公开(公告)号：US20150146823A1

公开(公告)日：2015-05-28

申请号：US14294879

申请日：2014-06-03

Applicant: Texas Instruments Incorporated

Inventor： Wenxun Qiu ,  Timothy Mark Schmidl ,  Minghua Fu ,  Anuj Batra

IPC: H03G3/30 ,  H04L27/144

CPC classification number: H04B1/123 ,  H03G3/3078 ,  H03G3/3089 ,  H03M3/042 ,  H04B7/0811 ,  H04B17/20 ,  H04L27/14

Abstract: A wireless network receiver includes a detection module that uses preamble data in a data frame for signal processing functions and the detection module is configured to adjust the number of preamble data bits that are used based on the power of a received signal.

Abstract translation: 无线网络接收机包括检测模块，该检测模块使用用于信号处理功能的数据帧中的前导码数据，并且检测模块被配置为基于接收到的信号的功率来调整所使用的前导码数据位的数量。

公开(公告)号：US08964916B2

公开(公告)日：2015-02-24

申请号：US14145431

申请日：2013-12-31

Applicant: Texas Instruments Incorporated

Inventor： Reza Hoshyar ,  Anuj Batra ,  Timothy Mark Schmidl

IPC: H04B1/10 ,  H04L27/26 ,  H04B17/00

CPC classification number: H04L27/2647 ,  H04B17/336

Abstract: An orthogonal frequency-division multiplexed (OFDM)-based receiver for channel tracking with signal-to-noise ratio dependent parameters that includes a memory; and a signal processor, coupled to the memory. The signal processor to estimate a signal-to-noise ratio (SNR) for a received packet of OFDM symbols and determine an SNR region in which the SNR estimate falls, wherein the signal processor implements a different set of finite impulse response (FIR) filter coefficients for each SNR region.

Abstract translation: 一种用于信道跟踪的基于正交频分复用（OFDM）的接收机，其具有包括存储器的信噪比相关参数; 以及耦合到存储器的信号处理器。 信号处理器，用于估计接收到的OFDM符号分组的信噪比（SNR），并确定SNR估计下降的SNR区域，其中信号处理器实现不同的一组有限脉冲响应（FIR）滤波器 每个SNR区域的系数。

公开(公告)号：US11736144B2

公开(公告)日：2023-08-22

申请号：US17096886

申请日：2020-11-12

Applicant: Texas Instruments Incorporated

Inventor： Anand Dabak ,  Mahmoud Abdelmoneim Abdelmoneim Elgenedy ,  Timothy Mark Schmidl ,  Swaminathan Sankaran

IPC: H04B3/32 ,  H04L25/03

CPC classification number: H04B3/32 ,  H04L25/03057

Abstract: In described examples of a signal equalizer, a first filter stage is configured to perform adaptive equalization of crosstalk between a first signal component and a second signal component of a complex signal. A second filter stage is coupled serially to the first filter stage. The second equalizer stage is configured to perform separate adaptive equalization of the first signal component and separate adaptive equalization of the second signal component.

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

IPC: H04L27/38 ,  H04L25/03 ,  H04B7/005 ,  H03L7/191 ,  H03B5/32 ,  H03L7/087

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.

公开(公告)号：US09853844B2

公开(公告)日：2017-12-26

申请号：US15656039

申请日：2017-07-21

Applicant: Texas Instruments Incorporated

Inventor： Wenxun Qiu ,  Timothy Mark Schmidl

IPC: H03D3/00 ,  H04L27/16 ,  H04L27/14

CPC classification number: H04L27/16 ,  H04L27/14

Abstract: Disclosed embodiments include a receiver having an input that receives a frequency shift key (FSK) signal having a preamble comprising preamble symbols, a phase compensator that applies a compensation vector to one of first and second samples of a first preamble symbol, wherein applying the compensation vector to the one of the first and second samples produces a compensated sample, a demodulator that determines a phase offset between the compensated sample and the other one of the first and second samples of the first preamble symbol, and a frequency offset mapper that determines a frequency offset based at least upon the phase offset. The receiver applies the frequency offset to the FSK signal.

公开(公告)号：US20170245275A1

公开(公告)日：2017-08-24

申请号：US15048843

申请日：2016-02-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Timothy Mark Schmidl ,  Ariton Xhafa ,  Arvind Khandalu Raghu

IPC: H04W72/04 ,  H04W24/08

CPC classification number: H04W72/0453 ,  H04W24/08 ,  H04W72/0406 ,  H04W72/0433

Abstract: A method of operating a network on a plurality of frequency hopping channels is disclosed. The method includes transmitting a beacon on a beacon channel different from the frequency hopping channels and receiving a request from a node to join the network in response to the beacon. The method further includes adding the node to the network in response to the step of receiving and communicating with the node on the plurality of frequency hopping channels after the step of adding.

