through the power supply switch (4), the first detecting resistor (Ra) is connected in parallel with the power supply switch (4); an output end of the power supply switch control circuit (5) is connected to a control end of the power supply switch (4); the second detecting resistor (Rb) has one end connected to the common joint (N) of the heating element units, and the other end grounded; and the print head control circuit (3) controls strobing of each heating element unit of the print head.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 30, 2013
    Assignee: Shandong New Beiyang Information Technology Co., Ltd
    Inventors: Changgang Gu, Zhigang Xu, Guangdong Hu, Yuguo Wang, Xiangang Yang
  • Patent number: 8494469
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, power estimation circuits are used to determine the exact nature of the interference and to optimize the performance correspondingly. Variable selectivity of at least one power estimation circuit is achieved using a filter with variable bandwidth, with power measurements taken using different bandwidth settings. Also, the actual method of optimizing the receiver performance is novel compared to the prior art in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: July 23, 2013
    Assignee: Spreadtrum Communications USA Inc.
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Patent number: 8459769
    Abstract: A grayscale printing control method, a device thereof and a storage medium are provided. The method comprises: determining the grayscale level of image data of each point in each point line and converting the same into multi-bit binary data; forming a data set using the binary data of the same bit of all the points in a point line, thereby forming multiple data sets; each data set corresponding to a predetermined strobe time, and the print head heater corresponding to each point heating upon receiving predetermined data during the strobe time. The present invention can reduce the number of printing strobes and the times of data transmission while ensuring printing quality, thereby greatly improving printing speed.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: June 11, 2013
    Assignee: Shandong New Beiyang Information Technology Co., Ltd
    Inventors: Zhigang Xu, Qiangzi Cong, Chuntao Wang, Lei Che, Jiabo Xu
  • Publication number: 20130143115
    Abstract: A preparation method of a three-dimensional nanosized porous metal oxide electrode material of lithium ion battery, which soaks a dried polymer colloidal crystal microsphere template in a metal salt solution as a precursor solution for a period of time, and obtains a precursor template complex after filtration and drying; heats the precursor template complex to a certain temperature at a low heating rate and keeps the temperature, and then obtains the three-dimensional nanosized porous metal oxide electrode material of lithium ion battery after cooling to room temperature. A metal oxide electrode material is manufactured, with the three-dimensional nanosized porous metal oxide electrode material thereby improving the ionic conductivity of the negative electrode material of lithium ion battery, and shortens the diffusion path of the lithium ions during an electrochemical reaction process, and improves the rate discharge performance of lithium ion battery greatly.
    Type: Application
    Filed: June 27, 2011
    Publication date: June 6, 2013
    Applicant: Shanghai Zhongke Shenjiang Electric Vehicle Co., Ltd.
    Inventors: Jiangming Sun, Tiepeng Zhao, Zhigang Xu, Yanbing Wang, Gang Wang, Ming Zhang, Shirong Xie
  • Publication number: 20130102267
    Abstract: Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, power estimation circuits are used to determine the exact nature of the interference and to optimize the performance correspondingly. Variable selectivity of at least one power estimation circuit is achieved using a filter with variable bandwidth, with power measurements taken using different bandwidth settings. Also, the actual method of optimizing the receiver performance is novel compared to the prior art in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Application
    Filed: October 24, 2011
    Publication date: April 25, 2013
    Applicant: Spreadtrum Communications USA
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Patent number: 8382108
    Abstract: The present invention provides a recording medium overturning mechanism, comprising: a bracket (100); an entry (50) and an exit (60), arranged in the bracket (100); a first channel (10), communicating the entry (50) with the exit (60) to convey a recording medium which does not need to be overturned; a second channel (20), communicating with the entry (50) to convey a recording medium which needs to be overturned; a third channel (30), communicating with the exit (60) and the second channel (20) to convey the overturned recording medium, wherein the first channel (10), the second channel (20) and the third channel (30) are basically arranged in an inverted triangle and joined with each other; a channel switching mechanism (40), arranged on the bracket (100) and located at a joining area between the first channel (10) and the second channel (20); and an overturning roller (70), arranged on the bracket (100) and located at a joining area between the second channel (20) and the third channel (30), the overturnin
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: February 26, 2013
    Assignee: Shangdong New Beiyang Information Technology Co., Ltd.
