公开(公告)号：US06304618B1

公开(公告)日：2001-10-16

申请号：US09143821

申请日：1998-08-31

申请人： Abdulrauf Hafeez ,  Karl J. Molnar ,  Gregory E. Bottomley

发明人： Abdulrauf Hafeez ,  Karl J. Molnar ,  Gregory E. Bottomley

IPC分类号： H03D100

CPC分类号： H04L25/03337 ,  H04L25/0204

摘要： A plurality of timings are estimated for a received signal wherein the plurality of timings correspond to a plurality of transmitted signals. The received signal is then sampled in accordance with the plurality of timings, to produce a plurality of sample streams from the received signal. Channel estimates are produced for the plurality of transmitted signals and metrics are computed using the sample streams and the channel estimates. Information symbols corresponding to the transmitted signals are detected by using the metrics. Accordingly, by using multiple timings for a received signal, rather than using a common timing, the number of channel taps that are used may be reduced and the accuracy of symbol detection may be increased. The channel estimates may be produced by generating pulse-shape information and producing channel estimates for the multiple transmitted signals using the received signal and the pulse-shape information. Channel estimates may be produced that correspond to a plurality of symbol sequence hypotheses. Channel estimates may be updated using an error signal.

摘要翻译： 针对接收信号估计多个定时，其中多个定时对应于多个发送信号。 然后根据多个定时对接收到的信号进行采样，以从接收信号产生多个采样流。 对于多个发送信号产生信道估计，并且使用采样流和信道估计来计算度量。 通过使用度量来检测对应于所发送的信号的信息符号。 因此，通过对接收到的信号使用多个定时，而不是使用公共定时，可以减少使用的信道抽头的数量，并且可以增加符号检测的精度。 可以通过使用接收信号和脉冲形状信息产生脉冲形状信息并产生多个发送信号的信道估计来产生信道估计。 可以产生对应于多个符号序列假设的信道估计。 可以使用错误信号来更新信道估计。

公开(公告)号：US20080267262A1

公开(公告)日：2008-10-30

申请号：US11850837

申请日：2007-09-06

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

IPC分类号： H04B1/10 ,  H04B7/216

CPC分类号： H04B1/71055 ,  H04B1/7115 ,  H04B2201/709727

摘要： A symbol detector converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.

摘要翻译： 符号检测器将接收符号的初始符号估计转换为用于解码的软估计。 符号检测器计算感兴趣符号的扩展波形和一个或多个干扰符号的扩展波形之间的扩展波形相关性。 通过相应的信号功率缩放扩展波形相关性并补偿噪声来计算干扰抑制项。 根据干扰抑制项计算感兴趣符号的软缩放因子。 然后将软缩放因子应用于初始符号估计以产生软估计。

公开(公告)号：US08295329B2

公开(公告)日：2012-10-23

申请号：US11850837

申请日：2007-09-06

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

IPC分类号： H04B1/00

CPC分类号： H04B1/71055 ,  H04B1/7115 ,  H04B2201/709727

摘要： A symbol detector converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.

摘要翻译： 符号检测器将接收符号的初始符号估计转换为用于解码的软估计。 符号检测器计算感兴趣符号的扩展波形和一个或多个干扰符号的扩展波形之间的扩展波形相关性。 通过相应的信号功率缩放扩展波形相关性并补偿噪声来计算干扰抑制项。 根据干扰抑制项计算感兴趣符号的软缩放因子。 然后将软缩放因子应用于初始符号估计以产生软估计。

公开(公告)号：US6134260A

公开(公告)日：2000-10-17

申请号：US991770

申请日：1997-12-16

申请人： Gregory E. Bottomley ,  Raymond L. Toy ,  Sandeep Chennakeshu ,  Karl J. Molnar

发明人： Gregory E. Bottomley ,  Raymond L. Toy ,  Sandeep Chennakeshu ,  Karl J. Molnar

IPC分类号： H04B1/7075 ,  H04B1/7085 ,  H04R15/00

CPC分类号： H04B1/7075 ,  H04B1/7085

摘要： Systems and methods for frequency acquisition and channel tracking in a direct sequence code division multiple access system are described. Frequency estimates are prepared and refined, which estimates are also used in the channel tracking process.

