公开(公告)号：US20030016640A1

公开(公告)日：2003-01-23

申请号：US10107275

申请日：2002-03-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko N. Onggosanusi ,  Anand G. Dabak

IPC: H04B007/216

CPC classification number: H04L25/03114 ,  H04L1/0618 ,  H04L2025/03605

Abstract: A wireless receiver (301) for receiving multiple space time encoded signals from a plurality of transmit antenna sets (TAT1 through TAT2, and TAT3 through TAT4), wherein the multiple space time encoded signals comprise a set of symbols and wherein each transmit antenna set is coupled to a corresponding encoder (221, 222) at a single transmitter (121). The receiver comprises a plurality of receive antennas (RAT1 through RATQ) and collection circuitry (32), coupled to the plurality of receive antennas, for collecting a plurality of signal samples for a plurality of successive time instances and from each of the plurality of receive antennas. The collected samples comprise samples of multipaths of the space time encoded signals. The receiver also comprises circuitry (34, 36), coupled to the plurality of receive antennas, for determining a linear time invariant multiple-input multiple-output matrix in response to pilot values in the received multiple space time encoded signals. Finally, the receiver comprise circuitry (40, 421, 441) for estimating at least selected ones of the symbols in response to the signal samples and the linear time invariant multiple-input multiple-output matrix.

Abstract translation: 一种用于从多个发射天线组（TAT1至TAT2和TAT3至TAT4）接收多个时空编码信号的无线接收机（301），其中多个时空编码信号包括一组符号，并且其中每个发射天线组是 在单个发射机（121）处耦合到对应的编码器（221,222）。 接收机包括耦合到多个接收天线的多个接收天线（RAT1至RATQ）和收集电路（32），用于收集多个连续时间实例的多个信号样本，并且从多个接收中的每一个接收 天线。 收集的样本包括空时编码信号的多路径样本。 接收机还包括耦合到多个接收天线的电路（34,36），用于响应于所接收的多个时空编码信号中的导频值来确定线性时间不变的多输入多输出矩阵。 最后，接收机包括用于响应于信号样本和线性时变不变多输入多输出矩阵来估计符号中的至少一个选择符号的电路（40,42,444a）。

公开(公告)号：US20040218683A1

公开(公告)日：2004-11-04

申请号：US10818628

申请日：2004-04-06

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand G. Dabak ,  Srinath Hosur

IPC: H04Q007/24

CPC classification number: H04L27/0008 ,  H04L1/0003 ,  H04W48/18 ,  H04W84/18 ,  H04W88/02 ,  H04W88/06

Abstract: Multi-mode wireless devices having single-mode or reduced-mode receivers. In one embodiment, a wireless device is provided with a transmitter and a receiver. The transmitter transmits with any one of multiple selectable modulation techniques, the selected modulation technique being selected to correspond to a modulation technique supported by a target wireless device. The receiver receives signals modulated in accordance any one of a subset of the selectable modulation techniques. The subset might include only one modulation technique. Also disclosed is a wireless communications method in a wireless device having a transmitter configurable to transmit in at least one modulation mode other than that receivable by the wireless device.

Abstract translation: 具有单模或缩减模式接收机的多模无线设备。 在一个实施例中，无线设备设置有发射机和接收机。 发射机利用多种可选调制技术中的任何一种进行发送，所选择的调制技术被选择为对应于由目标无线设备支持的调制技术。 接收机接收根据可选调制技术的子集中任一个调制的信号。 该子集可以仅包括一种调制技术。 还公开了一种无线设备中的无线通信方法，其具有可配置为以除由无线设备可接收的以外的至少一个调制模式发送的发射机。

公开(公告)号：US20030026349A1

公开(公告)日：2003-02-06

申请号：US10131742

申请日：2002-04-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko N. Onggosanusi ,  Anand G. Dabak

IPC: H04B007/02

CPC classification number: H04B7/0634 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0678 ,  H04B7/0697 ,  H04L1/0068 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0668

Abstract: A transmitter comprising circuitry (14) for converting input bits to a plurality of symbols; and circuitry (24x) for forming a complex conjugate of signals corresponding to selected ones of the plurality of symbols. The selected ones of the plurality of symbols consist of signals corresponding to some and less than all the plurality of symbols. The transmitter also comprises circuitry (28x) for space time encoding both the signals corresponding to the selected ones of the plurality of symbols and signals corresponding to non-selected ones of the plurality of symbols. Lastly, the transmitter comprises a plurality of transmit antennas (TATx) coupled to transmit signals in response to the circuitry for space time encoding.

