Patents by Inventor Baoguo Yang
Baoguo Yang 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: 20160088642Abstract: The disclosure is directed systems and methods for providing robust coexistence for LAA-LTE, including physical layer enhancements and options to support robust coexistence for LAA-LTE, and deployment and evaluation scenarios and methods.Type: ApplicationFiled: September 23, 2015Publication date: March 24, 2016Inventors: Baoguo Yang, Gordon Li
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Publication number: 20140119205Abstract: Hybrid multi-cell channel estimation. At least two different operational modes associated with performing multi-cell channel estimation are combined and performed within different respective iterations of processing in order to generate a multi-cell channel estimate. A device, including at least one wireless interface to support communications with at least one other device and also including at least one processor to process signals received by or to be transmitted from, is operative to generate a multi-cell channel estimate corresponding to two or more respective cells with which the device may communicate. A first operational mode corresponds to time domain (TDOM) based per-tap serial interference cancellation (SIC), and a second operational mode corresponds to frequency domain (FDOM) based per-cell SIC. One implementation operates with no more than one iteration of TDOM based per-tap SIC, and no more than two iterations of FDOM based per-cell SIC.Type: ApplicationFiled: October 26, 2012Publication date: May 1, 2014Applicant: BROADCOM CORPORATIONInventors: Baoguo Yang, Joonsuk Kim, Lek (Sirikiat) Ariyavisitakul, Nelson R. Sollenberger
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Patent number: 8571087Abstract: A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information regarding an expected multi-path signal component of a WCDMA signal. Then, the multi-path scanner module is operable to identify a plurality of multi-path signal components of the WCDMA signal by descrambling, despreading and correlating a known symbol pattern of/with a baseband RX signal within a search window. The multi-path scanner module is operable to determine timing information for the plurality of multi-path signal components of the WCDMA signal found within the search window and to pass this information to a coupled rake receiver combiner module.Type: GrantFiled: November 13, 2009Date of Patent: October 29, 2013Assignee: Broadcom CorporationInventors: Mark David Hahm, Baoguo Yang
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Publication number: 20110258513Abstract: Apparatus having corresponding methods and tangible computer-readable medium embodying instructions executable by a computer to perform the methods comprise: a receiver adapted to receive a signal representing an input code block, wherein the input code block represents information encoded with a (N, K) difference-set cyclic code, wherein the input code block includes N symbols, and wherein the N symbols represent K bits of the information; an estimator adapted to estimate a signal-to-noise ratio of the signal; a raised-threshold majority-logic decoder adapted to decode the input code block according to a raised-threshold majority-logic decoding algorithm when the signal-to-noise ratio does not exceed a first predetermined threshold; and a variable-threshold majority-logic decoder adapted to decode the input code block according to a variable-threshold majority-logic decoding algorithm when the signal-to-noise ratio exceeds the first predetermined threshold.Type: ApplicationFiled: May 8, 2009Publication date: October 20, 2011Inventors: Jing Qian, Cao Zhigang, Baoguo Yang
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Publication number: 20110228886Abstract: Methods having corresponding apparatus and computer-readable media comprise: receiving an estimated frame index, and an estimated symbol index, for a time-sliced OFDM signal; identifying a plurality of possible frame indexes, and a plurality of possible symbol indexes, based on the estimated frame index and the estimated symbol index; selecting a plurality of possible forward error correction code offsets based on the possible frame indexes and the possible symbol indexes; and selecting one of the possible frame indexes, and one of the possible symbol indexes, based on the possible forward error correction code offsets and a SYNC byte of the time-sliced OFDM signal.Type: ApplicationFiled: July 8, 2009Publication date: September 22, 2011Inventors: Junqiang Li, Baoguo Yang
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Patent number: 8023597Abstract: The present invention provides methods for selecting the coarse frequency offset estimation in an orthogonal frequency division multiplexing system that may include: searching within a predefined subset for a set of frequency offset candidates; selectively searching outside the predefined subset for additional frequency offset candidates; and combining one or more ICDC method and CIR based method to select the coarse frequency offset.Type: GrantFiled: April 15, 2008Date of Patent: September 20, 2011Assignee: Augusta Technology, Inc.Inventors: Jianxuan Du, Yue Chen, Baoguo Yang
