公开(公告)号：US09872130B2

公开(公告)日：2018-01-16

申请号：US15298829

申请日：2016-10-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC: H04J1/00 ,  H04W4/00 ,  H04L27/18 ,  H04L27/20 ,  H04L29/06 ,  H04L27/26 ,  H04W52/36

CPC classification number: H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions.

公开(公告)号：US09510138B2

公开(公告)日：2016-11-29

申请号：US14709549

申请日：2015-05-12

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC: H04W4/00 ,  H04L27/18 ,  H04L27/20 ,  H04L29/06 ,  H04L27/26

CPC classification number: H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.

Abstract translation: 在至少一些实施例中，通信设备包括具有物理（PHY）层的收发器。 基于用于BAN分组传输的恒定符号速率并且基于M-ary PSK，差分M-ary PSK或旋转差分M-ary PSK调制，PHY层被配置用于在有限多径环境中的体区域网络（BAN）操作。 PHY层被配置为从选自以下的频带发送和接收数据：402-405MHz，420-450MHz，863-870MHz，902-928MHz，950-956MHz，2360-2400MHz ，和2400-2483.5MHz。

公开(公告)号：US09438304B2

公开(公告)日：2016-09-06

申请号：US14825714

申请日：2015-08-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： June Chul Roh ,  Anuj Batra ,  Sudipto Chakraborty ,  Srinath Hosur

IPC: H04B1/00 ,  H04B1/69 ,  H04B1/7176

CPC classification number: H04B1/69 ,  H04B1/7176 ,  H04B2001/6908

Abstract: A symbol modulation system applicable to a body area network is disclosed herein. The symbol modulation system includes a symbol mapper. The symbol mapper is configured to determine a time within a predetermined symbol transmission interval at which a transmission representative of the symbol will occur. The time is determined based on a value of a symbol and a value of a time-hopping sequence. The time is selected from a plurality of symbol value based time slots, and a plurality of time-hopping sequence sub-time-slots within each symbol value based time slot. The symbol mapper is configured to generate a single guard interval within the symbol transmission interval. The single guard interval is positioned to terminate the symbol transmission interval.

公开(公告)号：US20160239063A1

公开(公告)日：2016-08-18

申请号：US15063001

申请日：2016-03-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Deric W. Waters ,  Srinath Hosur ,  Anand Dabak

IPC: G06F1/26

CPC classification number: G06F1/266 ,  G06F1/263 ,  G06F1/32

Abstract: A VBUS conductor is checked to determine whether a voltage on the VBUS conductor is greater than a vSafe0V voltage within a detect time interval. A device policy manager applies a vSafeDB voltage to the VBUS conductor when the voltage on the VBUS conductor is greater than the vSafe0V voltage. The policy engine waits for a bit stream to be detected within a timer interval. When the bit stream is not detected within the timer interval, the device policy manager is instructed to apply the vSafe0V voltage to the VBUS conductor. The device policy manager applies a vSafe5V voltage to the VBUS conductor when the bit stream is detected, and the policy engine waits for the bit stream to stop within a device ready timer interval. When the bit stream has stopped within the device ready timer interval, the policy engine sends capabilities as a source port.

Abstract translation: 检查VBUS导体以确定VBUS导体中的电压是否大于检测时间间隔内的vSafe0V电压。 当VBUS导体上的电压大于vSafe0V电压时，器件策略管理器将vSafeDB电压施加到VBUS导体。 策略引擎等待在定时器间隔内检测到位流。 当在定时器间隔内未检测到比特流时，指示设备策略管理器将vSafe0V电压应用于VBUS导体。 当检测到位流时，设备策略管理器将vSafe5V电压施加到VBUS导体，并且策略引擎等待位流在设备就绪定时器间隔内停止。 当位流在设备就绪定时器间隔内停止时，策略引擎将功能作为源端口发送。

公开(公告)号：US20160044697A1

公开(公告)日：2016-02-11

申请号：US14920625

申请日：2015-10-22

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Soon-Hyeok Choi ,  Srinath Hosur ,  Yanjun Sun

IPC: H04W72/12 ,  H04W4/00

CPC classification number: H04W72/1215 ,  H04W4/80 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

Abstract: A method for communicating in a wireless sensor network (WSN) is described. Using control logic, a first wireless transceiver is caused to transmit a wireless packet to a node in a wireless sensor network. The control logic bases its causing on a transmission coinciding with a break in transmission for a second wireless network, such that the transmission from the first wireless transceiver does not coincide with transmissions made on the second wireless network. Time synchronized channel hopping (TSCH) slot frames for wireless packet transmission in the wireless sensor network are caused to be time offset if the first wireless transceiver is utilizing TSCH. Wake up sequence transmissions for the wireless sensor network are caused to be time offset if the first wireless transceiver is utilizing coordinated sampled listening (CSL).