Abstract translation: 一种发射机，包括用于将输入比特转换成多个符号的电路（14） 以及用于形成与多个符号中的选定符号对应的信号的复共轭的电路（24x）。 所述多个符号中的所选择的符号由对应于一些且小于所有多个符号的信号组成。 发射机还包括电路（28x），用于空间时间编码对应于多个符号中的选定符号的信号和对应于多个符号中的未被选择符号的信号。 最后，发射机包括响应于用于时空编码的电路而耦合到发射信号的多个发射天线（TATx）。

公开(公告)号：US20020196842A1

公开(公告)日：2002-12-26

申请号：US10026278

申请日：2001-12-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko N. Onggosanusi ,  Anand G. Dabak

IPC: H04K001/00

CPC classification number: H04B7/0417 ,  H04B1/7115 ,  H04B7/0634 ,  H04B7/082 ,  H04B7/0854 ,  H04B2201/70702 ,  H04L1/0001 ,  H04L1/0025 ,  H04L1/0029 ,  H04L1/0675 ,  H04L25/03343 ,  H04L2025/03375

Abstract: A wireless receiver (74) for receiving signals from a transmitter (72). The transmitter comprises a plurality of transmit antennas (TAT1null, TAT2null) for transmitting the signals, which comprise respective independent streams of symbols. Additionally, interference occurs between the respective streams. The receiver comprises a plurality of receive antennas (RAT1null, RAT2null) for receiving the signals as influenced by a channel effect between the receiver and the transmitter. The receiver also comprises circuitry (80) for multiplying the signals times a conjugate transpose of an estimate of the channel effect and times a conjugate transpose of a linear basis transformation matrix. The receiver also comprises circuitry (84) for selecting the linear basis transformation matrix from a finite set of linear basis transformation matrices. Lastly, the receiver comprises circuitry (88) for removing the interference between the respective streams.

Abstract translation: 一种用于从发射机（72）接收信号的无线接收机（74）。 发射机包括用于发送信号的多个发射天线（TAT1'，TAT2'），其包括相应的独立的符号流。 另外，在各个流之间发生干扰。 接收机包括多个接收天线（RAT1'，RAT2'），用于接收由接收机和发射机之间的信道效应影响的信号。 接收机还包括用于将信号乘以信道效应的估计的共轭转置乘以线性基变换矩阵的共轭转置次数的电路（80）。 接收机还包括用于从有限线性基变换矩阵组中选择线性基变换矩阵的电路（84）。 最后，接收机包括用于消除各个流之间的干扰的电路（88）。

公开(公告)号：US20020018529A1

公开(公告)日：2002-02-14

申请号：US09885878

申请日：2001-06-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anand G. Dabak ,  Eko N. Onggosanusi ,  Timothy M. Schmidl ,  Alan Gatherer

IPC: H04B007/06

CPC classification number: H04L1/0631 ,  H04B1/7115 ,  H04B7/0613 ,  H04J13/00 ,  H04J13/0048 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0618

