公开(公告)号：US07336696B2

公开(公告)日：2008-02-26

申请号：US10734739

申请日：2003-12-12

申请人： David Akopian ,  Seppo Turunen ,  Samuli Pietila ,  Harri Valio

发明人： David Akopian ,  Seppo Turunen ,  Samuli Pietila ,  Harri Valio

IPC分类号： H04B1/69

CPC分类号： H04B1/70775 ,  G01S19/29 ,  G01S19/30 ,  H04B1/70752 ,  H04B2201/70715

摘要： The invention relates to an apparatus supporting an acquisition of a received code modulated signal by determining the correlation between the received code modulated signal and an available replica code sequence at different code phases. It is proposed that the apparatus comprises a first acquisition engine for selecting code phases which are good candidates for being the code phase at which a received code modulated signal and an available replica code sequence have the highest correlation. The apparatus further comprises a second acquisition engine for performing a refined comparison between a received code modulated signal and an available replica code sequence for each code phase selected by the first acquisition engine. The invention relates equally to a corresponding method and to a system comprising such an apparatus and a network.

摘要翻译： 本发明涉及一种支持通过在不同代码阶段确定所接收的码调制信号与可用复制码序列之间的相关性来支持所接收的码调制信号的获取的装置。 提出该装置包括：第一采集引擎，用于选择作为接收码调制信号和可用复制码序列具有最高相关性的码相位的良好候选的码相位。 该装置还包括第二采集引擎，用于对接收到的代码调制信号和由第一采集引擎选择的每个代码阶段的可用复制代码序列进行精细比较。 本发明同样涉及相应的方法和涉及包括这种装置和网络的系统。

公开(公告)号：US20080019427A1

公开(公告)日：2008-01-24

申请号：US11491210

申请日：2006-07-21

申请人： Christopher C. Riddle ,  Tien Chien Chen

发明人： Christopher C. Riddle ,  Tien Chien Chen

IPC分类号： H04B1/00 ,  H04L27/06

CPC分类号： H04B1/7075 ,  H04B1/70775 ,  H04B1/7117 ,  H04B2001/70706 ,  H04L27/0014

摘要： Techniques for detecting acquisition of a false channel in a wireless communication system are described. For false channel detection, a peak corresponding to a signal from a base station is initially detected. Frequency acquisition and time tracking of the peak are then performed. The frequency acquisition attempts to determine and correct downconversion frequency error. The time tracking attempts to follow the peak as it moves due to sample timing error and/or changes in channel conditions. Whether the signal is from a desired frequency channel or a false frequency channel is determined based on the time tracking. If a false channel is acquired, then the sampling timing will be either too slow or too fast, and the peak will move at a fast rate. A false channel may be detected based on the movement of the peak.

摘要翻译： 描述用于检测无线通信系统中的虚信道的获取的技术。 对于伪信道检测，初始检测到对应于来自基站的信号的峰值。 然后进行峰值的频率采集和时间跟踪。 频率采集尝试确定和修正下变频频率误差。 由于采样定时误差和/或信道条件的变化，时间跟踪尝试跟随峰值。 基于时间跟踪确定信号是来自期望的频道还是假频道。 如果获取了虚假通道，则采样时间将太慢或太快，并且峰值将以快速速率移动。 可以基于峰值的移动来检测虚信道。

公开(公告)号：US20070223567A1

公开(公告)日：2007-09-27

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： It is proposed a receiver comprising receiving means for receiving a preamble signal (26) that comprises a long PN sequence (33) being a combination of a plurality of short PN sequences (29, 30, 31,32), wherein said short PN sequences (29, 30, 31,32) are selected on the basis of their auto-correlation and/or cross-correlation properties. At least one of said short PN sequences (29, 30, 31,32) referred to as a coarse timing short PN sequence (PN1) is adapted to perform a coarse timing synchronization, extracting means (41) for extracting said coarse timing short PN sequence (PN1) from said long PN sequence (33), first auto-correlating means (42, 43, 44, 45) for performing a coarse timing synchronization using said coarse timing short PN sequence (PN1), and second auto-correlating means (52, 53, 54, 55) for performing a fine timing synchronization using said long PN sequence (33).

摘要翻译： 提出了一种接收机，包括接收装置，用于接收前导信号（26），其包括作为多个短PN序列（29,30,31,32）的组合的长PN序列（33），其中所述短PN序列 （29,30,31,32）是基于它们的自相关和/或互相关性质来选择的。 被称为粗定时短PN序列（PN 1）的所述短PN序列（29,30,31,32）中的至少一个适于执行粗定时同步，提取装置（41）用于提取所述粗时序短PN序列 来自所述长PN序列（33）的PN序列（PN 1），用于使用所述粗定时短PN序列（PN 1）执行粗定时同步的第一自相关装置（42,43,44,45）和第二自动相关装置 - 相关装置（52,53,54,55），用于使用所述长PN序列（33）执行精细定时同步。

公开(公告)号：US20070183487A1

公开(公告)日：2007-08-09

申请号：US11641118

申请日：2006-12-19

申请人： Angelo Genghi

发明人： Angelo Genghi

IPC分类号： H04B1/00

CPC分类号： H04B1/7077 ,  H04B1/70775 ,  H04B1/708 ,  H04B2201/70707 ,  H04B2201/70715

摘要： Systems, methods and devices for signal processing are presented. In particular, methods for the detection of signals in CDMA-based systems are presented, together with corresponding devices. These methods provide more efficient use of correlation resources through proper identification of candidate signal peaks.

