Patents by Inventor Richard Chi
Richard Chi 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: 20170340879Abstract: This invention described a method of, and device for increasing human ability for idea generation and insight related tasks. “Thinking outside the box” is difficult and often requires a qualitatively different perception of the task at hand. One aspect of the invention is a method for facilitating such pursuits by applying electrical stimulation at selected brain areas before or during an idea generation or insight related task. One aspect of our method is to temporarily enable a person to perceive insight related tasks in a way that is less influenced by past expectations and more open to novel representations. In one embodiment, this is achieved by suppressing the left anterior temporal lobe and/or facilitating the right anterior temporal lobe with non-invasive electrical stimulation.Type: ApplicationFiled: July 31, 2014Publication date: November 30, 2017Inventor: Richard Chi
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Publication number: 20160030703Abstract: This invention described a method of, and device for increasing human ability for idea generation and insight related tasks. “Thinking outside the box” is difficult and often requires a qualitatively different perception of the task at hand. One aspect of the invention is a method for facilitating such pursuits by applying electrical stimulation at selected brain areas before or during an idea generation or insight related task. One aspect of our method is to temporarily enable a person to perceive insight related tasks in a way that is less influenced by past expectations and more open to novel representations. In one embodiment, this is achieved by suppressing the left anterior temporal lobe and/or facilitating the right anterior temporal lobe with non-invasive electrical stimulation.Type: ApplicationFiled: July 31, 2014Publication date: February 4, 2016Inventor: Richard Chi
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Patent number: 8023988Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: GrantFiled: April 28, 2008Date of Patent: September 20, 2011Assignee: QUALCOMM IncorporatedInventors: Da-Shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Patent number: 8014473Abstract: Techniques for detecting received sequences when certain signaling characteristics (e.g., transport formats, rates) are not known a priori at the receiver. In one method, a sequence for a transmitted message is received, and a metric value is computed for each of a number of hypothesized messages corresponding to a number of hypotheses for the unknown signaling characteristic of the transmitted message. The metric value is computed based on a MAP metric derived to approximately maximize a joint a posteriori probability between the received sequence and the hypothesized messages. The hypothesized message having the best metric value is selected as the transmitted message. The specific form of the MAP metric is dependent on the particular signaling scheme used to map the message to its corresponding sequence, and may be used for blind transport format detection (BTFD) in a W-CDMA system and blind rate detection in an IS-95 CDMA system.Type: GrantFiled: April 12, 2001Date of Patent: September 6, 2011Assignee: Qualcomm IncorporatedInventors: Richard Chi, Da-Shan Shiu
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Patent number: 7966032Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: GrantFiled: November 1, 2005Date of Patent: June 21, 2011Assignee: QUALCOMM IncorporatedInventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Patent number: 7734309Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: GrantFiled: May 18, 2007Date of Patent: June 8, 2010Assignee: QUALCOMM IncorportedInventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Publication number: 20080233995Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: ApplicationFiled: April 28, 2008Publication date: September 25, 2008Inventors: Da-shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Patent number: 7376438Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: GrantFiled: October 12, 2005Date of Patent: May 20, 2008Assignee: QUALCOMM IncorporatedInventors: Da-shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Publication number: 20070218935Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: ApplicationFiled: May 18, 2007Publication date: September 20, 2007Applicant: QUALCOMM INCORPORATEDInventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Publication number: 20060189342Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: ApplicationFiled: November 1, 2005Publication date: August 24, 2006Inventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Patent number: 7035343Abstract: A trellis decoder determines the most likely transmitted phase in response to previously requested phase adjustments and observed transmitted symbols. Maximum a posteriori (MAP) decoding also may be used. Alternatively, the identified likely transmitted phase is used for data demodulation. This and related features have the benefit of decreasing the effect of phase discrepancies introduced by erroneous reception of phase adjustment information, resulting in improved error rates, and a corresponding increase in system capacity, data throughput, or both.Type: GrantFiled: January 31, 2002Date of Patent: April 25, 2006Assignee: Qualcomm Inc.Inventors: Richard Chi, Jittra Jootar, Parvathanathan Subrahmanya
