公开(公告)号：WO2012135357A1

公开(公告)日：2012-10-04

申请号：PCT/US2012/030967

申请日：2012-03-28

Applicant: QUALCOMM INCORPORATED ,  ZHANG, Wei ,  SAMBHWANI, Sharad Deepak

Inventor： ZHANG, Wei ,  SAMBHWANI, Sharad Deepak

IPC: H04B1/7113 ,  H04B1/7107

CPC classification number: H04B1/7107 ,  H04B1/7113 ,  H04B1/7117

Abstract: Aspects of an apparatus and method of wireless communication include detecting, by a base node, at least one path of a transmission corresponding to received samples from a user equipment. Further, the aspects include assigning a bank of correlators around the detected at least one path, and estimating a composite channel impulse response at an output of each correlator of the bank of correlators. Further, the aspects include refining noisy channel estimates, and reconstructing a received signal from the user equipment based on the refined noisy channel estimate of the composite channel impulse response. Additionally, the aspects include canceling the reconstructed received signal from the received samples

Abstract translation: 无线通信的装置和方法的方面包括：由基站节点检测与来自用户设备的接收到的采样相对应的传输的至少一个路径。 此外，这些方面包括在检测到的至少一条路径周围分配一组相关器，以及在相关器组的每个相关器的输出处估计复合信道脉冲响应。 此外，这些方面包括基于复合信道脉冲响应的精细噪声信道估计来改进噪声信道估计，以及重建来自用户设备的接收信号。 另外，这些方面包括从接收到的采样中取消重建的接收信号

公开(公告)号：WO03013178A8

公开(公告)日：2003-08-14

申请号：PCT/US0223917

申请日：2002-07-25

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN ,  LEVANON NADAV

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04Q7/38 ,  G01S5/00 ,  H04B1/707

CPC classification number: H04B1/7115 ,  H04B1/7113 ,  H04B1/7117

Abstract: A system and method for estimating the earliest signal arrival in a wireless communication system, is presented herein. In accordance with an embodiment of the invention, the system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals corresponding to one of the transmitted pilot signals. The mobile station includes a receiver containing a searcher correlating mechanism and at least one finger correlating mechanism. The mobile station receiver detects the arrival times and energy levels of the received signals and constructs a searcher histogram and a finger histogram representing an arrival time distribution of samples corresponding to the received signals. The mobile station then generates a delay index for each of the estimated early signal arrivals and forwards the delay indices to the base station or a position determination entity to select the minimum delay index corresponding to the earliest signal arrival.

Abstract translation: 本文给出了一种估计无线通信系统中最早信号到达的系统和方法。 根据本发明的实施例，该系统包括发送多个导频信号的基站和被配置为接收与所发送的导频信号之一相对应的多个信号的移动台。 该移动站包括一个包含搜索器相关机制和至少一个手指相关机制的接收机。 移动站接收机检测接收到的信号的到达时间和能量水平，并且构建搜索器直方图和表示对应于接收到的信号的采样的到达时间分布的手指直方图。 移动台然后为每个估计的早期信号到达产生延迟指数，并将延迟指数转发给基站或位置确定实体，以选择对应于最早信号到达的最小延迟指数。

公开(公告)号：WO0021201A3

公开(公告)日：2000-08-31

申请号：PCT/US9922437

申请日：1999-09-28

Applicant: ERICSSON INC

Inventor： SOUROUR ESSAM ,  BOTTOMLEY GREGORY E ,  RAMESH RAJARAM

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/707 ,  H04L25/02

CPC classification number: H04B1/7117 ,  H04B1/7113 ,  H04B1/7115

Abstract: A direct sequence spread spectrum receiver for operating in a multipath fading channel comprises a rake receiver having plural rake fingers. Each rake finger demodulates a received signal from one of plural channel paths. The output of the plural rake fingers are combined. Each rake finger utilizes a select assigned delay to synchronize to a delay of the one channel path. A searcher periodically performs a channel search on the received signal to detect new delays of strongest paths in the channel. Plural trackers, one for each channel path, adjust the select assigned delays between searches performed by the searcher. A delay controller is operatively coupled to the searcher and the tracker. The delay controller compares new delays of the strongest paths from the searcher to the select assigned delays and reassigns one of the select assigned delays with one of the new delays only if the new delay differs from the one select assigned delay more than a preselect minimum amount.

