公开(公告)号：WO2020188912A1

公开(公告)日：2020-09-24

申请号：PCT/JP2019/048446

申请日：2019-12-11

Applicant: 株式会社JVCケンウッド

Inventor： 有田　懐人

IPC: H04L7/04 ,  H04B1/7075 ,  H04L7/00 ,  H04L27/14

Abstract: 同期タイミング検出装置は、１シンボル期間をｍ（ｍは自然数）倍でオーバーサンプリングされた受信信号と、既知の同期用パターンとの相関値Ｒをｍ／ｎサンプルずつずらして算出して出力するｎ個（ｎは３≦ｎ≦ｍ、ｎは自然数かつｍの約数）の相関器（３１－１，３１－２，３１－３，３１－４）と、ｎ個の相関器（３１－１，３１－２，３１－３，３１－４）から出力される相関値Ｒｎの各々を極座標上に角度２π（ｎ／ｍ）としてあてはめたｎ個の相関値ベクトルとし、ｎ個の相関値ベクトルを合成し、合成したベクトルの角度を算出する演算部（３２）と、演算部が算出したベクトルの角度に基づいて、受信信号のシンボルタイミングを推定するシンボルタイミング推定部（３３）と、を備える。

公开(公告)号：WO2015142570A1

公开(公告)日：2015-09-24

申请号：PCT/US2015/019654

申请日：2015-03-10

Applicant: QUALCOMM INCORPORATED

Inventor： BATCHU, Bhaskara Viswanadham ,  TSAI, Stanley Suyi ,  KUMAR, Pravir

IPC: H04W48/18 ,  H04B1/7075 ,  H04J11/00 ,  H04L27/26 ,  H04W88/06

CPC classification number: H04W72/0453 ,  H04B1/3816 ,  H04J11/0069 ,  H04L27/2655 ,  H04W24/02 ,  H04W48/18 ,  H04W56/0035 ,  H04W88/06

Abstract: Methods and apparatus for improving system acquisition performance in multi-SIM devices are provided. In one aspect, a method of acquiring a signal comprises defining a size of a frequency bin for a first radio access technology based on a frequency error for a second radio access technology. The method further includes determining that the signal is not acquirable using the defined size for a predetermined number of consecutive acquisition attempts. The method further includes adjusting the size of the frequency bin based on the determining. The method further includes determining whether the signal is not acquirable using the adjusted size. In one implementation, the method further includes identifying the frequency error for the second radio access technology. In one implementation, the adjusting the size of the frequency bin comprises disregarding the frequency error for the second radio access technology. In one implementation the adjusting the size of the frequency bin is based on a most recently received frequency error for the first radio access technology.

Abstract translation: 提供了提高多SIM设备系统采集性能的方法和设备。 一方面，获取信号的方法包括基于第二无线电接入技术的频率误差来定义用于第一无线接入技术的频率仓的大小。 该方法还包括使用所定义的大小来确定信号是不可获取的，用于预定数量的连续采集尝试。 该方法还包括基于确定来调整频率仓的大小。 该方法还包括使用调整的大小来确定信号是否不可获取。 在一个实现中，该方法还包括识别第二无线电接入技术的频率误差。 在一个实现中，调整频率仓的大小包括忽略第二无线电接入技术的频率误差。 在一个实现中，调整频率仓的大小基于第一无线电接入技术的最近接收的频率误差。

公开(公告)号：WO2014109792A1

公开(公告)日：2014-07-17

申请号：PCT/US2013/053484

申请日：2013-08-02

Applicant: QUALCOMM INCORPORATED

Inventor： HSU, Chun-Hao ,  DUA, Aditya ,  YEE, Nathan Dingsai ,  GUPTA, Abhinav

IPC: H04B1/7075 ,  H04B1/7107 ,  H04B1/7115

CPC classification number: H04L27/01 ,  H04B1/70754 ,  H04B1/7107 ,  H04B1/7115 ,  H04B2201/70722 ,  H04B2201/70724

Abstract: One or more aspects of the disclosure provide an efficient equalization scheme capable of mitigating multi-path interference on channels with large delay spread using short-length equalizers. That is, by dividing stored samples of a signal received on the multi-path channel by time into a plurality of clusters, a short-length equalizer can be utilized in an iterative fashion on each of the clusters, thus eliminating the need for a large length equalizer while still providing improved performance over that of a Rake receiver at large delay spreads. Other aspects, embodiments, and features are also claimed and described.