摘要翻译： 提出了用于信号处理的系统，方法和装置。 特别地，提出了用于在基于CDMA的系统中检测信号的方法以及相应的设备。 这些方法通过正确识别候选信号峰提供了相关资源的更有效的使用。

公开(公告)号：US07254163B2

公开(公告)日：2007-08-07

申请号：US10707663

申请日：2003-12-31

申请人： Sheng-Jie Chen ,  Che-Li Lin

发明人： Sheng-Jie Chen ,  Che-Li Lin

IPC分类号： H04B1/00 ,  H04J3/06

CPC分类号： H04B1/70775 ,  H04B1/70735 ,  H04B1/7083 ,  H04B1/709

摘要： A method for performing frame synchronization in a WCDMA system includes first, correlating a received signal with a plurality of predetermined correlators to obtain a plurality of frame synchronization correlation results, then, coherently combining frame synchronization correlation results with a slot synchronization phase when a test phase difference is less than a threshold phase difference, or, coherently combining frame synchronization correlation results with a linear combination of slot synchronization phases when the test phase difference is greater than or equal to the threshold phase difference. The slot synchronization phase is determined by correlating the received signal with a slot synchronization sequence. Lastly, the method determines a frame boundary of the received signal based on the coherent combination results. The method accommodates for a changing signal to noise ratio to improve frame synchronization speed and accuracy.

摘要翻译： 一种用于在WCDMA系统中执行帧同步的方法包括首先将接收信号与多个预定相关器相关联以获得多个帧同步相关结果，然后在测试阶段相干地将帧同步相关结果与时隙同步相结合 差值小于阈值相位差，或者当测试相位差大于或等于阈值相位差时，将帧同步相关结果与时隙同步相位的线性组合相干组合。 通过将接收的信号与时隙同步序列相关联来确定时隙同步相位。 最后，该方法基于相干组合结果确定接收信号的帧边界。 该方法适应变化的信噪比，从而提高帧同步速度和精度。

公开(公告)号：US07248624B2

公开(公告)日：2007-07-24

申请号：US10650866

申请日：2003-08-28

申请人： Kai Tang

发明人： Kai Tang

IPC分类号： H04B1/69 ,  H04L7/00

CPC分类号： H04L7/007 ,  G01S19/24 ,  H04B1/7075 ,  H04B1/70755 ,  H04B1/70775 ,  H04B2201/70715

摘要： Systems and techniques are disclosed relating to communications. The systems and techniques involve the synchronizing to a signal having a plurality of bits by computing energy for a plurality of different phase offset signal portions, generating a ratio from the signal portion with the highest computed energy and the signal portion with the second highest computed energy, and comparing the ratio to a threshold to determine whether the signal portion with the highest computed energy can be used to determine bit timing.

摘要翻译： 公开了与通信相关的系统和技术。 这些系统和技术涉及通过针对多个不同的相位偏移信号部分计算能量来产生与具有最高计算能量的信号部分的比率以及具有第二高计算能量的信号部分的具有多个位的信号的同步 并且将该比率与阈值进行比较，以确定具有最高计算能量的信号部分是否可以用于确定比特定时。

公开(公告)号：US07227886B2

公开(公告)日：2007-06-05

申请号：US10207614

申请日：2002-07-29

申请人： Adam Robert Margetts ,  Louis Robert Litwin, Jr.

发明人： Adam Robert Margetts ,  Louis Robert Litwin, Jr.

IPC分类号： H04B1/00

CPC分类号： H04B1/7093 ,  H04B1/70735 ,  H04B1/7075 ,  H04B1/70755 ,  H04B1/70775

摘要： An apparatus for synchronizing the reception of a spread-spectrum signal includes a synchronization apparatus having a code-matched filter, a running average unit coupled to the filter, a peak detector coupled to the running average unit, and a synchronizer coupled to the peak detector for providing an index of a peak. A corresponding method includes receiving a spread-spectrum signal having a period comprising a plurality of indexable samples, maintaining a mean array comprising a running mean value for each indexable sample over a variable number of periods, detecting a peak value of the array, calculating an average value of the array, computing a peak-to-average ratio in accordance with the detected peak value and the calculated average value, comparing the peak-to-average ratio against a time-varying threshold, and synchronizing the received signal when the peak-to-average ratio exceeds the current value of the threshold.

