公开(公告)号：US07298777B2

公开(公告)日：2007-11-20

申请号：US10455020

申请日：2003-06-06

申请人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar ,  William S. Clark, Jr.

发明人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar ,  William S. Clark, Jr.

IPC分类号： H04B1/00

CPC分类号： H04B1/708

摘要： This disclosure is generally directed to communication systems, devices used in communication systems and associated methods which may implement parallel hypothesis search techniques. The disclosed parallel hypothesis search techniques may permit a hypothesis to be dismissed early (i.e., before hypotheses in other searchers have completed their evaluation). Early hypothesis dismissal permits a new hypothesis to be loaded into the searcher while other searchers advantageously continue to evaluate their hypotheses.

摘要翻译： 本公开通常涉及通信系统，在通信系统中使用的设备和可以实现并行假设搜索技术的相关方法。 公开的平行假设检索技术可以允许早期解除假设（即，在其他搜索者的假设已经完成其评估之前）。 早期假设解雇允许将新假设加载到搜索者中，而其他搜索者有利地继续评估其假设。

公开(公告)号：US07295598B2

公开(公告)日：2007-11-13

申请号：US10439400

申请日：2003-05-16

申请人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar ,  William S. Clark, Jr.

发明人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar ,  William S. Clark, Jr.

IPC分类号： H04B1/00

CPC分类号： H04B1/70755

摘要： A method and system for processing the results of searches for signals in a direct sequence spread spectrum communications system in an intelligent and efficient manner. A preferred embodiment comprises a search engine (for example, search engine 405) and a hardware result processor (for example, result processor 410) with a memory (for example, memory 415) as an interface. The search engine may perform multiple correlations of a pilot channel and then writes the correlation results exceeding a specified threshold to the memory. The result processor reads the correlation results from the memory and performs result filtering and builds a list of maximum value correlation results. The result processor and the search engine functions with independence from one another therefore, there is therefore, little wasted overhead where one has to wait for the other. The result filtering also makes it simpler to combine signal multipaths and simplifies pilot channel strength comparisons.

摘要翻译： 一种用于以智能且有效的方式处理在直接序列扩频通信系统中搜索信号的结果的方法和系统。 优选实施例包括具有作为接口的存储器（例如，存储器415）的搜索引擎（例如，搜索引擎405）和硬件结果处理器（例如，结果处理器410）。 搜索引擎可以执行导频信道的多个相关性，然后将超过规定阈值的相关结果写入存储器。 结果处理器从存储器读取相关结果，并执行结果过滤，并建立最大值相关结果列表。 结果处理器和搜索引擎的功能彼此独立，因此，因此，必须等待另一个的开销很少。 结果滤波也使得组合信号多路径更简单，并简化了导频信道强度比较。

公开(公告)号：US07324585B2

公开(公告)日：2008-01-29

申请号：US10650427

申请日：2003-08-28

申请人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar

发明人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar

IPC分类号： H04B1/00

CPC分类号： H04B1/70752 ,  H04B1/709

摘要： System and method for performing symbol boundary aligned searches of signals. A preferred embodiment comprises a search control unit (such as search control unit 725) that can determine a start and stop condition for a correlation based on a hypothesis, a searcher (such as searcher 705) which includes a multiplexer that can select a subset of samples of a received sequence based on the hypothesis and start and stop conditions. The search control unit can then wait for the occurrence of the start condition and assign the hypothesis to a correlator, which will correlate the subset of samples with a locally generated pseudo-random number sequence based upon the hypothesis.

摘要翻译： 用于执行信号的符号边界对齐搜索的系统和方法。 优选实施例包括可以基于假设确定用于相关的开始和停止条件的搜索控制单元（诸如搜索控制单元725），搜索器（诸如搜索器705），其包括多路复用器，该多路复用器可以选择 基于假设和启动和停止条件的接收序列的样本。 搜索控制单元然后可以等待发生起始条件，并将假设分配给相关器，该相关器将基于假设将样本子集与本地生成的伪随机数序列相关联。

