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公开(公告)号：US20250024387A1
公开(公告)日：2025-01-16
申请号：US18796065
申请日：2024-08-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Ganesh Dabak , Eko Nugroho Onggonsanusi , Badri Varadarajan
Abstract: Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.
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公开(公告)号：US12038522B2
公开(公告)日：2024-07-16
申请号：US17522732
申请日：2021-11-09
Applicant: Texas Instruments Incorporated
Inventor： Borja Martinez Huerta , Guillem Boquet Pujadas , Xavier Vilajosana Guillen , Anand Ganesh Dabak , Kaichien Tsai , Jianwei Zhou , Danil Shalumov
CPC classification number: G01S5/0244 , G01S5/04 , H04W64/00
Abstract: In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.
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公开(公告)号：US20200225345A1
公开(公告)日：2020-07-16
申请号：US16426779
申请日：2019-05-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： LEI DING , Srinath Mathur Ramaswamy , Anand Gopalan , Vaibhav Garg , Anand Ganesh Dabak
Abstract: Ultrasonic ranging systems and methods that use coding to distinguish emitted bursts from multiple transducers temporally stagger the bursts emitted from the transducers. The stagger delay between bursts from different transducers in a sensing frame can be randomized between different sensing frames to prevent blind zones. The stagger delay can be relatively small (e.g., between 3 ms and 10 ms) as compared to delays required between bursts in a single-tone ranging system (which would need to be more on the order of between 30 ms and 40 ms, depending on the maximum detecting range of the ranging system). The coding of bursts can be selected to utilize the entire bandwidth of the bursting transducer so as to preserve short-range sensitivity over transducer ringing. Schemes in which some transducers in a system only listen for bursts from other transducers but do not themselves burst within a sensing frame are also described.
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公开(公告)号：US10341969B2
公开(公告)日：2019-07-02
申请号：US15672160
申请日：2017-08-08
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Ganesh Dabak , Eko Nugroho Onggosanusi , Badri Varadarajan
Abstract: Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.
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公开(公告)号：US09332515B2
公开(公告)日：2016-05-03
申请号：US14874330
申请日：2015-10-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Ganesh Dabak , Eko Nugroho Onggosanusi , Badri Varadarajan
CPC classification number: H04W56/001 , H04B7/2681 , H04W36/0016 , H04W36/0072
Abstract: Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.
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Patent Agency Ranking
公开(公告)号：US08995580B2
公开(公告)日：2015-03-31
申请号：US14289223
申请日：2014-05-28
Applicant: Texas Instruments Incorporated
Inventor： Badri N. Varadarajan , Anand Ganesh Dabak , Tarkesh Pande , Eko N. Onggosanusi
CPC classification number: H04L5/0048 , H04B1/04 , H04L23/02 , H04L25/0202 , H04L27/2607 , H04L27/2613 , H04L27/2649
Abstract: In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence.
Abstract translation: 在一个实施例中，发射机包括被配置为提供参考信号比特序列的二进制序列发生器单元，其中该序列是小区识别参数的不可分离的功能，对应于发射机的循环前缀模式和一个或多个时间指数 序列。 发射机还包括将参考信号比特序列变换为复参考信号的映射单元，以及配置成发送复基准信号的发射单元。 在另一实施例中，接收机包括被配置为接收复参考信号的接收单元和被配置为从复参考信号检测参考信号位序列的参考信号解码器单元，其中该序列是小区识别参数的不可分离的函数 ，对应于发射机的循环前缀模式和序列的一个或多个时间索引。
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公开(公告)号：US20240411017A1
公开(公告)日：2024-12-12
申请号：US18393905
申请日：2023-12-22
Applicant: Texas Instruments Incorporated
Inventor： LEI DING , Srinath Mathur Ramaswamy , Anand Gopalan , Vaibhav Garg , Anand Ganesh Dabak
IPC: G01S15/10 , G01S7/526 , G01S15/931
Abstract: In one example, a method comprises using a first transducer, emitting a first acoustic signal representing a first code. The method further comprises using the first transducer, receiving a second acoustic signal, and converting the second acoustic signal to a sensor signal. The method further comprises computing a time-of-flight for the second acoustic signal based on a time difference between when the first transducer emits the first acoustic signal and when the first transducer receives the second acoustic signal. The method further comprises responsive to the correlation result indicating that the third acoustic signal is a reflection of a third acoustic signal emitted by a second transducer: determining a delay time between when the first transducer emits the first acoustic signal and when the second transducer emits the third acoustic signal; adjusting the time-of-flight based on the delay time; and providing a distance measurement based on the adjusted time-of-flight.
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公开(公告)号：US11855810B2
公开(公告)日：2023-12-26
申请号：US17504144
申请日：2021-10-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yaron Alpert , Matan Ben-Shachar , Anand Ganesh Dabak
CPC classification number: H04L25/0202 , H04B7/0626 , H04L27/2601 , H04W84/12
Abstract: A user client device with a single receive (RX) chain, a first antenna and a second antenna, and a processor that causes the user client device to couple the single RX chain to the first antenna to receive a first data packet on a first channel and determine a first channel state information (CSI) tile of the first channel based on one or more fields in the first data packet, decouple the first antenna from the single RX chain and couple the second antenna to the single RX chain to continue receiving the first data packet on a second channel, determine a second CSI tile of the second channel based on one or more of a portion of the first plurality of fields, aggregate the first CSI tile with the second CSI tile, and generate a CSI matrix based on aggregating the first CSI tile with the second CSI tile.
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公开(公告)号：US20230296714A1
公开(公告)日：2023-09-21
申请号：US17696338
申请日：2022-03-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yaron Alpert , Matan Ben-Shachar , Anand Ganesh Dabak , Brian Ginsburg
CPC classification number: G01S1/045 , G01S19/254 , G01S19/30
Abstract: One example includes a passive radar receiver system including an RF receiver front-end to receive a wireless source signal and a reflected signal. An antenna switch of the front-end switches a first antenna to a receiver chain during a first time to generate first radar signal data based on a combined wireless signal comprising wireless source signal and the reflected signal, and switches a second antenna to the receiver chain during a second time to generate second radar signal data based on the combined wireless signal. A signal processor generates source signal data associated with the wireless source signal based on the first and second radar signal data and generates reflected signal data associated with the reflected signal based on the first and second radar signal data, and generates target radar data associated with a target based on the source and reflected radar signal data.
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公开(公告)号：US10979277B1
公开(公告)日：2021-04-13
申请号：US16731823
申请日：2019-12-31
Applicant: Texas Instruments Incorporated
Inventor： Timothy Mark Schmidl , Swaminathan Sankaran , Gerd Schuppener , Salvatore Luciano Finocchiaro , Siraj Akhtar , Tolga Dinc , Anand Ganesh Dabak , Baher Haroun
Abstract: In described examples, a method of operating a transmitter includes generating a frequency reference signal having a reference frequency and outputting the frequency reference to a phase locked loop (PLL) that includes a voltage controlled oscillator (VCO). The VCO output is locked to the frequency reference signal to form a carrier signal. The transmitter receives an I input signal, a Q input signal, and a direct current (DC) leaky carrier signal. Either the I input signal or the Q input signal is added to the leaky carrier signal. The carrier signal is modulated with the resulting two signals using an I-Q mixer to generate a modulated signal that includes an unmodulated carrier signal component. The modulated signal is then transmitted.
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