    Inventors: Ming Gao, Zhenxing Zhao, Zhigang Xu, Qiangzi Cong, Tianxin Jiang
  • Publication number: 20130028357
    Abstract: A novel receiver architecture optimizes receiver performance in the presence of interference. In various embodiments, power estimation circuits are used with variable selectivity to determine the exact nature of the interference and to optimize the performance correspondingly. The variable selectivity is achieved using stages of filtering with progressively narrower bandwidths. Also, the actual method of optimizing the receiver performance is novel compared to the prior art in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Spreadtrum Communications USA
    Inventors: David Haub, Zhigang Xu, Jarrett Malone
  • Publication number: 20120224212
    Abstract: The present invention discloses a ticket issuing method, comprising: step a: acquiring the image of a ticket paper for issuing a ticket, recognizing a ticket number from the image acquired and determining the validity of the ticket number recognized, to obtain a valid ticket number; step b: printing on the corresponding ticket paper the ticket issuing information containing the ticket number, when receiving a ticket issuing instruction. The present invention also discloses a ticket issuing device, comprising: an image acquisition unit (35), a printing unit (34) and a controller (31) for sending the image of the ticket paper acquired by the image acquisition unit or the ticket number recognized from the image of the ticket paper to a host computer (40) and controlling the printing unit (34) to print on the ticket paper according to the ticket issuing instruction and the ticket issuing information received.
    Type: Application
    Filed: November 4, 2010
    Publication date: September 6, 2012
    Inventors: Zhigang Xu, Chuntao Wang, Lei Che, Guangdong Hu, Xin Wang
  • Publication number: 20120119438
    Abstract: The present invention provides a recording medium overturning mechanism, comprising: a bracket (100); an entry (50) and an exit (60), arranged in the bracket (100); a first channel (10), communicating the entry (50) with the exit (60) to convey a recording medium which does not need to be overturned; a second channel (20), communicating with the entry (50) to convey a recording medium which needs to be overturned; a third channel (30), communicating with the exit (60) and the second channel (20) to convey the overturned recording medium, wherein the first channel (10), the second channel (20) and the third channel (30) are basically arranged in an inverted triangle and joined with each other; a channel switching mechanism (40), arranged on the bracket (100) and located at a joining area between the first channel (10) and the second channel (20); and an overturning roller (70), arranged on the bracket (100) and located at a joining area between the second channel (20) and the third channel (30), the overturnin
    Type: Application
    Filed: July 23, 2009
    Publication date: May 17, 2012
    Applicant: Shandong New Beiyang Information Technology Co Ltd
    Inventors: Ming Gao, Zhenxing Zhao, Zhigang Xu, Qiangzi Cong, Tianxin Jiang
  • Publication number: 20110242254
    Abstract: A thermal print head detecting device comprises a power supply (1), a power supply switch (4), a power supply switch control circuit (5), a first detecting resistor (Ra), a second detecting resistor (Rb), a print head (2) to be detected and a print head control circuit (3); an output end of the power supply (1) is connected to a common joint (N) of respective heating elements of the print head through the power supply switch (4), the first detecting resistor (Ra) is connected in parallel with the power supply switch (4); an output end of the power supply switch control circuit (5) is connected to a control end of the power supply switch (4); the second detecting resistor (Rb) has one end connected to the common joint (N) of the heating element units, and the other end grounded; and the print head control circuit (3) controls strobing of each heating element unit of the print head.
    Type: Application
    Filed: November 25, 2009
    Publication date: October 6, 2011
    Inventors: Changgang Gu, Zhigang Xu, Guangdong Hu, Yuguo Wang, Xiangang Yang