Abstract translation: 用于在多径衰落信道中操作的直接序列扩频接收机包括具有多个耙指的耙式接收机。 每个耙指解调来自多个通道路径之一的接收信号。 多个耙指的输出被组合。 每个耙指使用选择分配的延迟来同步到一个通道路径的延迟。 搜索者周期性地对接收到的信号执行频道搜索，以检测频道中最强路径的新延迟。 多个跟踪器（每个通道路径一个）调整由搜索器执行的搜索之间的选择分配的延迟。 延迟控制器可操作地耦合到搜索器和跟踪器。 延迟控制器将来自搜索器的最强路径的新延迟与选择分配的延迟进行比较，并且仅当新延迟与选择分配的延迟不同于预选最小量时才将新的延迟中的一个重新分配为新延迟之一 。

公开(公告)号：WO99030433A1

公开(公告)日：1999-06-17

申请号：PCT/US1998/026050

申请日：1998-12-08

IPC: H04B1/711 ,  H04B1/7073 ,  H04B1/7075 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7113 ,  H04B7/26 ,  H04L27/22 ,  H04B1/707

CPC classification number: H04B1/70752 ,  H04B1/70735 ,  H04B1/70753 ,  H04B1/70756 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/7113 ,  H04B2001/70935

Abstract: A system and method for performing the digital receive processing for multiple signals received over the same RF band is described. In a preferred embodiment of the invention, digital RF samples are stored in a queue which is accessed by a searcher (130) and demodulator (112). The searcher (130) and demodulator (112) are preferably located on the same integrated circuit along with the queue. The demodulator (112) demodulates a set of reverse link signals stored within the queue where each reverse link signal is received with at a particular time offset and processed using a particular channel code. The searcher (130) periodically searches for reverse link signals not being processed by the demodulator (112), and for access requests transmitted via the access channel. The searcher (130) preferably searches during the worthy power control groups of each reverse link signal, which corresponds to the two of sixteen power control groups transmitted during an eighth rate frame.

Abstract translation: 描述了用于对通过相同RF频带接收的多个信号执行数字接收处理的系统和方法。 在本发明的优选实施例中，数字RF样本被存储在由搜索器（130）和解调器（112）访问的队列中。 搜索器（130）和解调器（112）优选地与队列一起位于同一集成电路上。 解调器（112）解调存储在队列内的一组反向链路信号，其中每个反向链路信号在特定时间偏移处被接收并且使用特定信道码进行处理。 搜索器（130）周期性地搜索未被解调器（112）处理的反向链路信号，以及用于经由接入信道发送的接入请求。 搜索器（130）优选地在每个反向链路信号的有价值功率控制组期间搜索，其对应于在第八速率帧期间发送的十六个功率控制组中的两个。

公开(公告)号：WO2021011130A1

公开(公告)日：2021-01-21

申请号：PCT/US2020/037160

申请日：2020-06-11

Applicant: CYPRESS SEMICONDUCTOR CORPORATION

Inventor： SMYTH, Aidan ,  ULN, Kiran ,  SIMILEYSKY, Victor ,  MEDAPALLI, Kamesh

IPC: H04B1/7113 ,  H04B7/0456 ,  H04B1/712 ,  H04B7/06 ,  G01S5/02 ,  G06N3/063 ,  G06N3/04 ,  H04L25/02

Abstract: A system includes a transceiver configured to receive frequency dependent channel estimates or beamforming feedback in a multi-carrier, multi-antenna communication system, and a multi-layer perceptron feed forward neural network component, coupled with the transceiver, configured to estimate parameters of multipath reflections using representations of the channel estimates or beamforming feedback, and to generate transmission correction factors for the transceiver.

公开(公告)号：WO2013164324A1

公开(公告)日：2013-11-07

申请号：PCT/EP2013/058943

申请日：2013-04-30

Applicant: NOKIA SIEMENS NETWORKS OY

Inventor： BAIETTO, David ,  FILIPOVICH, Igor ,  NAGARAJ, Shirish ,  VUKOVIC, Ivan

IPC: H04W56/00 ,  H04B1/7075 ,  H04B1/7113

CPC classification number: H04J11/0063 ,  H04W88/085

Abstract: An exemplary embodiment in accordance with this invention provides a method of managing a set of uplink reception paths and controlling the timing of uplink transmission of a UE. The method includes selecting a dominant path from a plurality of paths based at least in part on measurements of the plurality of paths. A path describes a communication route from a mobile device to an access point via a RRH. The method also includes selecting a plurality of non-dominant serving paths from the plurality of paths based at least in part on the measurements; determining a timing window based at least in part on the dominant path; determining a TA for the mobile device based at least in part on the timing window and sending the TA to the mobile device. Apparatus and computer readable media are also described.

