公开(公告)号：US20130121251A1

公开(公告)日：2013-05-16

申请号：US13680845

申请日：2012-11-19

申请人： James A. Proctor, JR. ,  Antoine J. Rouphael ,  John E. Hoffman ,  George Rodney Nelson, JR.

发明人： James A. Proctor, JR. ,  Antoine J. Rouphael ,  John E. Hoffman ,  George Rodney Nelson, JR.

IPC分类号： H04W56/00

CPC分类号： H04W56/001 ,  H04B1/7075 ,  H04B1/70775 ,  H04B1/7103 ,  H04B7/086 ,  H04B2201/70701 ,  H04L27/2273 ,  H04L2027/0057 ,  H04L2027/0087

摘要： A wireless transmit-receive unit includes an antenna, detection circuitry configured to detect a pseudorandom (PN) offset of a pilot signal received by the antenna while the antenna is adapted to an omnidirectional receive pattern, and monitoring circuitry configured to monitor a received signal strength of the pilot signal as a directional receive pattern of the antenna is steered in order to determine an azimuth angle of the directional pattern that maximizes the pilot signal at the detected PN offset.

摘要翻译： 无线发射 - 接收单元包括天线，检测电路，被配置为检测由天线接收的导频信号的伪随机（PN）偏移，同时天线适于全向接收模式;以及监视电路，被配置为监视接收信号强度 作为天线的定向接收模式的导频信号被控制，以便确定在检测到的PN偏移处使导频信号最大化的方向图的方位角。

公开(公告)号：US08218605B2

公开(公告)日：2012-07-10

申请号：US11564607

申请日：2006-11-29

申请人： Zhaocheng Wang ,  Masahiro Uno

发明人： Zhaocheng Wang ,  Masahiro Uno

IPC分类号： H04B1/00

CPC分类号： H04J13/0022 ,  H04B1/70775 ,  H04J13/107

摘要： A method for generating a preamble signal for a wireless communication system including the step of combining a plurality of different short PN sequences into a long PN sequence, wherein one of the plurality of short PN sequences includes information that is configured for coarse timing synchronization, and the long PN sequence includes information that is configured for fine timing synchronization.

摘要翻译： 一种用于生成用于无线通信系统的前导码信号的方法，包括将多个不同的短PN序列组合成长PN序列的步骤，其中所述多个短PN序列中的一个包括被配置用于粗定时同步的信息，以及 长PN序列包括配置用于精细定时同步的信息。

公开(公告)号：US07558314B2

公开(公告)日：2009-07-07

申请号：US10527896

申请日：2003-08-29

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04B1/707

CPC分类号： H04B1/7075 ,  H04B1/70755 ,  H04B1/70775

摘要： The present invention relates to a method (and corresponding device) of detecting a first signal in a received signal using a pattern, the received signal comprising at least one signal group, each signal group comprising a number of signal symbols, the pattern comprising at least one pattern group, each pattern group comprising at least a number of pattern symbols, wherein the method comprises the steps of for each signal group multiplying each signal symbol with a corresponding pattern symbol of a pattern group and deriving a sum of the products of multiplication, applying a weight factor of one or more weight factors to each sum giving a weighted sum, where said one or more weight factors are selected to preserve an orthogonality relation of said pattern symbols of the least one pattern group, and determining if a signal is detected or not based on said one or more weighted sums.

摘要翻译： 本发明涉及一种使用模式检测接收信号中的第一信号的方法（和相应的装置），所述接收信号包括至少一个信号组，每个信号组包括多个信号符号，所述图案至少包括 每个图案组包括至少多个图案符号，其中所述方法包括以下步骤：对于每个信号组，将每个信号符号与模式组的相应模式符号相乘，并导出乘法乘积的和， 对给予加权和的每个总和应用一个或多个加权因子的权重因子，其中选择所述一个或多个权重因子以保持所述至少一个模式组的所述模式符号的正交关系，并且确定是否检测到信号 或者不基于所述一个或多个加权和。

公开(公告)号：US20090010239A1

公开(公告)日：2009-01-08

申请号：US11773772

申请日：2007-07-05

申请人： Hsin-chung Yeh ,  Zong-hua You

发明人： Hsin-chung Yeh ,  Zong-hua You

IPC分类号： H04B7/216

CPC分类号： H04B1/7085 ,  G01S19/29 ,  H04B1/70775

摘要： A method for controlling integration for a CDMA signal and a receiver implementing the same. In accordance with the present invention, non-coherent and even coherent integration periods for a received signal are dynamically and adaptively controlled depending upon the condition of the received signal. The integration period can be very short when signal strength is strong and no blocking exists; while it can be extended to be longer when the signal strength is weak or there is a blocking. Therefore, it is possible to keep locking even under bad circumstances. In addition, the fix time can be shortened when the signal strength is very strong.