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Patent number: 7010321Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: GrantFiled: February 4, 2002Date of Patent: March 7, 2006Assignee: Qualcomm Inc.Inventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Publication number: 20060040698Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified- for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: ApplicationFiled: October 12, 2005Publication date: February 23, 2006Inventors: Da-shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Patent number: 6983166Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: GrantFiled: August 20, 2001Date of Patent: January 3, 2006Assignee: Qualcomm, IncorporatedInventors: Da-shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Patent number: 6738437Abstract: A received symbol stream is oversampled and correlated with a known sync word to determine the correlation properties of the oversampled signal with a known sync word. A linear filter, such as a moving average window filter, is convolved with the correlation signal to generate a convolution signal. Once the convolution signal has reached a predetermined threshold, it is scanned over a predetermined window of oversamples. If the convolution signal exceeds the threshold for the window of oversamples, the sync word has been found and the symbol stream is down-sampled at intervals that depend on the data rate of the symbol stream. This down-sampling process may be done by picking the center oversample corresponding to each information symbol given the timing alignment, or by doing a majority vote over a multiple number of samples centered around the center oversample.Type: GrantFiled: May 30, 2001Date of Patent: May 18, 2004Assignee: Qualcomm IncorporatedInventors: Richard Chi, Ranganathan Krishnan, Avneesh Agrawal, Jittra Jootar
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Publication number: 20030148769Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.Type: ApplicationFiled: February 4, 2002Publication date: August 7, 2003Inventors: Richard Chi, Da-Shan Shiu, Nitin Kasturi, Parvathanathan Subrahmanya
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Publication number: 20030142755Abstract: Techniques for closed loop transmit diversity antenna verification are disclosed. In one aspect, a trellis decoder is used to determine the most likely transmitted phase in response to previously requested phase adjustments and observed transmitted symbols. In another aspect, maximum a posteriori (MAP) decoding is used. In yet another aspect, the identified likely transmitted phase is used for data demodulation. Various other aspects of the invention are also presented. These aspects have the benefit of decreasing the effect of phase discrepancies introduced by erroneous reception of phase adjustment information, resulting in improved error rates, and a corresponding increase in system capacity, data throughput, or both.Type: ApplicationFiled: January 31, 2002Publication date: July 31, 2003Inventors: Richard Chi, Jittra Jootar, Parvathanathan Subrahmanya
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Publication number: 20030036403Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.Type: ApplicationFiled: August 20, 2001Publication date: February 20, 2003Inventors: Da-shan Shiu, Serge Willenegger, Richard Chi, Parvathanathan Subrahmanya, Chih-Ping Hsu
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Publication number: 20020161737Abstract: A received symbol stream is oversampled and correlated with a known sync word to determine the correlation properties of the oversampled signal with a known sync word. A linear filter, such as a moving average window filter, is convolved with the correlation signal to generate a convolution signal. Once the convolution signal has reached a predetermined threshold, it is scanned over a predetermined window of oversamples. If the convolution signal exceeds the threshold for the window of oversamples, the sync word has been found and the symbol stream is down-sampled at intervals that depend on the data rate of the symbol stream. This down-sampling process may be done by picking the center oversample corresponding to each information symbol given the timing alignment, or by doing a majority vote over a multiple number of samples centered around the center oversample.Type: ApplicationFiled: May 30, 2001Publication date: October 31, 2002Inventors: Richard Chi, Ranganathan Krishnan, Avneesh Agrawal, Jittra Jootar
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Publication number: 20020131532Abstract: Techniques for detecting received sequences when certain signaling characteristics (e.g., transport formats, rates) are not known a priori at the receiver. In one method, a sequence for a transmitted message is received, and a metric value is computed for each of a number of hypothesized messages corresponding to a number of hypotheses for the unknown signaling characteristic of the transmitted message. The metric value is computed based on a MAP metric derived to approximately maximize a joint a posteriori probability between the received sequence and the hypothesized messages. The hypothesized message having the best metric value is selected as the transmitted message. The specific form of the MAP metric is dependent on the particular signaling scheme used to map the message to its corresponding sequence, and may be used for blind transport format detection (BTFD) in a W-CDMA system and blind rate detection in an IS-95 CDMA system.Type: ApplicationFiled: April 12, 2001Publication date: September 19, 2002Inventors: Richard Chi, Da-Shan Shiu