-
公开(公告)号：US10101438B2
公开(公告)日：2018-10-16
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
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.
-
公开(公告)号：US10094920B2
公开(公告)日：2018-10-09
申请号：US14470414
申请日：2014-08-27
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Subburaj , Brian Ginsburg , Karthik Ramasubramanian , Jawaharlal Tangudu , Sachin Bharadwaj
Abstract: The disclosure provides a radar apparatus for estimating a range of an obstacle. The radar apparatus includes a local oscillator that generates a first ramp segment and a second ramp segment. The first ramp segment and the second ramp segment each includes a start frequency, a first frequency and a second frequency. The first frequency of the second ramp segment is equal to or greater than the second frequency of the first ramp segment when a slope of the first ramp segment and a slope of the second ramp segment are equal and positive. The first frequency of the second ramp segment is equal to or less than the second frequency of the first ramp segment when the slope of the first ramp segment and the slope of the second ramp segment are equal and negative.
-
公开(公告)号：US09880261B2
公开(公告)日：2018-01-30
申请号：US14503181
申请日：2014-09-30
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Brian Ginsburg , Karthik Ramasubramanian
Abstract: The disclosure provides a radar apparatus for estimating a position and a velocity of a plurality of obstacles. The radar apparatus includes a slave radar chip. A master radar chip is coupled to the slave radar chip. The master radar chip includes a local oscillator that generates a transmit signal. The slave radar chip receives the transmit signal on a first path and sends the transmit signal back to the master radar chip on a second path. A delay detect circuit is coupled to the local oscillator and receives the transmit signal from the slave radar chip on the second path and the transmit signal from the local oscillator. The delay detect circuit estimates a routing delay from the transmit signal received from the slave radar chip on the second path and from the transmit signal received from the local oscillator.
-
公开(公告)号：US09733340B2
公开(公告)日：2017-08-15
申请号：US14550774
申请日：2014-11-21
Applicant: Texas Instruments Incorporated
Inventor： Sandeep Rao , Karthik Ramasubramanian , Brian Ginsburg , Jawaharlal Tangudu , Karthik Subburaj
CPC classification number: G01S7/032 , G01S13/343 , G01S13/931 , H01Q1/3233
Abstract: A device includes a circuit board having thereon, a controlling component, a first radar chip and a second radar chip. The first radar chip includes a first radar transmission antenna, a second radar transmission antenna and a first radar receiver antenna array. The second radar chip includes a second radar receiver antenna array. The controlling component can control the first radar chip and the second radar chip. The first radar transmission antenna can transmit a first radar transmission signal. The second radar transmission antenna can transmit a second radar transmission signal. The second radar chip is spaced from the first radar chip so as to create a virtual receiver antenna array between the first radar receiver antenna array and the second radar receiver antenna array.
-
公开(公告)号：US20170023663A1
公开(公告)日：2017-01-26
申请号：US14503181
申请日：2014-09-30
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Brian Ginsburg , Karthik Ramasubramanian
Abstract: The disclosure provides a radar apparatus for estimating a position and a velocity of a plurality of obstacles. The radar apparatus includes a slave radar chip. A master radar chip is coupled to the slave radar chip. The master radar chip includes a local oscillator that generates a transmit signal. The slave radar chip receives the transmit signal on a first path and sends the transmit signal back to the master radar chip on a second path. A delay detect circuit is coupled to the local oscillator and receives the transmit signal from the slave radar chip on the second path and the transmit signal from the local oscillator. The delay detect circuit estimates a routing delay from the transmit signal received from the slave radar chip on the second path and from the transmit signal received from the local oscillator.
Abstract translation: 本公开提供了一种用于估计多个障碍物的位置和速度的雷达装置。 雷达装置包括从属雷达芯片。 主雷达芯片耦合到从属雷达芯片。 主雷达芯片包括产生发射信号的本地振荡器。 从属雷达芯片在第一路径上接收发射信号，并将发射信号发送回第二路径上的主雷达芯片。 延迟检测电路耦合到本地振荡器，并从第二路径上的从属雷达芯片接收发射信号和来自本地振荡器的发射信号。 延迟检测电路从从第二路径上的从雷达芯片接收的发送信号和从本地振荡器接收的发送信号估计路由延迟。
-
Patent Agency Ranking
36.发明申请公开(公告)号：US20150295569A1
公开(公告)日：2015-10-15
申请号：US14250880
申请日：2014-04-11
Applicant: Texas Instruments Incorporated
Inventor： Aswin Srinivasa Rao , Anand Kudari , Karthik Subburaj
IPC: H03K7/06
CPC classification number: H03K7/06 , H04L27/10 , H04L27/12 , H04L27/127
Abstract: Binary frequency shift keying modulation is implemented by choosing appropriate phases of a high frequency clock to generate a modulated intermediate clock frequency. The high frequency clock is chosen to be (M+0.5)*fc, where fc is the carrier frequency and M is an integer. Depending on the binary data ‘1’ or ‘0’ to be transmitted, ‘M’ or ‘M+1’ clock phases from the high frequency clock are converted to an intermediate clock that is 2*N times faster than the carrier frequency, where N is an integer. This intermediate clock, generated entirely in the digital domain, has the required data modulation in it, and is used to generate N pulse width modulated (PWM) phases of waveforms operating at the carrier frequency. The N phases are then weighed appropriately to synthesize a sine waveform whose lower harmonics are substantially suppressed.
