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).
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Publication number: 20140302809Abstract: 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: ApplicationFiled: June 23, 2014Publication date: October 9, 2014Applicant: Spreadtrum Communications USA Inc.Inventors: David Haub, Zhigang Xu, Jarrett Malone
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Patent number: 8787507Abstract: 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: GrantFiled: July 25, 2011Date of Patent: July 22, 2014Assignee: Spreadtrum Communications USAInventors: David Haub, Zhigang Xu, Jarrett Malone
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Patent number: 8761702Abstract: 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: GrantFiled: July 2, 2012Date of Patent: June 24, 2014Assignee: Spreadtrum Communications USA Inc.Inventors: David Haub, Zhigang Xu, Jarrett Malone
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Publication number: 20140155060Abstract: 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: ApplicationFiled: December 3, 2012Publication date: June 5, 2014Inventors: David Haub, Zhigang Xu
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Patent number: 8737992Abstract: 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: GrantFiled: December 3, 2012Date of Patent: May 27, 2014Assignee: Spreadtrum Communication USA Inc.Inventors: David Haub, Zhigang Xu
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Publication number: 20140096358Abstract: 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: ApplicationFiled: July 27, 2011Publication date: April 10, 2014Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Ming Zhang, Jinquan Yang, Zheng Huang, Zhigang Xu, Jiangjiang Ma
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Patent number: 8654463Abstract: 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: GrantFiled: January 20, 2009Date of Patent: February 18, 2014Assignee: Shandong New Beiyang Information Technology Co., LtdInventors: Zhigang Xu, Guangdong Hu, Bingqing Liu, Mingang Ou, Zhenhu Xie
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Publication number: 20140004812Abstract: 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: ApplicationFiled: July 2, 2012Publication date: January 2, 2014Applicant: Spreadtrum Communications USA Inc.Inventors: David Haub, Zhigang Xu, Jarrett Malone
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Publication number: 20130334767Abstract: 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: ApplicationFiled: January 11, 2012Publication date: December 19, 2013Applicant: Shendong New Beiyang Information Technology Co., Ltd.Inventors: Zhenxing Zhao, Zhigang Xu, Ming Gao, Qingbang Xu
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Publication number: 20130309989Abstract: 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: ApplicationFiled: July 22, 2013Publication date: November 21, 2013Applicant: Spreadtrum Communications USAInventors: David HAUB, Zhigang Xu, Jarrett Malone
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Patent number: 8497890Abstract: 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: GrantFiled: November 25, 2009Date of Patent: July 30, 2013Assignee: Shandong New Beiyang Information Technology Co., LtdInventors: Changgang Gu, Zhigang Xu, Guangdong Hu, Yuguo Wang, Xiangang Yang
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Patent number: 8494469Abstract: 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: GrantFiled: October 24, 2011Date of Patent: July 23, 2013Assignee: Spreadtrum Communications USA Inc.Inventors: David Haub, Zhigang Xu, Jarrett Malone
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Patent number: 8459769Abstract: 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: GrantFiled: December 11, 2008Date of Patent: June 11, 2013Assignee: Shandong New Beiyang Information Technology Co., LtdInventors: Zhigang Xu, Qiangzi Cong, Chuntao Wang, Lei Che, Jiabo Xu
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Publication number: 20130143115Abstract: 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: ApplicationFiled: June 27, 2011Publication date: June 6, 2013Applicant: Shanghai Zhongke Shenjiang Electric Vehicle Co., Ltd.Inventors: Jiangming Sun, Tiepeng Zhao, Zhigang Xu, Yanbing Wang, Gang Wang, Ming Zhang, Shirong Xie
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Publication number: 20130102267Abstract: 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: ApplicationFiled: October 24, 2011Publication date: April 25, 2013Applicant: Spreadtrum Communications USAInventors: David Haub, Zhigang Xu, Jarrett Malone
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Patent number: 8382108Abstract: 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 overturninType: GrantFiled: July 23, 2010Date of Patent: February 26, 2013Assignee: Shangdong New Beiyang Information Technology Co., Ltd.Inventors: Ming Gao, Zhenxing Zhao, Zhigang Xu, Qiangzi Cong, Tianxin Jiang
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Publication number: 20130028357Abstract: 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: ApplicationFiled: July 25, 2011Publication date: January 31, 2013Applicant: Spreadtrum Communications USAInventors: David Haub, Zhigang Xu, Jarrett Malone
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Publication number: 20120224212Abstract: 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: ApplicationFiled: November 4, 2010Publication date: September 6, 2012Inventors: Zhigang Xu, Chuntao Wang, Lei Che, Guangdong Hu, Xin Wang
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Publication number: 20120119438Abstract: 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 overturninType: ApplicationFiled: July 23, 2009Publication date: May 17, 2012Applicant: Shandong New Beiyang Information Technology Co LtdInventors: Ming Gao, Zhenxing Zhao, Zhigang Xu, Qiangzi Cong, Tianxin Jiang
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Publication number: 20110242254Abstract: 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: ApplicationFiled: November 25, 2009Publication date: October 6, 2011Inventors: Changgang Gu, Zhigang Xu, Guangdong Hu, Yuguo Wang, Xiangang Yang