Abstract translation: 本公开的一个或多个方面提供了一种有效的均衡方案，其能够使用短长度均衡器来减轻具有大延迟扩展的信道上的多径干扰。 也就是说，通过将多路径信道上接收到的信号的时间的样本存储为多个簇，可以在每个簇上以迭代的方式使用短长度均衡器，因此不需要大量的 长度均衡器，同时在大延迟传播方面仍然提供比耙式接收机更好的性能。 还要求和描述其它方面，实施例和特征。

公开(公告)号：WO2013152329A1

公开(公告)日：2013-10-10

申请号：PCT/US2013/035519

申请日：2013-04-05

Applicant: QUALCOMM INCORPORATED

Inventor： CHIZGI, Nate ,  ZHANG, Wei ,  GOPALAN, Ravi ,  KASTURI, Nitin

IPC: H04W52/24 ,  H04W52/08 ,  H04B1/7117 ,  H04J11/00 ,  H04B1/7075

CPC classification number: H04W52/04 ,  H04B1/70754 ,  H04B1/7117 ,  H04J11/0069 ,  H04W52/08 ,  H04W52/241 ,  H04W56/005

Abstract: Methods and apparatuses for wireless communication include determining whether to move a receive window by more than a change in an uplink transmit timing of a user equipment (UE). The methods and apparatuses further include moving the receive window by an amount larger than the change in the uplink transmit timing when a determination is made to move the receive window by more than the change in the uplink transmit timing. Moreover, the methods and apparatuses include identifying at least one cell with receive time within the receive window at the UE.

Abstract translation: 用于无线通信的方法和装置包括确定是否将接收窗口移动多于用户设备（UE）的上行链路发送定时的变化。 所述方法和装置还包括当确定使接收窗口移动多于上行链路发送定时的变化时，将接收窗口移动大于上行链路发送定时的变化量。 此外，所述方法和装置包括在UE的接收窗口内识别具有接收时间的至少一个小区。

公开(公告)号：WO2013140909A1

公开(公告)日：2013-09-26

申请号：PCT/JP2013/053888

申请日：2013-02-18

Applicant: 古野電気株式会社

Inventor： 大杉　明弘 ,  王　盾 ,  多田　一登

IPC: G01S19/29 ,  G01S19/21 ,  H04B1/7075

CPC classification number: G01S19/29

Abstract: 【課題】従来方法よりも短いサーチ時間で、より正確に目的のＧＰＳ信号を捕捉する。 【解決手段】追尾中のＧＰＳ信号の周波数ＦＢを取得する（Ｓ１０１）。当該周波数ＦＢから積算時間変更用の周波数区間を設定する（Ｓ１０２）。予備サーチで検出された信号の検出結果を用いて、周波数区間毎に積算時間を決定する（Ｓ１０３，Ｓ１０４）。サーチ周波数Ｆ ｓｉｇ がいずれの周波数区間に該当するか判定し、サーチ周波数Ｆ ｓｉｇ 毎に積算時間を決定し、積算相関値を算出する（Ｓ１０５）。　

Abstract translation: [问题]为了在比现有技术的方法更短的搜索时间内更准确地捕获目标全球定位系统（GPS）信号。 [解决方案]在跟踪期间获取GPS信号的频率（FB）（S101）。 从频率（FB）建立积分时间变化的频率间隔（S102）。 使用在初步搜索中检测到的信号的检测结果来确定每个频率间隔的积分时间（S103，S104）。 确定搜索频率（Fsig）是否属于任何频率间隔，针对每个搜索频率（Fsig）确定积分时间，并计算积分相关值（S105）。

公开(公告)号：WO2011106786A1

公开(公告)日：2011-09-01

申请号：PCT/US2011/026531

申请日：2011-02-28

Applicant: QUALCOMM INCORPORATED ,  CHALLA, Raghu N. ,  SRINIVASAN, Shivratna G.

