公开(公告)号：US08064531B2

公开(公告)日：2011-11-22

申请号：US12612208

申请日：2009-11-04

申请人： Karl Molnar

发明人： Karl Molnar

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/0008 ,  H04L27/2649

摘要： In one embodiment, a receiver implements a method of demodulating a set of symbols dispersed within a time-frequency grid of a received OFDM signal. The method includes determining which one of two or more demodulators is preferred for use in a given region of the time-frequency grid by evaluating detection statistics generated by the demodulators for the set of symbols. Each demodulator operates according to different demodulation parameters that correspond to different interference assumptions. The method further includes recovering the set of symbols for decoding using whichever demodulator is preferred for each symbol according to the region from which the symbol is recovered. The method may be further extended by updating each demodulator's demodulation parameters using reference and/or data symbols from the region(s) where that demodulator is preferred, and recovering the desired symbols using the updated demodulation parameters. Such updating can be further iterated, for additional demodulation parameter refinement.

摘要翻译： 在一个实施例中，接收机实现解调分散在接收的OFDM信号的时间 - 频率网格内的一组符号的方法。 该方法包括通过评估用于该组符号的解调器生成的检测统计来确定两个或更多个解调器中哪一个优选用于时间频率网格的给定区域。 每个解调器根据对应于不同干扰假设的不同解调参数进行操作。 该方法还包括根据从其恢复符号的区域，使用优选用于每个符号的哪个解调器来恢复用于解码的符号集合。 可以通过使用来自优选解调器的区域的参考和/或数据符号来更新每个解调器的解调参数，以及使用更新的解调参数来恢复所需符号来进一步扩展该方法。 对于额外的解调参数细化，可以进一步重复这种更新。

公开(公告)号：US20110013556A1

公开(公告)日：2011-01-20

申请号：US12504233

申请日：2009-07-16

申请人： Karl Molnar ,  Gregory E. Bottomley

发明人： Karl Molnar ,  Gregory E. Bottomley

IPC分类号： H04W88/00 ,  H04B1/10

CPC分类号： H04J11/0023 ,  G06T1/00 ,  H04L27/2647

摘要： Demodulation and interference parameter estimation in an OFDM receiver is improved by identifying regions, in a two-dimensional array of time-frequency transmission positions, having related interference parameters, such as resulting from the same pre-coding scheme, transmission rank, transmitting antennas, and the like. An interference measure is estimated for each of a plurality of time-frequency positions. The interference measures are analyzed by considering them as pixels, or picture elements, in a two-dimensional image, and applying image processing algorithms to identify the regions having related interference parameters. The image processing algorithms may include operations such as edge detection, segmentation, and/or clustering. The receiver may perform interference suppression or cancellation such as interference rejection combining of data extracted from signals received within an identified time-frequency region having related interference parameters.

摘要翻译： 通过在具有相关干扰参数的时间 - 频率传输位置的二维阵列中识别区域来提高OFDM接收机中的解调和干扰参数估计，例如由相同的预编码方案，传输等级，发射天线， 等等。 针对多个时频位置中的每一个估计干扰测量。 通过将它们视为二维图像中的像素或图像元素，并应用图像处理算法来识别具有相关干扰参数的区域来分析干扰测量。 图像处理算法可以包括诸如边缘检测，分割和/或聚类的操作。 接收机可以执行干扰抑制或消除，例如从具有相关干扰参数的识别的时间 - 频率区域内接收的信号中提取的数据的干扰抑制组合。

公开(公告)号：US06266534B1

公开(公告)日：2001-07-24

申请号：US09488460

申请日：2000-01-20

申请人： Alex K. Raith ,  Rajaram Ramesh ,  Karl Molnar ,  R. David Koilpillai ,  Havish Koorapaty

发明人： Alex K. Raith ,  Rajaram Ramesh ,  Karl Molnar ,  R. David Koilpillai ,  Havish Koorapaty

IPC分类号： H04Q720

CPC分类号： G01S5/14 ,  G01S5/06 ,  H04W4/90 ,  H04W76/50

摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide improved techniques for using a system of monitoring or adjunct stations to provide this location information to the emergency service centers. For example, received signal strength measurements in conjunction with path loss models, alone or in conjunction with either time of arrival (TOA) or time difference of arrival (TDOA) techniques can be selectively used to process received signals and provide location information. Techniques for improving timing estimates are also disclosed.