Abstract translation: 描述了在无线传感器网络（WSN）中进行通信的方法。 使用控制逻辑，使第一无线收发器将无线分组传送到无线传感器网络中的节点。 控制逻辑基于其导致与第二无线网络的传输中断一致的传输，使得来自第一无线收发器的传输与在第二无线网络上进行的传输不一致。 如果第一无线收发器正在使用TSCH，则使无线传感器网络中的无线分组传输的时间同步信道跳频（TSCH）时隙帧被时间偏移。 无线传感器网络的唤醒序列传输如果第一个无线收发器正在利用协调的采样监听（CSL），则会导致时间偏移。

公开(公告)号：US09258107B1

公开(公告)日：2016-02-09

申请号：US14580595

申请日：2014-12-23

Applicant: Texas Instruments Incorporated

Inventor： Nirmal C. Warke ,  Lars Morten Jorgensen ,  Srinath Hosur

IPC: H04L7/00 ,  H04L7/02

CPC classification number: H04L27/0014 ,  H04L2027/0053 ,  H04L2027/0093

Abstract: A system and method for tracking noise in a received signal uses a forward/backward Decision-Directed Phase Tracking Loop to generate a phase-noise compensation signal that removes phase noise from received single-carrier signals.

Abstract translation: 用于在接收信号中跟踪噪声的系统和方法使用前向/后向决策定向相位循环来产生从接收的单载波信号中去除相位噪声的相位噪声补偿信号。

公开(公告)号：US20150092886A1

公开(公告)日：2015-04-02

申请号：US14503513

申请日：2014-10-01

Applicant: Texas Instruments Incorporated

Inventor： Corina Ioana Ionita ,  June Chul Roh ,  Mohamed F. Mansour ,  Srinath Hosur

IPC: H04L27/36

CPC classification number: H03M5/18 ,  H03M13/13 ,  H03M13/152 ,  H03M13/251 ,  H03M13/255 ,  H03M13/2792 ,  H04L1/0041 ,  H04L1/0058 ,  H04L25/4917 ,  H04L27/36 ,  H04L27/364

Abstract: A method includes simulating transmission of multiple symbols representing multiple bits over at least one communication channel, where the multiple symbols are associated with a polar code. The method also includes identifying error rates of equivalent bit channels associated with the simulated transmission of the symbols. The method further includes selecting a specified number of the bits as frozen bits in the polar code using the identified error rates. Simulating the transmission of the symbols could include computing log likelihood ratio (LLR) values associated with the equivalent bit channels and simulating polar decoding of received symbols using the LLR values. Identifying the error rates could include calculating means and variances of the LLR values associated with the equivalent bit channels and identifying probability density functions of the LLR values using the means and variances. The selected bits could represent the specified number of bits identified as having worst error rates.

Abstract translation: 一种方法包括模拟通过至少一个通信信道表示多个比特的多个符号的传输，其中多个符号与极性码相关联。 该方法还包括识别与符号的模拟传输相关联的等效比特信道的错误率。 该方法还包括使用所识别的错误率在极性码中选择指定数目的比特作为冻结比特。 模拟符号的传输可以包括与等效比特信道相关联的计算对数似然比（LLR）值，并且使用LLR值来模拟接收符号的极性解码。 识别错误率可以包括与等效位信道相关联的LLR值的计算方法和方差，并使用均值和方差来识别LLR值的概率密度函数。 所选择的比特可以表示指定的具有最差错误率的比特数。

公开(公告)号：US20150091742A1

公开(公告)日：2015-04-02

申请号：US14503547

申请日：2014-10-01

Applicant: Texas Instruments Incorporated

Inventor： Corina Ioana Ionita ,  June Chul Roh ,  Mohamed F. Mansour ,  Srinath Hosur

IPC: H03M5/18 ,  H03M13/00

CPC classification number: H03M5/18 ,  H03M13/13 ,  H03M13/152 ,  H03M13/251 ,  H03M13/255 ,  H04L1/0041 ,  H04L1/0058 ,  H04L25/4917 ,  H04L27/36 ,  H04L27/364

Abstract: A method includes receiving multiple bits to be transmitted. The method also includes applying a first binary alphabet polar code to a first subset of the multiple bits to generate first encoded bits. The first encoded bits are associated with a first bit level of a multilevel coding scheme. The method further includes generating one or more symbols using the first encoded bits and bits associated with a second bit level of the multilevel coding scheme. The first binary alphabet polar code is associated with a first coding rate. In addition, the method could include applying a second binary alphabet polar code to a second subset of the multiple bits to generate second encoded bits. The second encoded bits are associated with the second bit level. The second binary alphabet polar code is associated with a second coding rate such that the bit levels have substantially equal error rates.