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Patent number: 8014469Abstract: A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF front end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband processor is operable to receive the baseband signals, to pre-equalization process the baseband signals to produce processed baseband signals, and to post-equalization process soft decisions. The equalizer is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.Type: GrantFiled: April 23, 2009Date of Patent: September 6, 2011Assignee: Broadcom CorporationInventors: Baoguo Yang, Li Fung Chang, Zhijun Gong
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Publication number: 20110182338Abstract: Methods having corresponding apparatus and computer-readable media comprise: receiving an input signal, wherein the input signal includes a DVB-H signal; detecting co-channel interference (CCI) in the signal; suppressing the CCI in the input signal; and demodulating the DVB-H signal after suppressing the CCI.Type: ApplicationFiled: July 7, 2009Publication date: July 28, 2011Inventors: Junqiang Li, Baoguo Yang
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Patent number: 7903728Abstract: Equalizer training method using re-encoded bits and known training sequences. A multi-branch equalizer processing module is operable to cancel interference associated with received radio frequency (RF) burst(s) (e.g., using at least a first equalizer processing branch and a second equalizer processing branch). The first equalizer processing branch is operable to be trained based upon known training sequences and to equalize the received RF burst. The second equalizer processing branch uses at least partially re-encoded data bits to train linear equalizer(s) within the second equalizer processing branch. A buffer may initially store the received RF burst(s), which are retrieved and equalized by the second equalizer processing branch once the linear equalizer(s) are trained. The cooperation operation of these and other various components allows interfering signals to be cancelled and for more accurate processing of the received RF bursts to occur.Type: GrantFiled: April 28, 2009Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Yue Chen, Arkady Molev-Shteiman, Arie Heiman, Nelson R. Sollenberger, Huaiyu (Hanks) Zeng, Baoguo Yang
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Patent number: 7826575Abstract: A channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a multi-branch equalizer processing module that disables a branch of the multi-branch equalizer processing module when the channel length or channel delay spread associated with received radio frequency (RF) bursts exceeds a predetermined threshold. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation by a branch of the multi-branch equalizer processing module in response to such a channel length or channel delay spread.Type: GrantFiled: May 12, 2009Date of Patent: November 2, 2010Assignee: Broadcom CorporationInventors: Baoguo Yang, Huaiyu (Hanks) Zeng
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Patent number: 7826493Abstract: Methods and apparatus for acquiring and verifying a code used by a base station. Acquisition time is reduced and circuitry simplified by performing Phase I and Phase II acquisitions in series, but in parallel with Phase III acquisition and verification, which are done in series. Phase III code acquisition is done by despreading the input signal using each of the possible codes in a code group. An estimation of the frequency offset between the base station and the terminal's local reference is used to correct the phase of the despread signals, which are coherently and non-coherently integrated. The largest accumulated value corresponds to the code used by the base station. The code is verified by despreading the received signal, applying a frequency correction, and demodulating. The demodulated output is a series of symbols, and a count of these symbols verifies the acquired code.Type: GrantFiled: August 26, 2002Date of Patent: November 2, 2010Inventors: Li Fung Chang, Nelson Sollenberger, Baoguo Yang
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Publication number: 20100216506Abstract: A mobile phone device utilizing a first communications protocol and a second communications protocol, comprises: a first system having a general processor, a memory, a first communications system providing for the first communications protocol and utilizing a first communications protocol stack, and a first link; a second system having a dedicated communications accelerator providing for the second communications protocol and utilizing a second communications protocol stack, and a second link; wherein the first link and the second link are connected; and wherein the memory in the first system holds the first communications protocol stack and the second communications protocol stack.Type: ApplicationFiled: February 23, 2010Publication date: August 26, 2010Applicant: AUGUSTA TECHNOLOGY, INC.Inventors: Tung Chang, Ruei-Shiang Suen, Andrea Chen, Baoguo Yang, Yue Chen