摘要翻译： 描述了直接序列码分多址系统中频率采集和信道跟踪的系统和方法。 频率估计被准备和改进，这些估计也用于信道跟踪过程。

公开(公告)号：US06768913B1

公开(公告)日：2004-07-27

申请号：US09583535

申请日：2000-06-01

申请人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

发明人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

IPC分类号： H04B138

CPC分类号： H04W16/28 ,  H04B7/18532

摘要： A radio communication system includes a base station having a directional antenna for generating a plurality of beams. A first set of the beams is used to receive signals which are decoded at the base station. A second set of the beams is used for interrogating a cell to identify beams which should be added to the first set of beams (for example, in response to mobile terminals entering the cell). In one embodiment, the second set of beams comprises a plurality of searcher beams produced by a fixed-beam phased array antenna. In a second embodiment, the second set of beams comprises a single searcher beam which is scanned through the cell by an adaptive phased array antenna. The radio communication system can be used to communicate with indoor mobile terminals through a plurality of radio heads, and also can be used to communicate with orbiting satellites.

公开(公告)号：US06694154B1

公开(公告)日：2004-02-17

申请号：US08971341

申请日：1997-11-17

申请人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

发明人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

IPC分类号： H04B138

CPC分类号： H04W16/28 ,  H04B7/18532

摘要： A radio communication system includes a base station having a directional antenna for generating a plurality of beams. A first set of the beams is used to receive signals which are decoded at the base station. A second set of the beams is used for interrogating a cell to identify beams which should be added to the first set of beams (for example, in response to mobile terminals entering the cell). In one embodiment, the second set of beams comprises a plurality of searcher beams produced by a fixed-beam phased array antenna. In a second embodiment, the second set of beams comprises a single searcher beam which is scanned through the cell by an adaptive phased array antenna. The radio communication system can be used to communicate with indoor mobile terminals through a plurality of radio heads, and also can be used to communicate with orbiting satellites.

摘要翻译： 无线电通信系统包括具有用于产生多个波束的定向天线的基站。 第一组光束用于接收在基站处解码的信号。 第二组波束用于询问小区以识别应该被添加到第一组波束（例如，响应于进入小区的移动终端）的波束。 在一个实施例中，第二组波束包括由固定波束相控阵天线产生的多个搜索器波束。 在第二实施例中，第二组波束包括通过自适应相控阵列天线扫描小区的单个搜索器波束。 无线电通信系统可以用于通过多个无线电头与室内移动终端通信，并且还可以用于与轨道卫星通信。

公开(公告)号：US20120069889A1

公开(公告)日：2012-03-22

申请号：US12883698

申请日：2010-09-16

申请人： Karl J. Molnar ,  George Jöngren

发明人： Karl J. Molnar ,  George Jöngren

IPC分类号： H04B17/00

CPC分类号： H04L25/0202 ,  H04J11/0023 ,  H04L1/20 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2647 ,  H04W24/10

摘要： Interference is estimated in an Orthogonal Frequency Division Multiplexing system by receiving at a wireless receiver pilot symbols and data symbols transmitted in time and frequency via resource blocks, detecting a first one of the data symbols transmitted to the wireless receiver via a time-frequency resource element of a first one of the resource blocks and identifying a second one of the resource blocks adjacent the first resource block having related interference parameters. The interference is estimated based on the pilot symbols transmitted via the first resource block and the pilot symbols transmitted via the second resource block.

摘要翻译： 在正交频分复用系统中通过在无线接收机上接收经由资源块在时间和频率上发送的导频符号和数据符号来估计干扰，检测经由时间 - 频率资源元素发送到无线接收机的第一个数据符号 并且识别与具有相关干扰参数的第一资源块相邻的资源块中的第二个资源块。 基于经由第一资源块发送的导频符号和经由第二资源块发送的导频符号来估计干扰。

公开(公告)号：US20120069833A1

公开(公告)日：2012-03-22

申请号：US12883482

申请日：2010-09-16

申请人： Karl J. Molnar

发明人： Karl J. Molnar

IPC分类号： H04B7/216

CPC分类号： H04L1/0023 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0639 ,  H04B7/0658 ,  H04L1/0045 ,  H04L25/03

摘要： Teachings herein provide reduced complexity channel state information (CSI) reporting for a successively decoded, precoded multi-antenna transmission. A wireless communication device reports CSI by forming, for each candidate transmission rank of the transmission, a sequence of codewords by iteratively adding codewords allowed for that rank to the sequence. At any given point in the sequence, the device adds the codeword expected to yield the highest individual information rate if decoded at that point in the sequence, considering the different rates possible under different precodings of the transmission. The device then computes, for each rank, a sum information rate across the codewords in the sequence formed for that rank, selects the rank having the highest sum information rate, and reports the selected rank along with the sequence formed for that rank. CSI reporting complexity is reduced because the device constrains its evaluation to only some of the possible decoding sequences.