摘要翻译： 一种用于控制CDMA信号的集成的方法和实现该信号的接收机。 根据本发明，接收信号的非相干和均匀一致的积分周期根据接收到的信号的状况被动态和自适应地控制。 当信号强度强且不存在阻塞时，积分周期可能很短; 而当信号强度较弱或存在阻塞时，它可以扩展到更长的时间。 因此，即使在不良情况下也可以保持锁定。 此外，当信号强度非常强时，可以缩短固定时间。

公开(公告)号：US20070160120A1

公开(公告)日：2007-07-12

申请号：US11330122

申请日：2006-01-12

申请人： Robert Simpson

发明人： Robert Simpson

IPC分类号： H04B1/00

CPC分类号： H04B1/70757 ,  G01S19/30 ,  H04B1/7077 ,  H04B1/70775 ,  H04B2001/70706 ,  H04B2201/70715

摘要： An embodiment generally relates to a method of processing direct-sequence spread spectrum signals for temporal alignment between a received direct sequence spread spectrum (DSSS) signal and a local reference signal. The method includes receiving the received DSSS signal with bandwidth to resolve at least N samples per code chip and de-spreading the received DSSS signal to recover an elemental waveform within the received DSSS signal for an interval greater than one code chip interval as a first processing stage. The method also includes determining a discriminator value based on the elemental waveform as a second processing stage and operating a delay-locked loop based on the discriminator value to adjust an alignment between the received DSSS signal and the local reference signal.

摘要翻译： 一个实施方案通常涉及一种处理直接序列扩频信号以在接收到的直接序列扩频（DSSS）信号和本地参考信号之间进行时间对准的方法。 该方法包括以带宽的方式接收所接收的DSSS信号，以便每个码片分解至少N个采样，并对接收到的DSSS信号进行解扩，以便在接收到的DSSS信号中恢复大于一个码片片段间隔的元素波形作为第一处理 阶段。 该方法还包括基于元素波形确定鉴别器值作为第二处理级，并且基于鉴别器值操作延迟锁定环以调整所接收的DSSS信号与本地参考信号之间的对准。

公开(公告)号：USRE39540E1

公开(公告)日：2007-04-03

申请号：US10691432

申请日：2003-10-23

申请人： Dotan Sokolov ,  David Ben-Eli

发明人： Dotan Sokolov ,  David Ben-Eli

IPC分类号： H04B1/69

CPC分类号： H04B1/70775 ,  H04B1/70756 ,  H04B1/708 ,  H04B1/709 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

摘要： A searcher for a mobile station of a cellular telephony network. Pilot signal from nearby base stations are correlated with a pseudonoise sequence inside a search window, using a bank of correlators. Each correlator is assigned a different delay, from among a sequence of delays in the window. At each delay, correlation is performed initially for a first dwell time. If the resulting correlation value exceeds a threshold, the correlation is continued for a second dwell time. Otherwise, the correlator is set to the next delay in the sequence. Only the outputs of second dwell correlations are used to identify the nearest base station. Some correlators may perform first dwell correlations at new delays in the window at the same time that other correlators are still performing second dwell correlations at old delays in the window.

摘要翻译： 用于蜂窝电话网络的移动台的搜索器。 使用一组相关器，来自附近基站的导频信号与搜索窗口内的伪噪声序列相关。 从窗口中的延迟序列中分配每个相关器不同的延迟。 在每个延迟下，首先在第一停留时间执行相关性。 如果所得到的相关值超过阈值，则相关性继续进行第二停留时间。 否则，相关器被设置为序列中的下一个延迟。 仅使用第二停留相关的输出来识别最近的基站。 一些相关器可以在窗口中的新延迟处执行第一暂停相关，同时其他相关器仍然在窗口中的旧延迟中执行第二驻留相关性。

公开(公告)号：US20060227855A1

公开(公告)日：2006-10-12

申请号：US10540677

申请日：2003-12-18

申请人： Luzhou Xu ,  Dong Wang ,  Pu Xu

发明人： Luzhou Xu ,  Dong Wang ,  Pu Xu

IPC分类号： H04B1/00

CPC分类号： H04B1/70758 ,  H04B1/70775

摘要： A cell-searching method and device for a mobile terminal in TDD-CDMA system, in which the mobile uses the special power pulse of using the downlink pilot slot (DwPTS) to acquire coarse synchronization before using conventional correlation cell searching to refine the search. Due to the coarse synchronization, the conventional correlation cell search can be limited to a narrow time window. So the cell searching complexity and searching time in the TDD-CDMA system, especially TD-SCDMA decrease greatly.