公开(公告)号：US09722833B2

公开(公告)日：2017-08-01

申请号：US15003181

申请日：2016-01-21

Applicant: Texas Instruments Incorporated

Inventor： Wenxun Qiu ,  Timothy Mark Schmidl

IPC: H04L27/14 ,  H04L27/16

CPC classification number: H04L27/16 ,  H04L27/14

Abstract: A frequency shift key (FSK) receiver includes a phase compensator for compensating for frequency differences in a transmitter that transmits a FSK signal to the receiver. The phase compensating is performed before the FSK signal is demodulated by the receiver.

公开(公告)号：US20160191111A1

公开(公告)日：2016-06-30

申请号：US15066549

申请日：2016-03-10

Applicant: Texas Instruments Incorporated

Inventor： Timothy Mark Schmidl ,  Anand G. Dabak

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B1/7085 ,  H04L5/0048 ,  H04L27/22

Abstract: A method of operating a transmitter (FIGS. 3A and 5A) is disclosed. The method includes receiving a sequence of data bits (DATA), wherein each data bit has a respective sequence number. A first data bit of the sequence is spread (508) with a first spreading code (504) determined by the sequence number (502) of the first data bit. A second data bit of the sequence is spread (508) with an inverse of the first spreading code (506) determined by the sequence number (502) of the second data bit. The first and second data bits are modulated (510) and transmitted (516) to a remote receiver.

Abstract translation: 公开了一种操作发射机的方法（图3A和5A）。 该方法包括接收数据位序列（DATA），其中每个数据位具有相应的序列号。 序列的第一数据位由第一数据位的序列号（502）确定的第一扩展码（504）进行扩展（508）。 该序列的第二数据位以由第二数据位的序列号（502）确定的第一扩展码（506）的倒数进行扩展（508）。 第一和第二数据位被调制（510）并传输（516）到远程接收器。

公开(公告)号：US20160087754A1

公开(公告)日：2016-03-24

申请号：US14952406

申请日：2015-11-25

Applicant: Texas Instruments Incorporated

Inventor： Yumin Zhang ,  Wenxun Qiu ,  Timothy Mark Schmidl ,  Anuj Batra

IPC: H04L1/00 ,  G06F11/10 ,  H04L29/06

CPC classification number: H04L1/0041 ,  G06F11/0709 ,  G06F11/1004 ,  G06F11/1402 ,  H03M13/09 ,  H04L1/0045 ,  H04L1/0053 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0075 ,  H04L1/0079 ,  H04L1/0083 ,  H04L69/22

Abstract: A networking device includes a packet header protect generator, a transmitter, a receiver, a decoder and router. The transmitter transmits a data packet to the receiver. The data packet includes a data packet header. The packet header protection generator is arranged to toggle selected bits of a protected portion of the data packet header and generate a data integrity signature. The receiver receives the data packet and generates a received data integrity signature. The decoder computes a locally computed data integrity signature in response to the protected portion of the received data packet header. The locally computed data integrity signature is compared with the received data integrity signature. The router selects a portion of a routing path in response to whether a data packet forwarding destination includes a decoder arranged to compute a locally computed data integrity signature.

Abstract translation: 网络设备包括分组报头保护发生器，发射机，接收机，解码器和路由器。 发射机向接收机发送数据包。 数据分组包括数据分组报头。 分组报头保护发生器被布置为切换数据分组报头的受保护部分的所选位，并生成数据完整性签名。 接收器接收数据包并产生接收到的数据完整性签名。 解码器响应于接收到的数据分组报头的受保护部分来计算本地计算的数据完整性签名。 将本地计算的数据完整性签名与接收到的数据完整性签名进行比较。 响应于数据分组转发目的地是否包括被布置为计算本地计算的数据完整性签名的解码器，路由器选择路由路径的一部分。

公开(公告)号：US20150256217A1

公开(公告)日：2015-09-10

申请号：US14719405

申请日：2015-05-22

Applicant: Texas Instruments Incorporated

Inventor： Timothy Mark Schmidl ,  Anand G. Dabak

IPC: H04B1/707 ,  H04L27/22

CPC classification number: H04B1/707 ,  H04B1/7085 ,  H04L5/0048 ,  H04L27/22

Abstract: A method of operating a transmitter (FIGS. 3A and 5A) is disclosed. The method includes receiving a sequence of data bits (DATA), wherein each data bit has a respective sequence number. A first data bit of the sequence is spread (508) with a first spreading code (504) determined by the sequence number (502) of the first data bit. A second data bit of the sequence is spread (508) with an inverse of the first spreading code (506) determined by the sequence number (502) of the second data bit. The first and second data bits are modulated (510) and transmitted (516) to a remote receiver.

Abstract translation: 公开了一种操作发射机的方法（图3A和5A）。 该方法包括接收数据位序列（DATA），其中每个数据位具有相应的序列号。 序列的第一数据位由第一数据位的序列号（502）确定的第一扩展码（504）进行扩展（508）。 该序列的第二数据位以由第二数据位的序列号（502）确定的第一扩展码（506）的倒数进行扩展（508）。 第一和第二数据位被调制（510）并传输（516）到远程接收器。