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Publication number: 20100054311Abstract: A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information regarding an expected multi-path signal component of a WCDMA signal. Then, the multi-path scanner module is operable to identify a plurality of multi-path signal components of the WCDMA signal by descrambling, despreading and correlating a known symbol pattern of/with a baseband RX signal within a search window. The multi-path scanner module is operable to determine timing information for the plurality of multi-path signal components of the WCDMA signal found within the search window and to pass this information to a coupled rake receiver combiner module.Type: ApplicationFiled: November 13, 2009Publication date: March 4, 2010Applicant: BROADCOM CORPORATIONInventors: Mark David Hahm, Baoguo Yang
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Patent number: 7620099Abstract: A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information regarding an expected multi-path signal component of a WCDMA signal. Then, the multi-path scanner module is operable to identify a plurality of multi-path signal components of the WCDMA signal by descrambling, despreading and correlating a known symbol pattern of/with a baseband RX signal within a search window. The multi-path scanner module is operable to determine timing information for the plurality of multi-path signal components of the WCDMA signal found within the search window and to pass this information to a coupled rake receiver combiner module.Type: GrantFiled: August 31, 2005Date of Patent: November 17, 2009Assignee: Broadcom CorporationInventors: Mark David Hahm, Baoguo Yang
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Publication number: 20090219982Abstract: A channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a multi-branch equalizer processing module that disables a branch of the multi-branch equalizer processing module when the channel length or channel delay spread associated with received radio frequency (RF) bursts exceeds a predetermined threshold. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation by a branch of the multi-branch equalizer processing module in response to such a channel length or channel delay spread.Type: ApplicationFiled: May 12, 2009Publication date: September 3, 2009Applicant: BROADCOM CORPORATIONInventors: Baoguo Yang, Huaiyu (Hanks) Zeng
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Publication number: 20090207899Abstract: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst.Type: ApplicationFiled: April 28, 2009Publication date: August 20, 2009Applicant: BROADCOM CORPORATIONInventors: Yue Chen, Arkady Molev-Shteiman, Arie Heiman, Nelson R. Sollenberger, Huaiyu (Hanks) Zeng, Baoguo Yang
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Publication number: 20090201894Abstract: A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF front end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband processor is operable to receive the baseband signals, to pre-equalization process the baseband signals to produce processed baseband signals, and to post-equalization process soft decisions. The equalizer is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.Type: ApplicationFiled: April 23, 2009Publication date: August 13, 2009Applicant: BROADCOM CORPORATIONInventors: BAOGUO YANG, LI FUNG CHANG, ZHIJUN GONG
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Publication number: 20090168930Abstract: A method for Doppler shift estimation for channel estimation of a received signal, comprising the steps of: calculating time domain correlations; providing a Hamming window over the calculated time domain correlations; calculating a power spectrum by using FFT; calculating an adaptive threshold based on a noise floor and an average power density calculated from the power spectrum; and estimating a Doppler shift based on the adaptive threshold.Type: ApplicationFiled: December 29, 2008Publication date: July 2, 2009Applicant: Augusta Technology, Inc.Inventors: Junqiang Li, Baoguo Yang, Yue Chen
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Patent number: 7542523Abstract: A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF front end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband is operable to receive the baseband signals, to pre-equalization process the baseband signals to produce processed baseband signals, and to post-equalization process soft decisions. The equalizer module is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.Type: GrantFiled: November 2, 2005Date of Patent: June 2, 2009Assignee: Broadcom CorporationInventors: Baoguo Yang, Li Fung Chang, Zhijun Gong
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Patent number: 7535980Abstract: This invention provides channel dispersion estimation algorithm(s). This channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a single-branch or multi-branch equalizer processing module that enables interference cancellation when the channel length or channel delay spread associated with received radio frequency (RF) bursts compares unfavorably to predetermined thresholds. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation in response to such a channel length or channel delay spread. Additionally, the channel length estimation module may adjust the number of equalizer states for the single-branch or first branch of a multi-branch equalizer based the channel length or channel delay spread.Type: GrantFiled: June 13, 2005Date of Patent: May 19, 2009Assignee: Broadcom CorporationInventors: Baoguo Yang, Huaiyu (Hanks) Zeng