摘要翻译： 在TDD-CDMA系统中的移动终端的小区搜索方法和装置，其中移动台在使用常规的相关小区搜索之前使用下行链路导频时隙（DwPTS）的特殊功率脉冲获取粗同步，从而完善搜索。 由于粗略的同步，常规的相关单元搜索可以被限制在窄的时间窗口。 因此，在TDD-CDMA系统中，特别是TD-SCDMA的小区搜索复杂度和搜索时间大大降低。

公开(公告)号：US06954485B1

公开(公告)日：2005-10-11

申请号：US09677775

申请日：2000-10-03

申请人： Takeshi Hashimoto ,  Yuichi Maruyama

发明人： Takeshi Hashimoto ,  Yuichi Maruyama

IPC分类号： H04B1/707 ,  H04B1/7083 ,  H04B7/26 ,  H04L7/00 ,  H04W56/00 ,  H04B1/69 ,  H04B7/216

CPC分类号： H04B1/70775 ,  H04B1/70756 ,  H04B1/7083 ,  H04B2201/70702

摘要： A CDMA baseband receiver includes a first correlating unit, a long code phase candidate outputting section and a long code determining section. The first correlating unit calculates first correlation values from a spread modulation signal and a short code which is common to base stations. The long code phase candidate outputting section outputs selected long code phase candidates corresponding to ones selected from the first correlation values, based on the spread modulation signal, and determined long codes. The selected long code phase candidates are other than long code phase candidates for known ones of the base stations. The long code determining section generates the determined long codes for unknown ones of the base stations from the spread modulation signal, the short code, and long codes generated based on the selected long code phase candidates. Each long code is peculiar to one base station.

摘要翻译： CDMA基带接收机包括第一相关单元，长码相位候选输出单元和长码确定单元。 第一相关单元从扩展调制信号和基站公共的短码计算第一相关值。 长码相位候选输出部分基于扩展调制信号和确定的长码，输出与从第一相关值中选择的那些相对应的选择的长码相位候选。 所选择的长码相位候选不同于已知基站的长码相位候选。 长码确定部分从扩展调制信号，短码和基于所选择的长码相位候选生成的长码产生对于未知基站的确定的长码。 每个长码是一个基站特有的。

公开(公告)号：US20040179585A1

公开(公告)日：2004-09-16

申请号：US10809361

申请日：2004-03-26

申请人： GOLDEN BRIDGE TECHNOLOGY INC.

发明人： Gang Yang ,  Don Li

IPC分类号： H04B001/707

CPC分类号： H04B1/70751 ,  H04B1/70752 ,  H04B1/70775 ,  H04B1/7093 ,  H04B1/7095

摘要： Multi-path effects are common in mobile communications. When coupled with spread-spectrum signals utilizing spreading code sequences, detection of more than one multi-path signal becomes a necessity in order to output a clean signal with little loss. In accord with the invention, a spread-spectrum sliding matched-filter searcher system comprises a partial matched-filter that receives the input spread-spectrum signal. The searcher matches samples of the input signal with a tap length m of the reference code and produces a first correlation value. The first correlation value is compared to a first threshold. When it equals or exceeds the first threshold, the first correlation value is integrated to produce a second correlation value. This second value is compared with a second threshold, which if met signifies the detection of the multi-path signal. The process is repeated until all significant multi-path signals are detected. This design of the present invention is flexible in nature because the searcher can be programmed to act like a matched-filter, a correlator, or a combination of both while significantly improving the search time and reducing the amount of hardware and complexity characteristic of a matched-filter.

公开(公告)号：US20030193922A1

公开(公告)日：2003-10-16

申请号：US10318450

申请日：2002-12-13

发明人： Jan-Shin Ho ,  Wern-Ho Sheen

IPC分类号： H04B007/216

CPC分类号： H04B1/70775 ,  H04B1/70735 ,  H04B1/70757 ,  H04B1/7083

摘要： The present invention discloses a cell search method for a CDMA system, using a three-stage cell search. The method comprises matching an incoming signal from the base station, wherein the frequency of the incoming signal having an uncertain range; over-sampling the incoming signal N times against a chip rate and outputting the N over-samples; down-sampling the incoming signal and outputting N over-samples to a first stage, a second stage and a third stage. The first stage further comprises selecting a first group of slot boundaries as a first group of candidates after pre-selection, and the first group of candidates transmitting to a deciding selection stage of the first stage and the second stage to be continuously processed. The cell search method of the present invention can be used to reduce the effect of clock offset on the performance of cell search and to accomplish fast cell search.

摘要翻译： 本发明公开了一种使用三阶段小区搜索的CDMA系统的小区搜索方法。 该方法包括：匹配来自基站的输入信号，其中输入信号的频率具有不确定的范围; 对码片速率进行N次过采样，并输出N个过采样; 对进入的信号进行下采样并将N个过采样输出到第一阶段，第二阶段和第三阶段。 第一级还包括：在预先选择之后，选择第一组时隙边界作为第一组候选，并且将第一组候选发送到要连续处理的第一阶段和第二阶段的决定选择阶段。 本发明的小区搜索方法可以用于减少时钟偏移对小区搜索的性能的影响并实现快速小区搜索。