System and method for intelligent processing of results from search of direct sequence spread spectrum (DSSS) signals
    1.
    发明授权
    System and method for intelligent processing of results from search of direct sequence spread spectrum (DSSS) signals 有权
    用于智能处理直接序列扩频(DSSS)信号搜索结果的系统和方法

    公开(公告)号:US07295598B2

    公开(公告)日:2007-11-13

    申请号:US10439400

    申请日:2003-05-16

    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。

    Searching in a spread spectrum communications
    2.
    发明授权
    Searching in a spread spectrum communications 有权
    搜索扩频通信

    公开(公告)号:US07298777B2

    公开(公告)日:2007-11-20

    申请号:US10455020

    申请日:2003-06-06

    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。

    System and method for performing symbol boundary-aligned search of direct sequence spread spectrum signals
    3.
    发明授权
    System and method for performing symbol boundary-aligned search of direct sequence spread spectrum signals 有权
    用于执行直接序列扩频信号的符号边界对齐搜索的系统和方法

    公开(公告)号:US07324585B2

    公开(公告)日:2008-01-29

    申请号:US10650427

    申请日:2003-08-28

    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。

    System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher
    4.
    发明授权
    System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher 有权
    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

    公开(公告)号:US07474688B2

    公开(公告)日:2009-01-06

    申请号:US10651282

    申请日:2003-08-28

    IPC分类号: H04B1/00

    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。

    Method and apparatus for decoding punctured subframes
    5.
    发明授权
    Method and apparatus for decoding punctured subframes 有权
    用于解码穿孔子帧的方法和装置

    公开(公告)号:US07295632B2

    公开(公告)日:2007-11-13

    申请号:US10392511

    申请日:2003-03-20

    IPC分类号: H04L27/06

    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。

    Sparse maximum likelihood decoder for block codes
    6.
    发明授权
    Sparse maximum likelihood decoder for block codes 有权
    块代码的稀疏最大似然解码器

    公开(公告)号:US07600179B2

    公开(公告)日:2009-10-06

    申请号:US10601384

    申请日:2003-06-23

    IPC分类号: H03M13/03

    摘要: A method is provided to decode data encoded by any block code in a manner that substantially improves the error correction capability of the block codes, and that is independent of the encoder. The structure associated with the method desirably allows the testing of those hypotheses that are known to exist, such that one can use the a priori knowledge of the possible set of hypotheses to only search from among them. The method of decoding data is both advantageous and desirable since knowing the subset of the code word space that is being utilized in essence allows the distance between the code words to be increased yielding significant decoding benefits.

    摘要翻译: 提供了一种方法来解码由任何块码编码的数据,其方式使得块码的纠错能力大大提高,并且独立于编码器。 与该方法相关联的结构期望允许测试已知存在的那些假设,使得可以使用先验知识可能的假设集合来仅从其中搜索。 解码数据的方法是有利的和期望的,因为知道正在使用的码字空间的子集本质上允许增加码字之间的距离,从而产生显着的解码优点。

    Symbol detecting with large frequency error
    8.
    发明授权
    Symbol detecting with large frequency error 有权
    具有大频率误差的符号检测

    公开(公告)号:US07292652B2

    公开(公告)日:2007-11-06

    申请号:US10690032

    申请日:2003-10-21

    IPC分类号: H03K9/00

    摘要: System and method for detecting symbols wherein there may be a large frequency error. A preferred embodiment includes receiving an estimated frequency error, calculating a vector based on the estimated frequency error, buffering symbols from two symbol streams, rotating the symbols from the two symbol streams using the vector, estimating a channel gain for the symbols in the second symbol stream, and applying the channel gain to the rotated symbols from the second symbol stream.

    摘要翻译: 用于检测符号的系统和方法,其中可能存在较大的频率误差。 优选实施例包括接收估计的频率误差,基于所估计的频率误差来计算矢量,从两个符号流缓冲符号,使用向量从两个符号流旋转符号,估计第二符号中的符号的信道增益 流,并且将信道增益应用于来自第二符号流的旋转符号。

    System and method for finger and path management in receivers
    9.
    发明申请
    System and method for finger and path management in receivers 有权
    接收机中手指和路径管理的系统和方法

    公开(公告)号:US20050105599A1

    公开(公告)日:2005-05-19

    申请号:US10716957

    申请日:2003-11-19

    IPC分类号: H04B1/69 H04B1/707

    CPC分类号: H04B1/7117 H04B1/7113

    摘要: System and method for managing finger and path resources. A preferred embodiment comprises receiving a delay profile, processing paths from the delay profile, placing the processed paths into a plurality of sets based on path criteria, and assigning the placed processed paths to demodulating fingers. A preferred embodiment further comprises the use of historical information on paths in the placing.

    摘要翻译: 用于管理手指和路径资源的系统和方法。 优选实施例包括接收延迟分布,根据延迟分布处理路径,基于路径准则将经处理的路径放置成多个集合,以及将所处理的路径分配给解调手指。 优选实施例还包括在放置中的路径上使用历史信息。