Abstract: A wireless communication network (10) comprising a wireless transmitter (12). The transmitter comprises a plurality of antennas (AT11, AT12), wherein each of the plurality of antennas is operable for transmitting signals. The transmitter also comprises, for each of a plurality of different user channels (Dn), circuitry (22n) for providing a plurality of groups of symbols in a first symbol group sequence (D1n). The transmitter also comprises, for each of the plurality of different user channels, circuitry (241n) for forming a first modulated symbol group sequence for the user channel by modulating the symbols in the first symbol group sequence for the user channel with a unique code that corresponds to the user channel and distinguishes the user channel from each other of the plurality of different user channels and circuitry (261) for combining the first modulated symbol group sequences and providing them for transmission by a first antenna (AT11). The transmitter also comprises, for each of the plurality of different user channels, circuitry (22n) for forming a second symbol group sequence (D2n) by re-ordering the groups of symbols in the first symbol group sequence and further by time reversing symbols in at least some of the groups of symbols. Also for each of the plurality of different user channels, the transmitter comprises circuitry (242n) for forming a second modulated symbol group sequence for the user channel by modulating the symbols in the second symbol group sequence for the user channel with a unique code that corresponds to the user and distinguishes the user from each other of the plurality of different user channels. Finally, the transmitter comprises circuitry (262) for combining the second modulated symbol group sequences and providing them for transmission by the second antenna (AT12).

Abstract translation: 一种包括无线发射机（12）的无线通信网络（10）。 发射机包括多个天线（AT11，AT12），其中多个天线中的每一个可操作用于发射信号。 对于多个不同用户信道（Dn）中的每一个，发射机还包括用于在第一符号组序列（D1n）中提供多个符号组的电路（22n）。 发射机还包括用于多个不同用户信道中的每一个的电路（241n），用于通过用唯一码调制用户信道的第一符号组序列中的符号来形成用于用户信道的第一调制符号组序列， 对应于用户信道并且区分多个不同用户信道中的用户信道和用于组合第一调制符号组序列并将其提供给第一天线（AT11）的传输的电路（261）。 发射机还包括用于多个不同用户信道中的每一个的电路（22n），用于通过重新排序第一符号组序列中的符号组，并进一步通过时间反转符号来形成第二符号组序列（D2n） 至少一些符号组。 对于多个不同的用户信道中的每一个，发射机包括电路（242n），用于通过用相应的唯一码调制用户信道的第二符号组序列中的符号来形成用于用户信道的第二调制符号组序列 并且将用户与多个不同用户信道中的用户区分开。 最后，发射机包括用于组合第二调制符号组序列并将其提供给第二天线（AT12）的传输的电路（262）。

公开(公告)号：US20040203456A1

公开(公告)日：2004-10-14

申请号：US10260761

申请日：2002-09-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko N. Onggosanusi ,  Anand G. Dabak ,  Timothy M. Schmidl

IPC: H04B017/00 ,  H04Q007/20 ,  H04B007/005 ,  H04B007/01 ,  H04B007/015 ,  H04B015/00

CPC classification number: H04L25/03038 ,  H04L1/06 ,  H04L1/16 ,  H04L1/1812 ,  H04L25/0228 ,  H04L25/067 ,  H04L2025/0342 ,  H04L2025/03624 ,  Y10S370/913

Abstract: A wireless receiver (30x) for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a plurality of symbols. The receiver comprises at least one receive antenna (RATx) and collection circuitry (38). The collection circuitry is coupled to the at least one receive antenna and is for collecting a plurality of signal samples from the at least one receive antenna. The plurality of signal samples comprise at least one symbol and interference effects between different symbols communicated from the transmitter to the receiver. The receiver also comprises suppression circuitry (44 or 60), coupled to the collection circuitry, for suppressing the interference effects. The receiver also comprises circuitry (46, 48, 50) for receiving signals from the suppression circuitry and for providing estimates of a group of bits and detection circuitry (52) for detecting an error in a packet that comprises the group of bits. Lastly, the receiver also comprises circuitry (52) for requesting the transmitter to transmit a retransmission of a packet in response to the detection circuitry detecting the error.