Inventor： CHALLA, Raghu N. ,  SRINIVASAN, Shivratna G.

IPC: H04B1/7075

CPC classification number: H04J3/0608 ,  H04B1/70755 ,  H04J1/16 ,  H04J4/00

Abstract: In a wireless communication system employing frequency division duplexing (FDD) that may be synchronous or asynchronous for transmitting data, in which the underlying Rx signals have different statistics, and where the hypothesis testing is degraded thereby, the improvement of generating a complementary searcher metric that is a noise metric (NM) comprising: projecting the Rx signals into the noise subspace of a pilot sequence.

Abstract translation: 在采用频分双工（FDD）的无线通信系统中，其可以是用于发送数据的同步或异步的，其中底层Rx信号具有不同的统计信息，并且其中假设测试由此降低，从而提高生成互补搜索器度量， 是噪声度量（NM），包括：将Rx信号投影到导频序列的噪声子空间中。

公开(公告)号：WO03015307A3

公开(公告)日：2003-08-07

申请号：PCT/US0225470

申请日：2002-08-08

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  NEUFELD ARTHUR JAMES

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/709 ,  H04B1/707

CPC classification number: H04B1/70751 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/709 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: Systems and techniques are disclosed wherein a gated pilot signal can be acquired by searching for a first gated pilot signal, deriving timing information from the search for the first gated pilot signal, and searching for a second gated pilot signal using the timing information. This can be implemented in a variety of fashions including a receiver with a searcher configured to generate a bit sequence, a correlator configured to correlate a received signal with the bit sequence, and a processor configured to detect a first gated pilot signal as a function of the correlation, derive timing information from the first gated pilot signal, and detect a second gated pilot signal by using the timing information to control the bit sequence generated by the searcher.

Abstract translation: 公开了系统和技术，其中可以通过搜索第一选通导频信号，从搜索第一选通导频信号导出定时信息，并且使用定时信息搜索第二选通导频信号来获取选通导频信号。 这可以以各种方式来实现，包括具有被配置为生成比特序列的搜索器的接收器，被配置为将接收到的信号与比特序列相关的相关器，以及被配置为检测第一选通导频信号作为 相关性，从第一门控导频信号导出定时信息，并且通过使用定时信息来检测第二门控导频信号，以控制由搜索器生成的比特序列。

公开(公告)号：WO03003807A3

公开(公告)日：2003-06-12

申请号：PCT/US0220239

申请日：2002-06-25

Applicant: GLOBAL LOCATE INC

Inventor： ABRAHAM CHARLES ,  FUCHS DONALD L

IPC: G01S1/00 ,  G01S1/04 ,  G01S19/25 ,  G01S19/27 ,  G01S19/30 ,  G01S19/37 ,  G06F17/15 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/709 ,  H04B1/707

CPC classification number: G06F17/15 ,  G01S1/045 ,  G01S5/0205 ,  G01S19/22 ,  G01S19/235 ,  G01S19/25 ,  G01S19/254 ,  G01S19/256 ,  G01S19/29 ,  G01S19/30 ,  G01S19/37 ,  H04B1/70752 ,  H04B1/7077 ,  H04B1/709 ,  H04B2201/70715

Abstract: A method and apparatus for computing a convolution 109 between an input GPS signal 101 and a C/A code reference 1-32 by generating the convolution result in real time without storing unprocessed signal samples. The method and apparatus is capable of operating in multiple modes 104n of resolution so as to enhance the sensitivity of the convolution processing.

