-
公开(公告)号：US11054499B2
公开(公告)日：2021-07-06
申请号：US15004443
申请日：2016-01-22
Applicant: Texas Instruments Incorporated
Inventor： Sriram Murali , Karthik Subburaj , Karthik Ramasubramanian
IPC: G01S7/35 , G01S7/40 , G01S13/931
Abstract: A radar system is provided that includes a receive channel configured to receive a reflected signal and to generate a first digital intermediate frequency (IF) signal based on the reflected signal, a reference receive channel configured to receive a reflected signal and to generate a second digital IF signal based on the reflected signal, and digital mismatch compensation circuitry coupled to receive the first digital IF signal and the second digital IF signal, the digital mismatch compensation circuitry configured to process the first digital IF signal and the second digital IF signal to compensate for mismatches between the receive channel and the reference receive channel.
-
公开(公告)号：US10768278B2
公开(公告)日：2020-09-08
申请号：US15333593
申请日：2016-10-25
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Indu Prathapan , Karthik Ramasubramanian , Brian P. Ginsburg
Abstract: A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (
-
公开(公告)号：US10145937B2
公开(公告)日：2018-12-04
申请号：US15088566
申请日：2016-04-01
Applicant: Texas Instruments Incorporated
Inventor： Pankaj Gupta , Sriram Murali , Karthik Ramasubramanian
Abstract: A FMCW radar receiver includes a LO providing a chirped LO signal, an in-phase (I) channel for outputting I-data and a quadrature (Q) channel for outputting Q-data. A dynamic correction parameter generator generates IQ phase correction values (P[n]s) and IQ gain correction values (G[n]s) based on a frequency slope rate of the chirped LO signal for generating during intervals of chirps including a first sequence of P[n]s and G[n]s during a first chirp and a second sequence of P[n]s and G[n]s during a second chirp. An IQ mismatch (IQMM) correction circuit has a first IQMM input coupled to receive the I-data and a second IQMM input receiving the Q-data, and the P[n]s and G[n]s. During the first chirp the IQMM correction circuit provides first Q′-data and first I′-data and during the second chirp the IQMM correction circuit provides at least second Q′-data and second I′-data.
-
公开(公告)号：US10067221B2
公开(公告)日：2018-09-04
申请号：US14679461
申请日：2015-04-06
Applicant: Texas Instruments Incorporated
Inventor： Brian Paul Ginsburg , Karthik Subburaj , Karthik Ramasubramanian , Sachin Bhardwaj , Sriram Murali , Sandeep Rao
Abstract: A frequency modulated continuous wave (FMCW) radar system is provided that includes a receiver configured to generate a digital intermediate frequency (IF) signal, and an interference monitoring component coupled to the receiver to receive the digital IF signal, in which the interference monitoring component is configured to monitor at least one sub-band in the digital IF signal for interference, in which the at least one sub-band does not include a radar signal.
-
公开(公告)号：US20180074168A1
公开(公告)日：2018-03-15
申请号：US14687617
申请日：2015-04-15
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Karthik Ramasubramanian , Sriram Murali , Sreekiran Samala , Krishnanshu Dandu
CPC classification number: G01S7/292 , G01S7/023 , G01S7/038 , G01S7/354 , G01S7/414 , G01S13/003 , G01S13/04 , G01S13/343 , G01S13/88 , G01S2007/356 , G01S2007/358
Abstract: A noise-mitigated continuous-wave frequency-modulated radar includes, for example, a transmitter for generating a radar signal, a receiver for receiving a reflected radar signal and comprising a mixer for generating a baseband signal in response to the received radar signal and in response to a local oscillator (LO) signal, and a signal shifter coupled to at least one of the transmitter, LO input of the mixer in the receiver and the baseband signal generated by the mixer. The impact of amplitude noise or phase noise associated with interferers, namely, for example, strong reflections from nearby objects, and electromagnetic coupling from transmit antenna to receive antenna, on the detection of other surrounding objects is reduced by configuring the signal shifter in response to an interferer frequency and phase offset.