Abstract translation: 一种无线接收器（30x），用于在受干扰限制的系统中接收来自干扰限制发射机的信号，所述干扰受限系统包括至少一个发射天线，其中所述信号包括多个符号。 接收机包括至少一个接收天线（RATx）和收集电路（38）。 收集电路耦合到所述至少一个接收天线，并用于从所述至少一个接收天线收集多个信号样本。 多个信号样本包括从发射机到接收机之间传送的不同符号之间的至少一个符号和干扰效应。 接收机还包括耦合到收集电路的用于抑制干扰效应的抑制电路（44或60）。 接收机还包括用于从抑制电路接收信号并用于提供一组比特的估计和用于检测包含该比特组的分组中的错误的检测电路（52）的电路（46,48,50）。 最后，接收机还包括电路（52），用于响应于检测电路检测错误，请求发送器发送分组的重传。

公开(公告)号：US20040127164A1

公开(公告)日：2004-07-01

申请号：US10699707

申请日：2003-11-03

Applicant: Texas Instruments Incorporated

Inventor： Antonio F. Mondragon-Torres ,  Steven P. Pekarich ,  Timothy M. Schmidl ,  Gibong Jeong ,  Aris Papasakellariou ,  Anand G. Dabak ,  Eko N. Onggosanusi

IPC: H04B017/00

CPC classification number: H04L25/03006 ,  H04B1/7103 ,  H04B1/7117 ,  H04B2201/7071 ,  H04L25/03987 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03509 ,  H04L2025/03535

Abstract: A reconfigurable chip level equalizer having circuitry that restores signal orthogonality and eliminates channel interference for a wireless transmitted signal. In at least some embodiments, the reconfigurable chip level equalizer comprises two or more adaptive equalizers, a plurality of operational blocks that interconnect the two or more adaptive equalizers, and a control mechanism that configures the two or more adaptive equalizers and operational blocks according to different signal delay profiles.

Abstract translation: 具有恢复信号正交性并消除无线发射信号的信道干扰的电路的可重构芯片级均衡器。 在至少一些实施例中，可重新配置的芯片级均衡器包括两个或多个自适应均衡器，互连两个或多个自适应均衡器的多个操作块，以及根据不同的配置两个或多个自适应均衡器和操作块的控制机制 信号延迟分布。

公开(公告)号：US20010033601A1

公开(公告)日：2001-10-25

申请号：US09795634

申请日：2001-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mohammed H. Nafie ,  Anand G. Dabak

IPC: H04K001/00

CPC classification number: H04B1/7156 ,  H04B2001/71566

Abstract: A wireless communication network comprising a wireless receiver. The wireless receiver comprises at least a first antenna for receiving packets, wherein each of the received packets comprises a plurality of bits and each of the plurality of bits is modulated by a frequency offset. The wireless receiver also comprises circuitry for cycling through a hopping sequence, wherein the hopping sequence comprises a sequence of frequency bands and circuitry for demodulating each received packet in response to a frequency band in the hopping sequence. The wireless receiver also comprises circuitry for detecting the frequency offset of each of the plurality of bits and converting the frequency offset of each of the plurality of bits into a corresponding DC voltage for each of the plurality of bits. Still further, the wireless receiver comprises circuitry for sampling the DC voltage for each of the plurality of bits and providing a DC offset voltage for each of the plurality of bits, and it also comprises circuitry for providing a filtered DC offset voltage by filtering the DC offset voltage. Lastly, the wireless receiver also comprises circuitry for providing a digital value corresponding to each of the plurality of bits in response to the corresponding DC voltage for each of the plurality of bits as adjusted in response to the filtered DC offset voltage.

Abstract translation: 一种包括无线接收机的无线通信网络。 无线接收器至少包括用于接收分组的第一天线，其中每个接收的分组包括多个比特，并且多个比特中的每一个被频率偏移调制。 无线接收机还包括用于循环穿过跳频序列的电路，其中跳频序列包括频带序列和用于响应于跳频序列中的频带来解调每个接收到的分组的电路。 无线接收机还包括用于检测多个比特中的每一个的频率偏移的电路，并将多个比特中的每一个的频率偏移转换成多个比特中的每一个的对应的DC电压。 另外，无线接收机包括用于对多个比特中的每一个比特的DC电压进行采样并为多个比特中的每一个提供DC偏移电压的电路，并且还包括用于通过对DC 失调电压。 最后，无线接收机还包括电路，用于响应于根据经滤波的DC偏移电压进行调整的响应于多个比特中的每一个的相应DC电压，提供对应于多个比特中的每一个的数字值。