公开(公告)号：US07474688B2

公开(公告)日：2009-01-06

申请号：US10651282

申请日：2003-08-28

申请人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar

发明人： John G. McDonough ,  Gibong Jeong ,  Karim Abdulla ,  Rajiv R. Nambiar

IPC分类号： H04B1/00

CPC分类号： H04B1/708 ,  H04B2201/70711 ,  H04J13/0044 ,  H04J13/12

摘要： System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher. A preferred embodiment comprises the specification of a hypothesis for a particular communications network. The hypothesis can then be used to generate a pseudo-random number (PN) sequence that is provided to a searcher. The searcher can then make adjustments to the PN sequence to bring the PN sequence to conformity with requirements of the particular communications network. The adjustment to the PN sequence permits the use of a multi-mode searcher to perform searches for signals of various communications networks with minimal hardware dedicated to each communications network.

摘要翻译： 使用多模式搜索器检测多个直接序列扩频信号的系统和方法。 优选实施例包括对特定通信网络的假设的规定。 然后可以使用该假设来产生提供给搜索者的伪随机数（PN）序列。 然后，搜索者可以对PN序列进行调整，使PN序列符合特定通信网络的要求。 对PN序列的调整允许使用多模式搜索器以专用于每个通信网络的最小硬件来执行各种通信网络的信号的搜索。

公开(公告)号：US07366201B2

公开(公告)日：2008-04-29

申请号：US10120954

申请日：2002-04-11

申请人： John G. McDonough ,  Douglas R. Walby ,  Karim Abdulla

发明人： John G. McDonough ,  Douglas R. Walby ,  Karim Abdulla

IPC分类号： H04J13/00 ,  H04B1/69

CPC分类号： H04B1/707 ,  H04B2201/70707

摘要： A vector-based sequence generator (100) provides for a general architecture that can be easily adapted to any random length sequence and any random number of bits per access. The sequence generator (100) can also produce a new access on every hardware clock cycle, thereby maximizing the efficiency of the bit sequence requesting process.

摘要翻译： 基于向量的序列生成器（100）提供可以容易地适应于任何随机长度序列和每次访问的任意随机数的位的一般架构。 序列发生器（100）还可以在每个硬件时钟周期上产生新的访问，从而最大化比特序列请求过程的效率。

公开(公告)号：US07839762B2

公开(公告)日：2010-11-23

申请号：US10121467

申请日：2002-04-11

申请人： John G. McDonough ,  Douglas R. Walby ,  Karim Abdulla

发明人： John G. McDonough ,  Douglas R. Walby ,  Karim Abdulla

IPC分类号： H04J11/00

CPC分类号： H04J13/12 ,  H04J13/0048

摘要： A vector-based Walsh code sequence generator provides for a general architecture that can be easily adapted to any random length sequence and any random number of bits per access. The Walsh code sequence generator can produce a new access on every hardware clock cycle, thereby maximizing the efficiency of the bit sequence requesting process.

摘要翻译： 基于向量的沃尔什码序列发生器提供了可以容易地适应于任何随机长度序列和每次访问的任意随机位数的通用架构。 沃尔什码序列发生器可以在每个硬件时钟周期产生新的访问，从而最大化比特序列请求过程的效率。

公开(公告)号：US07295632B2

公开(公告)日：2007-11-13

申请号：US10392511

申请日：2003-03-20

申请人： John G. McDonough ,  Jane Wang ,  Gibong Jeong ,  Der-Chieh Koon

发明人： John G. McDonough ,  Jane Wang ,  Gibong Jeong ,  Der-Chieh Koon

IPC分类号： H04L27/06

CPC分类号： H04L1/0071 ,  H04B7/2643 ,  H04L1/0045 ,  H04L1/0068

摘要： System and method for decoding punctured subframes. A preferred embodiment comprises a first deinterleaver unit (for example, 5-ms deinterleaver 502) and a second deinterleaver unit (for example, 20-ms deinterleaver 504) operating in parallel, deinterleaving one symbol stream using 5- and 20-ms duration frame formats, for example. After the reception of each 5-ms subframe, the subframe is decoded in a decode unit (for example, rate matching, decoding, and CRC checking (RDC) unit 530) to verify that the subframe contains 5 ms duration frame data. If so, the subframe is noted. If all 5-ms subframes in a 20-ms duration frame contain 5-ms duration data, no decoding of results by the second deinterleaver unit is needed. If the entire 20-ms duration frame is not all 5-ms duration data, then the 5-ms duration data subframes are zeroed and the remaining data is decoded as 20-ms duration data.

