Patents by Inventor Eduardo Rodrigues de Lima
Eduardo Rodrigues de Lima 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: 11736248Abstract: A digital radio OFDM modulator and demodulator provide an efficient mode and a backwards-compatible mode to work with IEEE 802.15.4g or a similar standard. In backwards-compatible mode, they use a single method for error encoding physical header and payload transmit data, and a single method for detecting and correcting errors in physical header and payload receive data. In efficient mode, they use two different methods. The payload is BCH-LDPC encoded. They may also use mapping constellations that are not available in IEEE 802.15.4g, including 64-QAM, 256-QAM, and APSK. To ensure that physical header data can be received more robustly than payload data, they use frequency diversity of the physical header data, and selection maximal ratio combining (SMRC) in the demodulator to reduce the bit error rate (BER) at a low cost.Type: GrantFiled: April 27, 2022Date of Patent: August 22, 2023Assignee: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Denise Alves Tamagno, Gabriel Santos da Silva, Daniel Garcia Urdaneta
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Patent number: 11606477Abstract: A camera has two or more color elements that are removable and replaceable. The color elements may include a lens, a color filter with a filter data interface, and an image sensor. A security processor includes a private key, firmware, and has storage room for one or more vegetation indices. The security processor securely decrypts, stores, and uses the indices. Firmware checks license terms and installed filters required in a selected index, and analyzes images based on a formula in the index, thresholds for the index value, and thresholds for an object's height above ground level. A positioning receiver (e.g. GPS) determines time and position, which the firmware uses for the license check and for the height AGL calculation. Differences in camera position allow determining a parallax calculation on correlated groups of pixels. The camera provides on-the-fly analysis, and tags and stores images for which alert conditions are met.Type: GrantFiled: January 18, 2021Date of Patent: March 14, 2023Assignee: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Lucas Diogo de Mendonca
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Publication number: 20220376853Abstract: A digital radio OFDM modulator and demodulator provide an efficient mode and a backwards-compatible mode to work with IEEE 802.15.4g or a similar standard. In backwards-compatible mode, they use a single method for error encoding physical header and payload transmit data, and a single method for detecting and correcting errors in physical header and payload receive data. In efficient mode, they use two different methods. The payload is BCH-LDPC encoded. They may also use mapping constellations that are not available in IEEE 802.15.4g, including 64-QAM, 256-QAM, and APSK. To ensure that physical header data can be received more robustly than payload data, they use frequency diversity of the physical header data, and selection maximal ratio combining (SMRC) in the demodulator to reduce the bit error rate (BER) at a low cost.Type: ApplicationFiled: April 27, 2022Publication date: November 24, 2022Applicant: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Denise Alves Tamagno, Gabriel Santos da Silva, Daniel Garcia Urdaneta
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Publication number: 20210224428Abstract: A camera has two or more color elements that are removable and replaceable. The color elements may include a lens, a color filter with a filter data interface, and an image sensor. A security processor includes a private key, firmware, and has storage room for one or more vegetation indices. The security processor securely decrypts, stores, and uses the indices. Firmware checks license terms and installed filters required in a selected index, and analyzes images based on a formula in the index, thresholds for the index value, and thresholds for an object's height above ground level. A positioning receiver (e.g. GPS) determines time and position, which the firmware uses for the license check and for the height AGL calculation. Differences in camera position allow determining a parallax calculation on correlated groups of pixels. The camera provides on-the-fly analysis, and tags and stores images for which alert conditions are met.Type: ApplicationFiled: January 18, 2021Publication date: July 22, 2021Applicant: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Lucas Diogo de Mendonca
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Patent number: 10320595Abstract: A reduced COordinate Rotation DIgital Computer (CORDIC) cell in a parallel CORDIC has an xy-path from x and y inputs to x and y outputs, and a z-path from a z-input to a z-output. Bit-shifts in the xy-path are hardwired. The z-path has a shortened adder/subtractor with a built-in or hardwired fixed parameter. Input bits from the z-input are split into most significant and least significant bits. The number of most significant bits equals the shortened adder/subtractor width. The most significant bits are input to the non-inverting inputs of the adder/subtractor for calculating the most significant z-output bits. The least significant bits are connected directly (or via buffers) from the z-input to the z-output.Type: GrantFiled: June 17, 2018Date of Patent: June 11, 2019Assignee: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Tiago Diadami Perez
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Publication number: 20180375699Abstract: A reduced COordinate Rotation DIgital Computer (CORDIC) cell in a parallel CORDIC has an xy-path from x and y inputs to x and y outputs, and a z-path from a z-input to a z-output. Bit-shifts in the xy-path are hardwired. The z-path has a shortened adder/subtractor with a built-in or hardwired fixed parameter. Input bits from the z-input are split into most significant and least significant bits. The number of most significant bits equals the shortened adder/subtractor width. The most significant bits are input to the non-inverting inputs of the adder/subtractor for calculating the most significant z-output bits. The least significant bits are connected directly (or via buffers) from the z-input to the z-output.Type: ApplicationFiled: June 17, 2018Publication date: December 27, 2018Applicant: Instituto de Pesquisas EldoradoInventors: Eduardo Rodrigues de Lima, Tiago Diadami Perez
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Patent number: 9544114Abstract: An inverse channel estimation method includes receiving a modulated signal with a pilot. A local reference pilot, matching the received pilot as it was prior to transmission, is divided by a scaled version of the received pilot's power. The division result is scaled again and multiplied with a conjugate value of the received pilot signal, to obtain the inverse channel estimate. Scaling may be performed using bit shifting. The division is performed using a CORDIC algorithm. If multiple pilots are received, interpolation can be performed to provide channel estimates for time and/or frequencies in between. Interpolation can be based on the Farrow method. The received signal may be equalized by multiplying it with the inverse channel estimate.Type: GrantFiled: February 11, 2016Date of Patent: January 10, 2017Assignee: Instituto de Pesquisas EldoradoInventor: Eduardo Rodrigues de Lima
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Publication number: 20160241370Abstract: An inverse channel estimation method includes receiving a modulated signal with a pilot. A local reference pilot, matching the received pilot as it was prior to transmission, is divided by a scaled version of the received pilot's power. The division result is scaled again and multiplied with a conjugate value of the received pilot signal, to obtain the inverse channel estimate. Scaling may be performed using bit shifting. The division is performed using a CORDIC algorithm. If multiple pilots are received, interpolation can be performed to provide channel estimates for time and/or frequencies in between. Interpolation can be based on the Farrow method. The received signal may be equalized by multiplying it with the inverse channel estimate.Type: ApplicationFiled: February 11, 2016Publication date: August 18, 2016Applicant: Instituto de Pesquisas EldoradoInventor: Eduardo Rodrigues de Lima