-
Patent Agency Ranking
公开(公告)号：US20180038943A1
公开(公告)日：2018-02-08
申请号：US15229927
申请日：2016-08-05
Applicant: Texas Instruments Incorporated
Inventor： Karthik Ramasubramanian , Karthik Subburaj , Jasbir Singh Nayyar
CPC classification number: G01S7/4021 , G01S7/352 , G01S13/34 , G01S13/931 , G01S2007/358
Abstract: A radar system is provided that includes a receive channel including a complex baseband and a processor coupled to the receive channel to receive a first plurality of digital intermediate frequency (IF) samples from an in-band (I) channel of the complex baseband and a corresponding second plurality of digital IF samples from a quadrature (Q) channel of the complex baseband, wherein the processor is configured to execute instructions to compute at least one failure metric based on the first plurality of digital IF samples and the second plurality of digital IF samples.
-
公开(公告)号：US09753120B2
公开(公告)日：2017-09-05
申请号：US14521325
申请日：2014-10-22
Applicant: Texas Instruments Incorporated
Inventor： Karthik Ramasubramanian , Sandeep Rao
CPC classification number: G01S7/02 , G01S7/03 , G01S7/354 , G01S13/08 , G01S13/343 , G01S13/931 , G01S2007/356
Abstract: The disclosure provides a radar apparatus fur estimating a distance of the one or more obstacles in a range of interest. The radar apparatus includes a local oscillator that generates a first ramp segment having a first start frequency. A frequency shifter receives the first ramp segment and generates a transmit signal and a mixer signal. The transmit signal is scattered by a one or more obstacles in the range of interest to generate the scattered signal. A mixer mixes the scattered signal and the mixer signal to generate a non-zero IF signal which is filtered to generate a filtered non-zero IF signal. An ADC (analog to digital converter) samples the filtered non-zero IF signal to generate a valid data. A DSP (digital signal processor) processes the valid data for estimating the distance of the one or more obstacles.
-
公开(公告)号：US20170192847A1
公开(公告)日：2017-07-06
申请号：US14985851
申请日：2015-12-31
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Ramasubramanian , Brian Paul Ginsburg
CPC classification number: G06F11/1076 , G01S7/352 , G01S13/34 , G01S13/42 , G01S13/583 , G01S13/931 , G01S2007/356 , G06F3/0619 , G06F3/064 , G06F3/0673 , G06F11/1012
Abstract: Data memory protection is provided for a signal processing system such as a radar system in which the data memory is protected with a common set of parity bits rather than requiring a set of parity bits for each memory word as in Error Correction Coded (ECC) memories. The common set of parity bits may be updated as memory words in the data memory are accessed as part of signal processing of one or more digital signals. The memory protection ensures that in the absence of memory errors the common parity bits are zero at the end of processing the digital signals as long as each word in the data memory that is used for storing the signal processing data is written and read an equal number of times.
-
公开(公告)号：US09612338B2
公开(公告)日：2017-04-04
申请号：US14037052
申请日：2013-09-25
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Karthik Ramasubramanian , Jawaharlal Tangudu
CPC classification number: G01S19/24 , G01S19/246 , G01S19/25
Abstract: A method of acquiring a satellite signal in a GNSS receiver includes multiplying a received signal with a hypothesized doppler frequency signal to generate a frequency shifted signal. A PN code sequence signal is multiplied with the frequency shifted signal to generate a PN wiped signal. A windowing function signal is multiplied with the PN wiped signal to generate a windowed signal. The windowed signal is integrated coherently for a first predefined time to generate a coherent accumulated data.
-
公开(公告)号：US20170054449A1
公开(公告)日：2017-02-23
申请号：US15061728
申请日：2016-03-04
Applicant: Texas Instruments Incorporated
Inventor： Anil Mani , Sandeep Rao , Karthik Ramasubramanian
IPC: H03M7/24
CPC classification number: H03M7/24 , G01S7/295 , G01S7/352 , G01S13/18 , G01S13/34 , G01S13/343 , G01S13/584 , G01S13/931 , G01S2007/356 , H03M7/40 , H03M7/4031 , H03M7/4075
Abstract: A radar system is provided that includes a compression component configured to compress blocks of range values to generate compressed blocks of range values, and a radar data memory configured to store compressed blocks of range values generated by the compression component.
Abstract translation: 提供一种雷达系统，其包括被配置为压缩范围值的块以产生压缩的范围值的块的压缩部件，以及被配置为存储由压缩部件生成的压缩的范围值块的雷达数据存储器。
-
-
-
-
-
-
-
-
-
Search Results
105
records
(took 0.033 seconds)