摘要翻译： 用于解码穿孔子帧的系统和方法。 优选实施例包括并行操作的第一解交织器单元（例如，5ms解交织器502）和第二解交织器单元（例如，20ms解交织器504），使用5和20ms持续时间帧解交织一个符号流 格式，例如。 在每个5ms子帧的接收之后，子帧在解码单元（例如，速率匹配，解码和CRC校验（RDC）单元530）中解码）以验证子帧包含5ms持续时间帧数据。 如果是，则注意子帧。 如果20毫秒持续时间帧中的所有5毫秒子帧都包含5毫秒持续时间数据，则不需要第二个解交织器单元对结果的解码。 如果整个20毫秒持续时间帧不是全部5毫秒持续时间数据，那么5毫秒持续时间数据子帧被归零，剩余的数据被解码为20毫秒持续时间数据。

公开(公告)号：US06559714B2

公开(公告)日：2003-05-06

申请号：US09820050

申请日：2001-03-28

申请人： Edwin Park ,  John G. McDonough

发明人： Edwin Park ,  John G. McDonough

IPC分类号： H03K500

CPC分类号： H03H1/02

摘要： A signal filter employs digital control signals to selectively establish and adjust analog impedance components of the filter. In the case of a first-order R-C filter, adjustable resistance and reactance assemblies are coupled in series. The resistance assembly has multiple parallel signal paths sharing a common input and output. Each signal path includes a prescribed electrical resistance and a digital switch to selectively enable and disable the resistance. Between the common input and output, the signal paths provide a collective resistance which varies depending upon which switches have been activated. The reactance assembly is similar to the resistance assembly, with capacitors or inductors instead of resistors. A digital controller selectively activates the switches to adjust the assemblies' respective resistance and reactance.

公开(公告)号：US06452959B1

公开(公告)日：2002-09-17

申请号：US09322373

申请日：1999-05-28

申请人： John G. McDonough

发明人： John G. McDonough

IPC分类号： H04B169

CPC分类号： H04J13/0022 ,  H04B1/707 ,  H04J13/10

摘要： A method of generating one or more pseudorandom noise (PN) sequences for use in spread spectrum communications includes the steps of providing data at an input of memory which stores bits associated with a pseudorandom noise (PN) sequence: changing the data; and for each of a plurality of changes of the data, providing a selected PN bit of the PN sequence at an output of the memory based on the data.

摘要翻译： 一种产生用于扩展频谱通信的一个或多个伪随机噪声（PN）序列的方法包括以下步骤：在存储与伪随机噪声（PN）序列相关联的位的存储器的输入端提供数据：改变数据; 并且对于数据的多个改变中的每一个，基于该数据在存储器的输出处提供PN序列的选择的PN位。

公开(公告)号：US07403507B2

公开(公告)日：2008-07-22

申请号：US09883740

申请日：2001-06-18

申请人： John G. McDonough ,  Juncheng C. Liu ,  Yan Hui ,  Chunhao Chen

发明人： John G. McDonough ,  Juncheng C. Liu ,  Yan Hui ,  Chunhao Chen

IPC分类号： H04B7/216

CPC分类号： H04B1/70756 ,  H04B2201/70709

摘要： A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at arbitrary points in time while still maintaining accurate base station system time. Accurate timing is made possible through a number of techniques including precise initial calibration using a rising edge/falling edge averaging system, determining the sleep clock and reference clock frequencies, and the determination of the frequency drift of the sleep clock that occurred during the previous sleep interval.

摘要翻译： 提供一种睡眠控制系统和方法，其允许移动台接收机中的参考时钟和直接序列扩频（DSSS）调制解调器在任意时间点被关闭并重新接通，同时仍保持精确的基站系统时间。 通过包括使用上升沿/下降沿平均系统的精确初始校准，确定睡眠时钟和参考时钟频率以及确定在先前睡眠期间发生的睡眠时钟的频率漂移的许多技术，可以实现准确的定时 间隔。