Abstract translation: 一种方法包括接收要发送的多个比特。 该方法还包括将第一二进制字母极性码应用于多个比特的第一子集以产生第一编码比特。 第一编码比特与多级编码方案的第一比特级相关联。 该方法还包括使用与多级编码方案的第二比特级相关联的第一编码比特和比特生成一个或多个符号。 第一个二进制字母极性码与第一编码率相关联。 此外，该方法可以包括将第二二进制字母极性码应用于多个比特的第二子集以产生第二编码比特。 第二编码比特与第二比特级相关联。 第二二进制字母极性码与第二编码率相关联，使得位电平具有基本相等的误码率。

公开(公告)号：US20140079162A1

公开(公告)日：2014-03-20

申请号：US14030338

申请日：2013-09-18

Applicant: Texas Instruments Incorporated

Inventor： Mohamed Farouk Mansour ,  Srinath Hosur ,  JuneChul Roh

IPC: H04L1/00

CPC classification number: H04L1/0054 ,  H04L27/3405 ,  H04L27/38

Abstract: Embodiments of the invention provide a method of decoding of hexagonal constellations. The decoding methods exploit the inherent structure of the hexagonal grid to eliminate/minimize the requirements for distance computations. A constellation which has unused constellation points is received. A plurality of lookup tables is used for indicating whether a particular constellation point is used. The lookup tables are indexed using the two integers u and v. An initial estimate of u and v is found. The euclidean distance to an immediate four neighbors resulting in the immediate upper and lower integers for ū and v. The upper or lower integer that corresponds to the smalling distance is selected and all other immediate neighbors are computed. Assignment of constellation points on the hexagonal grid for a given constellation size is provided which exploits the inherent redundancy provided by the hexagonal grid. Assignment of codewords to the available constellation points to minimize the Hamming distance between adjacent codewords is also provided.

Abstract translation: 本发明的实施例提供了一种对六角形星座进行解码的方法。 解码方法利用六角网格的固有结构来消除/最小化距离计算的要求。 接收到具有未使用的星座点的星座。 多个查找表用于指示是否使用特定的星座点。 查找表使用两个整数u和v进行索引，找到u和v的初始估计。 欧几里德到立即四个邻居的距离，导致ū和v的立即上下整数。选择与小距离对应的上或下整数，并计算所有其他直接邻居。 提供给定星座大小的六边形网格上的星座点的分配，其利用由六边形网格提供的固有冗余。 还提供了将码字分配给可用的星座点以最小化相邻码字之间的汉明距离。

公开(公告)号：US20130259016A1

公开(公告)日：2013-10-03

申请号：US13852174

申请日：2013-03-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ariton E. Xhafa ,  Soon-Hyeok Choi ,  Srinath Hosur ,  Yanjun Sun

IPC: H04W84/18

CPC classification number: H04W72/1215 ,  H04W4/80 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

Abstract: A wireless device includes a wireless transceiver configured to transmit to and receive from nodes in a wireless sensor network (WSN) and control logic coupled to the first wireless transceiver. The wireless transceiver transmits a wireless packet to a node in the WSN based on the transmission coinciding with a break in transmissions for a second wireless network. Based on the wireless transceiver being configured to transmit the wireless packets utilizing time synchronized channel hopping, slot frames for packet transmissions in the WSN are time offset so as not to coincide with transmissions made on the second wireless network. Based on the wireless transceiver being configured to transmit the packets utilizing coordinated sampled listening, wake up sequence transmissions for the WSN are time offset so as not to coincide with the transmissions made on the second wireless network.

Abstract translation: 无线设备包括被配置为向无线传感器网络（WSN）中的节点传送和从其接收的无线收发机以及耦合到第一无线收发器的控制逻辑。 无线收发器基于与第二无线网络的传输中断一致的传输将无线分组传送到WSN中的节点。 基于无线收发器被配置为使用时间同步信道跳频发送无线分组，用于WSN中的分组传输的时隙帧是时间偏移的，以便不与在第二无线网络上进行的传输相一致。 基于无线收发器被配置为使用协调采样监听来发送分组，用于WSN的唤醒序列传输是时间偏移，以便不与在第二无线网络上进行的传输相一致。