摘要翻译： 这里的教导为连续解码的预编码的多天线传输提供了降低复杂度的信道状态信息（CSI）报告。 无线通信设备通过向该序列迭代地添加允许该等级的码字，为传输的每个候选传输等级形成码字序列来报告CSI。 在序列中的任何给定点处，考虑到在传输的不同预编码下可能的不同速率，设备将预期的码字添加以产生最高个体信息速率，如果在序列中的那一点被解码。 然后，该装置针对每个等级计算在为该等级形成的序列中的码字之间的和信息速率，选择具有最高和信息速率的秩，并且将所选择的等级与为该等级形成的序列一起报告。 由于设备将其评估限制为只有一些可能的解码序列，因此CSI报告复杂度降低。

公开(公告)号：US06684071B1

公开(公告)日：2004-01-27

申请号：US08597073

申请日：1996-02-05

申请人： Karl J. Molnar ,  Paul W. Dent

发明人： Karl J. Molnar ,  Paul W. Dent

IPC分类号： H04Q720

CPC分类号： H04L25/03331 ,  H01Q1/246 ,  H01Q21/08 ,  H01Q21/28 ,  H04B7/0837 ,  H04B7/0851 ,  H04B7/10 ,  H04B7/18515 ,  H04B7/18532 ,  H04B7/18545 ,  H04B7/1855 ,  H04B7/18567 ,  H04W64/00 ,  H04W84/06 ,  H04W88/02

摘要： Exemplary embodiments of the present invention describe terminal position location methods and systems. Relative powers of nearby spot beams which are generated by array antennas are determined. For example, powers from six neighboring spot beams relative to a center spot beam within which a mobile station is currently operating, can be measured relative to the power of the center spot beam. Using information from these measurements, the mobile stations position can be determined using, for example, an exponential model of the spot beam pattern.

摘要翻译： 本发明的示例性实施例描述了终端位置定位方法和系统。 确定由阵列天线产生的附近点波束的相对功率。 例如，可以相对于中心点光束的功率测量相对于移动台当前正在其中操作的中心点波束的六个相邻点波束的功率。 使用来自这些测量的信息，可以使用例如点波束图案的指数模型来确定移动台位置。

公开(公告)号：US06490261B1

公开(公告)日：2002-12-03

申请号：US09429463

申请日：1999-10-28

申请人： Paul W. Dent ,  Karl J. Molnar

发明人： Paul W. Dent ,  Karl J. Molnar

IPC分类号： H04J300

CPC分类号： H04W52/42 ,  H04B7/0408 ,  H04B7/06

摘要： A time-division multiple access (TDMA) base station is disclosed for preserving across-slot signal continuity of signals transmitted in different directions on a given frequency. The base station includes a multi-directional antenna for radiating signals. A processor is operatively coupled to the antenna for generating a first data signal for a first time slot of a TDMA frame including a first pre-determined symbol pattern and a second pre-determined symbol pattern, for generating a second data signal for a second time slot of the TDMA frame including the second predetermined symbol pattern, and for communicating the first data signal and the second data signal to the antenna such that the first data signal is radiated in a first direction and the second data signal is radiated in a second direction. The first data signal is modulated at a first phase for transmission in the first time slot at a first power level in the first direction on the given frequency. The second data signal is modulated at a second phase for transmission in the second time slot at a second power level in the second direction on the given frequency.

摘要翻译： 公开了一种用于在给定频率上保持在不同方向上发射的信号的跨时隙信号连续性的时分多址（TDMA）基站。 基站包括用于辐射信号的多向天线。 处理器可操作地耦合到天线，用于产生包括第一预定符号模式和第二预定符号模式的TDMA帧的第一时隙的第一数据信号，用于第二次产生第二数据信号 包括第二预定符号模式的TDMA帧的时隙，并且用于将第一数据信号和第二数据信号传送到天线，使得第一数据信号沿第一方向辐射，并且第二数据信号沿第二方向辐射 。 第一数据信号在第一阶段被调制，以在给定频率上的第一方向上的第一功率电平在第一时隙中传输。 第二数据信号在第二阶段被调制，以在给定频率上的第二方向上以第二功率电平在第二时隙中传输。