Patents by Inventor Isaac M. Jeng
Isaac M. Jeng 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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Patent number: 10476708Abstract: Methods, apparatus, systems and articles of manufacture to implement a signal scrambler are disclosed. An example method includes generating, by executing an instruction with a processor, a controlled random sequence based on a plurality of subcarriers and a random pulse sequence. The example method also includes forming, by executing an instruction with the processor, an output sequence by combining a source sequence with the controlled random sequence, the controlled random sequence to modify a characteristic of the source sequence in a frequency domain.Type: GrantFiled: April 13, 2016Date of Patent: November 12, 2019Assignee: THE BOEING COMPANYInventor: Isaac M. Jeng
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Patent number: 10439754Abstract: Methods, apparatus, systems, and articles of manufacture to implement a third-order signal scrambler are disclosed. An example apparatus includes a controlled scramble generator to generate a controlled random sequence based on one or more subcarriers and a random pulse sequence, the random pulse sequence based on an output of a random number generator processed by a multi-order sinusoidal noise function. The example apparatus further includes a sequence modifier to form an output sequence by combining a source sequence with the controlled random sequence, the controlled random sequence to modify a characteristic of the source sequence in a frequency domain.Type: GrantFiled: March 30, 2017Date of Patent: October 8, 2019Assignee: The Boeing CompanyInventor: Isaac M. Jeng
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Patent number: 10075312Abstract: Constant-envelope phase-optimized transmission methods and apparatus are disclosed. An example method includes determining initial values of modulation phases in a first quadrant, the modulation phases associated with binary codes to be transmitted; and optimizing the initial values to second values to enable a product of an objective function to be within a threshold value.Type: GrantFiled: March 8, 2017Date of Patent: September 11, 2018Assignee: The Boeing CompanyInventors: Isaac M. Jeng, Brandon M. Jones
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Publication number: 20170302411Abstract: Methods, apparatus, systems and articles of manufacture to implement a signal scrambler are disclosed. An example method includes generating, by executing an instruction with a processor, a controlled random sequence based on a plurality of subcarriers and a random pulse sequence. The example method also includes forming, by executing an instruction with the processor, an output sequence by combining a source sequence with the controlled random sequence, the controlled random sequence to modify a characteristic of the source sequence in a frequency domain.Type: ApplicationFiled: April 13, 2016Publication date: October 19, 2017Inventor: Isaac M. Jeng
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Publication number: 20170302400Abstract: Methods, apparatus, systems, and articles of manufacture to implement a third-order signal scrambler are disclosed. An example apparatus includes a controlled scramble generator to generate a controlled random sequence based on one or more subcarriers and a random pulse sequence, the random pulse sequence based on an output of a random number generator processed by a multi-order sinusoidal noise function. The example apparatus further includes a sequence modifier to form an output sequence by combining a source sequence with the controlled random sequence, the controlled random sequence to modify a characteristic of the source sequence in a frequency domain.Type: ApplicationFiled: March 30, 2017Publication date: October 19, 2017Inventor: Isaac M. Jeng
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Publication number: 20170180172Abstract: Constant-envelope phase-optimized transmission methods and apparatus are disclosed. An example method includes determining initial values of modulation phases in a first quadrant, the modulation phases associated with binary codes to be transmitted; and optimizing the initial values to second values to enable a product of an objective function to be within a threshold value.Type: ApplicationFiled: March 8, 2017Publication date: June 22, 2017Inventors: Isaac M. Jeng, Brandon M. Jones
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Patent number: 9614705Abstract: Constant-envelope phase-optimized transmission methods and apparatus are disclosed. An example method includes determining initial values of modulation phases in a first quadrant, the modulation phases associated with binary codes to be transmitted; and optimizing the initial values to second values to enable a product of an objective function to be within a threshold value.Type: GrantFiled: May 20, 2015Date of Patent: April 4, 2017Assignee: THE BOEING COMPANYInventors: Isaac M. Jeng, Brandon M. Jones
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Publication number: 20160344579Abstract: Constant-envelope phase-optimized transmission methods and apparatus are disclosed. An example method includes determining initial values of modulation phases in a first quadrant, the modulation phases associated with binary codes to be transmitted; and optimizing the initial values to second values to enable a product of an objective function to be within a threshold value.Type: ApplicationFiled: May 20, 2015Publication date: November 24, 2016Inventors: Isaac M. Jeng, Brandon M. Jones
