公开(公告)号：US09246510B2

公开(公告)日：2016-01-26

申请号：US14502011

申请日：2014-09-30

Applicant: Texas Instruments Incorporated

Inventor： Mohamed F. Mansour ,  Lars Jorgensen

IPC: H04L25/49 ,  H03M5/18 ,  H03M13/15 ,  H03M13/25 ,  H04L27/36 ,  H03M13/13

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 input blocks each having multiple bits to be transmitted. The method also includes applying a first encoding scheme to a first subset of the bits in the input blocks to generate first encoded bits and applying a second encoding scheme to a second subset of the bits in the input blocks to generate second encoded bits. The second encoding scheme has lower overhead than the first encoding scheme. The method further includes generating symbols using the first and second encoded bits. The first encoded bits include two or more first bits per symbol of each output block, and the second encoded bits include one or more second bits per symbol of each output block.

Abstract translation: 一种方法包括接收每个具有要发送的多个比特的输入块。 该方法还包括将第一编码方案应用于输入块中的比特的第一子集以产生第一编码比特并将第二编码方案应用于输入块中的比特的第二子集以产生第二编码比特。 第二编码方案具有比第一编码方案更低的开销。 该方法还包括使用第一和第二编码比特生成符号。 第一编码比特包括每个输出块的每个符号的两个或更多个第一比特，并且第二编码比特包括每个输出块的每个符号的一个或多个第二比特。

公开(公告)号：US20150214988A1

公开(公告)日：2015-07-30

申请号：US14679603

申请日：2015-04-06

Applicant: Texas Instruments Incorporated

Inventor： Hardik Prakash Gandhi ,  Zigang Yang ,  Xiaohan Chen ,  Raul Blazquez ,  Lars Jorgensen ,  Hongzhi Zhao ,  Jie Yang

IPC: H04B1/04 ,  H04L27/26

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/0288 ,  H03F1/3241 ,  H03F3/24 ,  H04B2001/0416 ,  H04B2001/045 ,  H04L27/2614

Abstract: A method of predistorting an input signal (902) for an amplifier is disclosed (FIG. 9). The method includes predistorting the input signal with a first set of parameters (FDPD) and a second set of parameters (CDPD) at a first time (904). The first set of parameters is updated at a second time (914). The second set of parameters is updated separately from the first set of parameters at a third time (920).

Abstract translation: 公开了一种用于放大器的输入信号（902）的预失真的方法（图9）。 该方法包括在第一时间（904）用第一组参数（FDPD）和第二组参数（CDPD）预失真输入信号。 第一组参数第二次更新（914）。 第二组参数在第三时间与第一组参数分开更新（920）。

公开(公告)号：US20150092879A1

公开(公告)日：2015-04-02

申请号：US14502011

申请日：2014-09-30

Applicant: Texas Instruments Incorporated

Inventor： Mohamed F. Mansour ,  Lars Jorgensen

IPC: H04L25/49

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 input blocks each having multiple bits to be transmitted. The method also includes applying a first encoding scheme to a first subset of the bits in the input blocks to generate first encoded bits and applying a second encoding scheme to a second subset of the bits in the input blocks to generate second encoded bits. The second encoding scheme has lower overhead than the first encoding scheme. The method further includes generating symbols using the first and second encoded bits. The first encoded bits include two or more first bits per symbol of each output block, and the second encoded bits include one or more second bits per symbol of each output block.

Abstract translation: 一种方法包括接收每个具有要发送的多个比特的输入块。 该方法还包括将第一编码方案应用于输入块中的比特的第一子集以产生第一编码比特并将第二编码方案应用于输入块中的比特的第二子集以产生第二编码比特。 第二编码方案具有比第一编码方案更低的开销。 该方法还包括使用第一和第二编码比特生成符号。 第一编码比特包括每个输出块的每个符号的两个或更多个第一比特，并且第二编码比特包括每个输出块的每个符号的一个或多个第二比特。

公开(公告)号：US20140177740A1

公开(公告)日：2014-06-26

申请号：US14051194

申请日：2013-10-10

Applicant: Texas Instruments Incorporated

Inventor： Mohamed Farouk Mansour ,  Lars Jorgensen

IPC: H04L27/30

CPC classification number: H04L25/067 ,  H04L27/3411 ,  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 ū and v is found. The euclidean distance to the immediate neighbors resulting in the immediate upper and lower integers for ū and v is computed. From the distance to the nearest neighbor, the log-likelihood ratio value is computed.

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，找到初始估计ū和v。 计算与直接相邻的欧几里德距离，导致ū和v的立即上下整数。 从距离到最近的邻居，计算对数似然比值。

公开(公告)号：US20140169496A1

公开(公告)日：2014-06-19

申请号：US14108343

申请日：2013-12-17

Applicant: Texas Instruments Incorporated

Inventor： Zigang Yang ,  Lars Jorgensen ,  Hardik Gandhi ,  Lei Ding

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F3/24 ,  H03F2200/435 ,  H04L27/368

Abstract: Systems and methods for crest factor reduction (CFR) are described. A multi-band CFR architecture achieves significant hardware savings without sacrificing CFR performance by applying peak cancellation to each band individually. However, peak detection is calculated based on a combined input signal.

Abstract translation: 描述了波峰因数降低的系统和方法（CFR）。 多频段CFR架构通过对每个频带单独应用峰值消除，可以显着节省硬件成本，而不会牺牲CFR性能。 然而，基于组合的输入信号计算峰值检测。

公开(公告)号：US20140140452A1

公开(公告)日：2014-05-22

申请号：US13683019

申请日：2012-11-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Hardik Prakash Gandhi ,  Zigang Yang ,  Lars Jorgensen ,  Prasad Chivakula

IPC: H04B1/10

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425 ,  H04L27/26 ,  H04L27/2624

Abstract: A method to form a CFR cancellation filter for signals with dynamic power and frequency distribution by estimating the filter at the rate required by the input signal's dynamics. For mixed mode systems (for example CDMA and LTE) the CFR is computed for each stream, and combined to form the final filter.

Abstract translation: 通过以输入信号动态所需的速率估计滤波器，形成具有动态功率和频率分布的信号的CFR消除滤波器的方法。 对于混合模式系统（例如CDMA和LTE），为每个流计算CFR，并组合以形成最终滤波器。