摘要翻译： 用于同步扩频信号的接收的装置包括具有码匹配滤波器，耦合到滤波器的运行平均单元，耦合到运行平均单元的峰值检测器和耦合到峰值检测器的同步器的同步装置 用于提供峰值的索引。 相应的方法包括接收具有包括多个可索引样本的周期的扩频信号，维持包括可变数个周期的每个可索引样本的运行平均值的平均数组，检测阵列的峰值，计算一个 阵列的平均值，根据检测到的峰值和计算的平均值计算峰均比，将峰均比与时变阈值进行比较，并且当峰的峰值与峰值 平均比超过阈值的当前值。

公开(公告)号：US20060246929A1

公开(公告)日：2006-11-02

申请号：US11458568

申请日：2006-07-19

申请人： Shiquan Wu ,  Rene Lamontagne

发明人： Shiquan Wu ,  Rene Lamontagne

IPC分类号： H04B7/00 ,  H04B15/00

CPC分类号： H04B1/7087 ,  H04B1/70754 ,  H04B1/7077 ,  H04B1/70775 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2655

摘要： A method of a receiver determining the timing of a signal transmitted in a time-slotted manner, the signal comprising a sequence of information which is repeated at a known interval and has at least a known minimum length. The method performs correlation operations between groups of received slots of information, the groups spaced by the known interval. The groups are moved through the received signal, adding and removing slots, to locate a maximum correlation value sum for the group which should correspond to the timing of the slot. The method also can be used to determine a frequency offset at the receiver and/or an initial phase.

摘要翻译： 一种接收机确定以时隙方式发送的信号的定时的方法，所述信号包括以已知间隔重复且具有至少已知最小长度的信息序列。 该方法在接收到的信息时隙的组之间执行相关操作，所述组间隔了已知间隔。 通过接收的信号移动组，添加和移除时隙，以便为应该对应于时隙的定时的组定位最大相关值和。 该方法还可以用于确定接收机处的频率偏移和/或初始相位。

公开(公告)号：US06990140B2

公开(公告)日：2006-01-24

申请号：US09860125

申请日：2001-05-17

申请人： Peter Van Wyck Loomis ,  Yiming Yu

发明人： Peter Van Wyck Loomis ,  Yiming Yu

IPC分类号： H04B1/69 ,  H04B1/707

CPC分类号： H04B1/70775 ,  G01S19/24 ,  G01S19/30 ,  H04B2201/70715

摘要： A GPS receiver and method using alternating “A” and “B” integration time segments. The polarities of certain GPS data bits are known beforehand and their expected reception times are known. The GPS signal in 10 millisecond “A” time segments and “B” time segments is depolarized according to the known polarities. The depolarized GPS signal during an “A” time period made up of all the “A” time segments is integrated for providing an “A” time period magnitude for each code phase. Likewise, the depolarized GPS signal during a “B” time period made up of all the “B” time segments is integrated for providing a “B” time period magnitude for each potential GPS code phase. The strongest of the time period magnitudes is compared to a correlation threshold for selecting a code phase for signal acquisition.

公开(公告)号：US20050147157A1

公开(公告)日：2005-07-07

申请号：US10707663

申请日：2003-12-31

申请人： Sheng-Jie Chen ,  Che-Li Lin

发明人： Sheng-Jie Chen ,  Che-Li Lin

IPC分类号： H04B1/707 ,  H04B1/69

CPC分类号： H04B1/70775 ,  H04B1/70735 ,  H04B1/7083 ,  H04B1/709

摘要： A method for performing frame synchronization in a WCDMA system includes first, correlating a received signal with a plurality of predetermined correlators to obtain a plurality of frame synchronization correlation results, then, coherently combining frame synchronization correlation results with a slot synchronization phase when a test phase difference is less than a threshold phase difference, or, coherently combining frame synchronization correlation results with a linear combination of slot synchronization phases when the test phase difference is greater than or equal to the threshold phase difference. The slot synchronization phase is determined by correlating the received signal with a slot synchronization sequence. Lastly, the method determines a frame boundary of the received signal based on the coherent combination results. The method accommodates for a changing signal to noise ratio to improve frame synchronization speed and accuracy.

摘要翻译： 一种用于在WCDMA系统中执行帧同步的方法包括首先将接收信号与多个预定相关器相关联以获得多个帧同步相关结果，然后在测试阶段相干地将帧同步相关结果与时隙同步相结合 差值小于阈值相位差，或者当测试相位差大于或等于阈值相位差时，将帧同步相关结果与时隙同步相位的线性组合相干组合。 通过将接收的信号与时隙同步序列相关联来确定时隙同步相位。 最后，该方法基于相干组合结果确定接收信号的帧边界。 该方法适应变化的信噪比，从而提高帧同步速度和精度。