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Patent number: 9503152Abstract: Methods and apparatus for generating composite code sequences are disclosed. An example method includes determining, via a determiner, a first number of samples to be contributed into a first unit duration of a composite code sequence from respective first, second, and third component code sequences; based on the first number of samples determined, randomly selecting, via a randomizer, the first number of samples from the respective ones of the first, second, and third component code sequences to enable the selected samples to more accurately represent the respective ones of the first, second, and third component code sequences; and compiling, via a compiler, the selected samples into the first unit duration of the composite code sequence by interspersing a sample from the first component code sequence between samples from the second component code sequence or between samples from the third component code sequence.Type: GrantFiled: November 17, 2015Date of Patent: November 22, 2016Assignee: THE BOEING COMPANYInventors: Isaac M. Jeng, David K. Wen
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Patent number: 9485126Abstract: A method and apparatus for producing a transmission of constant envelope on a carrier signal. All possible combinations of all component codes for phases for producing the transmission are defined. Desired component code powers and desired intercode phases between all pairs of component codes are also defined. Still further, a portion of variables of a search process to reduce a number of variables searched by the search process is defined. Even further, deltas and weight variations for standard differences in a Jacobian matrix for use in the search process are defined. Penalty factors to evaluate an objective function of the search process are also defined. The search process is performed.Type: GrantFiled: August 21, 2014Date of Patent: November 1, 2016Assignee: THE BOEING COMPANYInventor: Isaac M. Jeng
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Publication number: 20160112088Abstract: Methods and apparatus for generating composite code sequences are disclosed. An example method includes determining, via a determiner, a first number of samples to be contributed into a first unit duration of a composite code sequence from respective first, second, and third component code sequences; based on the first number of samples determined, randomly selecting, via a randomizer, the first number of samples from the respective ones of the first, second, and third component code sequences to enable the selected samples to more accurately represent the respective ones of the first, second, and third component code sequences; and compiling, via a compiler, the selected samples into the first unit duration of the composite code sequence by interspersing a sample from the first component code sequence between samples from the second component code sequence or between samples from the third component code sequence.Type: ApplicationFiled: November 17, 2015Publication date: April 21, 2016Inventors: Isaac M. Jeng, David K. Wen
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Publication number: 20160056983Abstract: A method and apparatus for producing a transmission of constant envelope on a carrier signal. All possible combinations of all component codes for phases for producing the transmission are defined. Desired component code powers and desired intercode phases between all pairs of component codes are also defined. Still further, a portion of variables of a search process to reduce a number of variables searched by the search process is defined. Even further, deltas and weight variations for standard differences in a Jacobian matrix for use in the search process are defined. Penalty factors to evaluate an objective function of the search process are also defined. The search process is performed.Type: ApplicationFiled: August 21, 2014Publication date: February 25, 2016Inventor: Isaac M. Jeng
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Patent number: 9225384Abstract: Methods and apparatus for generating composite code sequences are disclosed. An example method includes determining a first number of samples to be contributed into a first unit duration of a composite code sequence from respective component code sequences. The method also includes, based on the number of samples determined, randomly selecting samples from a plurality of samples of the respective ones of the component code sequences to enable the selected samples to more accurately represent the plurality of samples of the respective ones of the component code sequences. The method also includes compiling the selected samples into the first unit duration of the composite code sequence.Type: GrantFiled: October 20, 2014Date of Patent: December 29, 2015Assignee: THE BOEING COMPANYInventors: Isaac M. Jeng, David K. Wen
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Patent number: 8295309Abstract: A method for time weighted combining of a plurality of binary phase shift key (BPSK) code sequences that is implemented by providing first, second and third sequences of chips of a BPSK code having a first, second and third code powers, respectively. A majority vote (MV) sequence of chips from the first, second and third sequences of chips is determined and a time multiplexed composite BPSK composite code sequence is formed by selecting a specific number of samples from each of the MV sequence of chips, and the two sequences of chips of the first, second and third sequences of chips that have the highest code powers, to form samples in a unit duration.Type: GrantFiled: March 14, 2008Date of Patent: October 23, 2012Assignee: The Boeing CompanyInventor: Isaac M. Jeng
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Publication number: 20090232164Abstract: A method for time weighted combining of a plurality of binary phase shift key (BPSK) code sequences that is implemented by providing first, second and third sequences of chips of a BPSK code having a first, second and third code powers, respectively. A majority vote (MV) sequence of chips from the first, second and third sequences of chips is determined and a time multiplexed composite BPSK composite code sequence is formed by selecting a specific number of samples from each of the MV sequence of chips, and the two sequences of chips of the first, second and third sequences of chips that have the highest code powers, to form samples in a unit duration.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Inventor: Isaac M. Jeng