Abstract translation: 根据本发明的示例性实施例提供了管理一组上行链路接收路径并控制UE的上行链路传输的定时的方法。 该方法包括至少部分地基于多个路径的测量从多个路径中选择主要路径。 路径描述了经由RRH从移动设备到接入点的通信路由。 该方法还包括至少部分地基于测量从多个路径中选择多个非主要服务路径; 至少部分地基于所述主导路径来确定定时窗口; 至少部分地基于定时窗口确定移动设备的TA，并将TA发送到移动设备。 还描述了装置和计算机可读介质。

公开(公告)号：WO02011304A2

公开(公告)日：2002-02-07

申请号：PCT/US2001/023726

申请日：2001-07-27

IPC: H04B1/7107 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/7183 ,  H04B1/00

CPC classification number: H04B1/7115 ,  H04B1/7107 ,  H04B1/7113 ,  H04B1/7117 ,  H04B1/7183

Abstract: A training method provides and advantageous technique for estimating secondary propagation path parameters based on learming propagation path characteristics for a selected number of secondary propagation path signals. In a multipath environment, a received radio signal comprises multiple received signals, each received through a different signal propagation path. The strongest multipath signal is deemed the main path signal, while the remaining multipath signals are termed secondary path signals. In some types of direct-sequence, spread spectrum communications systems, significant secondary signals must be canceled from the received multipath signal to achieve desired receiver performance, while in other types of systems, such secondary signals may be used to enhance the signal-to-noise ratio of the received signal. In either case, the various multipath signals must be accurately characterized. The training method includes a course search technique that yields initial identification of the significant secondary path signals, and further includes techniques for characterizing the magnitude, phase, and path delay, all relative to the main path signal for secondary path signal of interest. The training method employs differential decoding and sample phase slicing to improve parameter estimation accuracy, and further includes phase correlation operations to determine secondary path delay, where such delays may have spreads that exceed a transmitted signal symbol period.

Abstract translation: 训练方法提供了一种基于用于所选次数传播路径信号的二次传播路径特性来估计二次传播路径参数的有利技术。 在多径环境中，接收的无线电信号包括多个接收信号，每个接收信号通过不同的信号传播路径接收。 最强的多路径信号被认为是主路径信号，而剩余的多路径信号被称为次路径信号。 在一些类型的直接序列扩频通信系统中，必须从接收的多路径信号中消除重要的二次信号以实现期望的接收机性能，而在其它类型的系统中，这样的辅助信号可用于增强信号 - 接收信号的噪声比。 在任一种情况下，必须准确地表征各种多径信号。 训练方法包括产生重要二次路径信号的初始识别的课程搜索技术，并且还包括用于表征幅度，相位和路径延迟的技术，全部相对于感兴趣的辅助路径信号的主路径信号。 训练方法采用差分解码和采样相位切片来提高参数估计精度，并且还包括相位相关运算以确定次级路径延迟，其中这样的延迟可能具有超过发射信号符号周期的扩展。

公开(公告)号：WO01065714A1

公开(公告)日：2001-09-07

申请号：PCT/EP2001/002247

申请日：2001-02-28

IPC: H04B7/26 ,  H04B1/7085 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/707

CPC classification number: H04B1/7085 ,  H04B1/7113 ,  H04B1/7115

Abstract: Locations of path rays in a multi-path channel receiver having multiple time references are detected, e.g., when the receiver switches time references. Locations of received path rays are searched for and determined. The locations are tracked for a predetermined amount of time. If the locations are lost after a predetermined amount of time, a new search for the locations of the received path rays is initiated. The searching may include determining a probable location of a most significant path ray, shifting the location within a predetermined interval, analyzing each shifted location to determine whether the shifted location corresponds to the actual location of the received path ray, and depending on the analysis results, completing the search or determining a probable location of a next most significant ray. The analysis may be performed by correlating each shifted location with a pilot sequence and determining if the location results exceed a predetermined threshold. If the correlation results do not exceed the threshold, a determination is made whether all the most significant path rays have been analyzed, and if so, a complete search for the path ray location is initiated. When switching from a time reference of low accuracy to a time reference of high accuracy, the low accuracy time reference may be calibrated to the high accuracy time reference based on averaged measurements of the ration of clock cycles of the time reference of high accuracy to the clock cycles of the time reference of low accuracy.