摘要翻译： 在不久的将来，紧急呼叫处理可能需要向紧急服务中心提供终端单元位置信息。 本发明的示例性实施例提供了使用监控系统或附加站的改进技术来向紧急服务中心提供该位置信息。 例如，可以选择性地使用接收的信号强度测量结合路径损耗模型，单独地或与到达时间（TOA）或到达时差（TDOA）技术相结合来处理接收到的信号并提供位置信息。 还公开了用于改善时序估计的技术。

公开(公告)号：US6084929A

公开(公告)日：2000-07-04

申请号：US7936

申请日：1998-01-16

申请人： Karl Molnar ,  Greg Bottomley ,  Rajaram Ramesh

发明人： Karl Molnar ,  Greg Bottomley ,  Rajaram Ramesh

IPC分类号： H04L27/01 ,  H04B1/707 ,  H04B3/04 ,  H04B3/06 ,  H04B7/005 ,  H04L25/02 ,  H04L25/03 ,  H04Q7/38 ,  H04B1/10

CPC分类号： H04B1/707 ,  H04B7/005 ,  H04L25/0202 ,  H04L25/03178 ,  H04L25/03299

摘要： A method and apparatus for channel tracking is disclosed wherein pulse-shaping information is used to improve channel tracking performance. Information symbol values are prefiltered using the pulse shape information for a received baseband signal to generate a filtered waveform. The filtered waveform provides a reference signal for a medium response estimation. The estimated medium response is used with a coherent detector to detect unknown information symbols within the baseband signal. Medium response estimates can be determined for a single detected symbol sequence or for each hypothesized symbol sequence.

摘要翻译： 公开了一种用于信道跟踪的方法和装置，其中使用脉冲整形信息来改善信道跟踪性能。 信息符号值使用接收到的基带信号的脉冲形状信息进行过滤，以生成滤波波形。 经滤波的波形提供用于介质响应估计的参考信号。 估计的介质响应与相干检测器一起使用以检测基带信号内的未知信息符号。 可以为单个检测到的符号序列或每个假设的符号序列确定中等响应估计。

公开(公告)号：US4599869A

公开(公告)日：1986-07-15

申请号：US588616

申请日：1984-03-12

申请人： Geoffrey A. Ozin ,  Karl Molnar

发明人： Geoffrey A. Ozin ,  Karl Molnar

IPC分类号： B01D8/00 ,  B01J12/00

CPC分类号： B01J12/00 ,  B01D8/00 ,  Y10S417/901

摘要： A reactor for performing reactions at very low, i.e. cryogenic temperatures has a collection vessel mounted above an electron gun to collect vaporized material such as metals, metal oxides, metal salts and metal halides. The collection vessel is maintained at a very low temperature, typically between 14.degree. and 77.degree. K., by a heat pump that also serves as a support for the collection vessel. A manifold introduces a reagent into the reactor between the electron gun and the vessel to react with the vaporized material and form a product. The product is condensed on the collection vessel which may then be inverted to provide a stable support for the collected product during further experimentation.

摘要翻译： 用于在非常低（即低温）下进行反应的反应器具有安装在电子枪上方的收集容器以收集蒸发的材料，例如金属，金属氧化物，金属盐和金属卤化物。 收集容器通过也用作收集容器的支撑物的热泵，保持在非常低的温度，通常在14℃和77℃之间。 歧管将试剂引入电子枪和容器之间的反应器中以与蒸发的材料反应并形成产物。 产物在收集容器上冷凝，然后可以将其反转，以在进一步实验期间为收集的产物提供稳定的支持。