Abstract translation: 一种用于通过在不存储未处理的信号样本的情况下实时产生卷积结果来计算输入GPS信号101和C / A码参考1-32之间的卷积109的方法和装置。 该方法和装置能够以分辨率的多种模式104n操作，以便提高卷积处理的灵敏度。

公开(公告)号：WO0241513A3

公开(公告)日：2002-10-10

申请号：PCT/EP0113311

申请日：2001-11-14

Applicant: KONINKL PHILIPS ELECTRONICS NV

Inventor： BANERJEE DEBARAG N

IPC: H04B1/7075 ,  H04Q7/38 ,  H04B1/707

CPC classification number: H04B1/70754 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: An example application of the invention is directed to a mobile receiver searching pilot signals in a CDMA-based radiotelephone communications system. The receiver processes received pilot signals by first decimating those pilot signals that have a search window length that is greater than a threshold number of chips, into a plurality of sub-windows. The other pilot signals and the sub-windows are then searched using a common prioritization criteria. More specific implementations of this approach permit each search of this type to take a fixed amount of time, thereby making scheduling calculations easy to implement. Moreover, such implementations provide for all pilots to be searched equally often irrespective of window sizes, and for less likely candidates for idle handoff (pilots with longer window sizes) not to be given precedence over more likely idle handoff candidates. Also, as search results are accumulated, the amount of unsearched PN space within a window decreases, thereby decreasing the probability of finding a strong pilot and increasing the ability for more intelligent scheduling.

Abstract translation: 本发明的示例应用涉及在基于CDMA的无线电话通信系统中搜索导频信号的移动接收机。 接收机通过首先将具有大于阈值数目的搜索窗口长度的那些导频信号抽取到多个子窗口中来处理接收到的导频信号。 然后使用公共优先级标准来搜索其他导频信号和子窗口。 这种方法的更具体实现允许这种类型的每个搜索采取固定的时间量，从而使调度计算容易实现。 此外，这样的实现提供了所有导频被均等地搜索，而不考虑窗口大小，并且对于不太可能的空闲切换候选（具有较长窗口大小的导频）不被优先于更可能的空闲切换候选。 此外，随着搜索结果的积累，窗口内未密码的PN空间量减少，从而降低找到强导频的可能性，增加智能调度能力。

公开(公告)号：WO02041513A2

公开(公告)日：2002-05-23

申请号：PCT/EP2001/013311

申请日：2001-11-14

IPC: H04B1/7075 ,  H04Q7/38 ,  H04B1/707

CPC classification number: H04B1/70754 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: An example application of the invention is directed to a mobile receiver searching pilot signals in a CDMA-based radiotelephone communications system. The receiver processes received pilot signals by first decimating those pilot signals that have a search window length that is greater than a threshold number of chips, into a plurality of sub-windows. The other pilot signals and the sub-windows are then searched using a common prioritization criteria. More specific implementations of this approach permit each search of this type to take a fixed amount of time, thereby making scheduling calculations easy to implement. Moreover, such implementations provide for all pilots to be searched equally often irrespective of window sizes, and for less likely candidates for idle handoff (pilots with longer window sizes) not to be given precedence over more likely idle handoff candidates. Also, as search results are accumulated, the amount of unsearched PN space within a window decreases, thereby decreasing the probability of finding a strong pilot and increasing the ability for more intelligent scheduling.

Abstract translation: 本发明的示例应用涉及在基于CDMA的无线电话通信系统中搜索导频信号的移动接收机。 接收机通过首先将具有大于阈值数目的搜索窗口长度的那些导频信号抽取到多个子窗口中来处理接收到的导频信号。 然后使用公共优先级标准来搜索其他导频信号和子窗口。 这种方法的更具体实现允许这种类型的每个搜索采取固定的时间量，从而使调度计算容易实现。 此外，这样的实现提供了所有导频被均等地搜索，而不考虑窗口大小，并且对于不太可能的空闲切换候选（具有较长窗口大小的导频）不被优先于更可能的空闲切换候选。 此外，随着搜索结果的积累，窗口内未密码的PN空间量减少，从而降低找到强导频的可能性，增加智能调度能力。