Abstract translation: 例如，当接收器切换时间基准时，检测具有多个时间基准的多路径信道接收机中路径光线的位置。 搜索并确定接收路径光线的位置。 这些位置被跟踪预定的时间量。 如果位置在预定时间量之后丢失，则开始对接收到的路径光线的位置的新的搜索。 搜索可以包括确定最重要的路径光线的可能位置，在预定间隔内移动位置，分析每个偏移的位置以确定移位的位置是否对应于接收的路径光线的实际位置，并且根据分析结果 完成搜索或确定下一个最重要射线的可能位置。 可以通过将每个移位的位置与导频序列相关并且确定位置结果是否超过预定阈值来执行分析。 如果相关结果不超过阈值，则确定是否已经分析了所有最重要的路径光线，并且如果是，则启动对路径光线位置的完整搜索。 当从低精度的时间基准切换到高精度的时间基准时，可以基于高精度时间基准的时钟周期的比例的平均测量值将精确度低的时间基准校准为高精度时间基准， 时钟周期的时间参考精度低。

公开(公告)号：WO00065749A1

公开(公告)日：2000-11-02

申请号：PCT/US2000/010855

申请日：2000-04-21

IPC: H04B1/7093 ,  H04B20060101 ,  H04B1/7113 ,  H04B1/7115 ,  H04B7/005 ,  H04B7/216

CPC classification number: H04W52/20 ,  H04B1/7113 ,  H04B2201/70701 ,  H04L25/0224 ,  H04L2027/0046 ,  H04L2027/0065 ,  H04L2027/0093 ,  H04W52/143

Abstract: The punctured pilot channel comprises information symbols of uncertain sign punctured into a sequence of pilot channel symbols of predetermined sign. The apparatus includes an information sign demodulation circuit for determining the sign of the information symbols in response to the pilot channel symbols. A continuous pilot generator (336) generates a non-punctured pilot channel of predetermined sign from the information symbols and the pilot channel symbols. In a first embodiment, the information sign demodulator further comprises a dot product circuit for calculating a dot product of the pilot channel symbols and the punctured information symbols, and a threshold comparator for comparing the dot product to a predetermined threshold.

Abstract translation: 穿孔导频信道包括穿入预定符号的导频信道符号序列的不确定符号的信息符号。 该装置包括用于响应于导频信道符号确定信息符号的符号的信息符号解调电路。 连续导频发生器（336）从信息符号和导频信道符号生成预定符号的未穿孔导频信道。 在第一实施例中，信息符号解调器还包括用于计算导频信道符号和穿孔信息符号的点积的点积电路，以及用于将点乘积与预定阈值进行比较的阈值比较器。

公开(公告)号：WO00022746A1

公开(公告)日：2000-04-20

申请号：PCT/SE1999/001844

申请日：1999-10-12

IPC: H04B1/7085 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/707

CPC classification number: H04B1/7085 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/7117

Abstract: A CDMA receiver includes a plurality of RAKE branches for despreading the received CDMA signals over a corresponding plurality of paths and a single tracking device that is shared among the plurality of the RAKE branches for tracking the delays of the received CDMA signal over a corresponding path. Similarly, a method for tracking a CDMA signal correlates the received signal with local PN code using a plurality of RAKE branches and tracks the received signal using a single tracking device that is shared among the plurality of the RAKE branches.

Abstract translation: CDMA接收机包括多个RAKE分支，用于通过对应的多个路径解扩接收的CDMA信号，以及在多个RAKE分支之间共享的单个跟踪装置，用于跟踪在相应路径上接收的CDMA信号的延迟。 类似地，用于跟踪CDMA信号的方法使用多个RAKE分支将接收信号与本地PN码相关，并且使用在多个RAKE分支之间共享的单个跟踪装置来跟踪接收的信号。