Abstract translation: 通过选择高频时钟的适当相位来产生调制中间时钟频率来实现二进制频移键控调制。 高频时钟选择为（M + 0.5）* fc，其中fc是载波频率，M是整数。 根据要发送的二进制数据'1'或'0'，来自高频时钟的“M”或“M + 1”个时钟相位被转换为比载波频率快2倍N倍的中间时钟， 其中N是整数。 该完全在数字域中产生的中间时钟在其中具有所需的数据调制，并用于产生以载波频率工作的N个脉宽调制（PWM）相位。 然后适当地称重N相，以合成基本上抑制其低次谐波的正弦波形。
-
公开(公告)号：US20150276918A1
公开(公告)日：2015-10-01
申请号：US14637218
申请日：2015-03-03
Applicant: Texas Instruments Incorporated
Inventor： Karthik Ramasubramanian , Karthik Subburaj , Sachin Bhardwaj
CPC classification number: G01S7/35 , G01S13/343 , G01S13/584 , G01S13/726 , G01S13/931 , G01S2013/0245
Abstract: The disclosure provides a radar apparatus for estimating a position and a velocity of the plurality of obstacles. The radar apparatus includes a local oscillator that generates a first signal. A first transmit unit receives the first signal from the local oscillator and generates a first transmit signal. A frequency shifter receives the first signal from the local oscillator and generates a second signal. A second transmit unit receives the second signal and generates a second transmit signal. The frequency shifter provides a frequency offset to the first signal based on a routing delay mismatch to generate the second signal such that the first transmit signal is phase coherent with the second transmit signal.
Abstract translation: 本公开提供了一种用于估计多个障碍物的位置和速度的雷达装置。 雷达装置包括产生第一信号的本地振荡器。 第一发送单元从本地振荡器接收第一信号并产生第一发送信号。 频移器从本地振荡器接收第一信号并产生第二信号。 第二发送单元接收第二信号并产生第二发送信号。 移频器基于路由延迟失配向第一信号提供频率偏移以产生第二信号，使得第一发射信号与第二发射信号相位相干。
-
公开(公告)号：US12228680B2
公开(公告)日：2025-02-18
申请号：US17862738
申请日：2022-07-12
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Shankar Narayanamoorthy , Karthik Ramasubramanian , Anand Gadiyar , Dheeraj Kumar Shetty , Shailesh Joshi
IPC: G01S7/40
Abstract: Methods, apparatus, systems and articles of manufacture to compensate radar system calibration are disclosed. A radio-frequency (RF) subsystem having a transmit channel, a receive channel, and a loopback path comprising at least a portion of the transmit channel and at least a portion of the receive channel, a loopback measurer to measure a first loopback response of the RF subsystem for a first calibration configuration of the RF subsystem, and to measure a second loopback response of the RF subsystem for a second calibration configuration of the RF subsystem, and a compensator to adjust at least one of a transmit programmable shifter or a digital front end based on a difference between the first loopback response and the second loopback response to compensate for a loopback response change when the RF subsystem is changed from the first calibration configuration to the second calibration configuration.
-
公开(公告)号：US12078749B2
公开(公告)日：2024-09-03
申请号：US18181938
申请日：2023-03-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Karthik Subburaj , Vashishth Dudhia , Shailesh Joshi
CPC classification number: G01S7/40 , G01S7/352 , G01S7/4021 , G01S7/4073 , G01S13/341 , G01S7/4017
Abstract: An example radar device includes an antenna system, a transmitter having an input, and an output coupled to an input of the antenna system, the transmitter having modulation circuitry to provide frequency modulated continuous wave (FMCW) signals for transmission by the antenna system; a receive signal processing chain; and a digital front-end. The receive signal processing chain includes an input coupled to an output of the antenna system, and is configured to receive radar reflection signals, process the radar reflected signals to generate an intermediate frequency (IF) baseband signal, and digitize the IF baseband signal to generate digital samples of the IF baseband signal. The digital front-end has an input to receive the digital samples of the IF baseband signal and to phase-shift the digital samples in response to a calibration signal.
-
公开(公告)号：US11899129B2
公开(公告)日：2024-02-13
申请号：US17989401
申请日：2022-11-17
Applicant: Texas Instruments Incorporated
Inventor： Karthik Subburaj , Zahir Ibrahim Parkar , Krishnanshu Dandu , Vashishth Dudhia
CPC classification number: G01S7/4056 , G01S7/352 , G01S13/34 , G01S7/356
Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to test RADAR integrated circuits. A radar circuit comprising a local oscillator (LO), a transmitter coupled to the LO and configured to be coupled to a transmission network, a receiver configured to be coupled to the transmission network, and a controller coupled to the LO, the transmitter, and the receiver, the controller to cause the LO to generate a frequency modulated continuous waveform (FMCW), cause the transmitter to modulate the FMCW as a modulated FMCW, cause the transmitter to transmit the modulated FMCW via the transmission network and the receiver to obtain a received FMCW from the transmission network, and in response to obtaining the received FMCW from the receiver, generate a performance characteristic of the radar circuit based on the received FMCW.
-
-
-
-
-
-
-
-
-
Search Results
109
records
(took 0.024 seconds)
