公开(公告)号：US20140198829A1

公开(公告)日：2014-07-17

申请号：US14238896

申请日：2011-08-17

申请人： Henrik Egnell ,  Nina Blom

发明人： Henrik Egnell ,  Nina Blom

IPC分类号： H04B1/7117 ,  H04B1/709

CPC分类号： H04B1/7117 ,  H04B1/709 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/709727

摘要： The invention relates to the field of radio signal receivers for use in wireless communication networks. In particular to a receiver unit having at least one antenna input for receiving multipath radio signals via a radio unit and at least one antenna from one or more user equipments is provided. The receiver unit comprises: a despreading unit configured to despread a multipath radio signal in the received multipath radio signals using a number of despreading fingers corresponding to a number of delay positions in the multipath radio signal which corresponds to a number of paths in the multipath radio signal, and a combining unit configured to apply at least one weight to the output of each of the number of allocated despreading fingers and combine the weighted outputs into a resulting equalized radio signal. The receiver unit is characterised in that it is configured to calculate auto-correlation values based on all multipath radio signals received at the at least one antenna input, determine at least one auto-correlation value based on the calculated auto-correlation values, determine at least one time value based on the at least one determined auto-correlation value, and allocate at least one interference suppression finger to a delay position in the multipath radio signal based on the at least one determined time value. The invention further relates to a receiver, a network node and a method for suppressing interference in a received multipath radio signal in a receiver unit.

摘要翻译： 本发明涉及用于无线通信网络的无线电信号接收机领域。 特别涉及一种具有至少一个天线输入的接收机单元，用于经由无线电单元接收多径无线电信号，并提供来自一个或多个用户设备的至少一个天线。 接收机单元包括：解扩单元，被配置为使用与多径无线电信号中的多个延迟位置相对应的多个解扩手指来解扩所接收的多路径无线电信号中的多路径无线电信号，该多路径无线电信号对应于多路径无线电 信号和组合单元，其被配置为将至少一个权重应用于所分配的解扩手指数中的每一个的输出，并将加权输出组合成所得到的均衡无线电信号。 接收机单元的特征在于，其被配置为基于在至少一个天线输入处接收的所有多径无线电信号来计算自相关值，基于所计算的自相关值确定至少一个自相关值， 基于所述至少一个确定的自相关值的至少一个时间值，并且基于所述至少一个确定的时间值，将至少一个干扰抑制手指分配给所述多径无线电信号中的延迟位置。 本发明还涉及一种接收机，网络节点和一种用于抑制接收机单元中接收到的多路径无线电信号中的干扰的方法。

公开(公告)号：US06980585B2

公开(公告)日：2005-12-27

申请号：US10102814

申请日：2002-03-22

申请人： Yoshikazu Yamada ,  Shoji Taniguchi ,  Koichi Kuroiwa ,  Masami Kanasugi

发明人： Yoshikazu Yamada ,  Shoji Taniguchi ,  Koichi Kuroiwa ,  Masami Kanasugi

IPC分类号： H04B1/707 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7117 ,  H04L1/69

CPC分类号： H04B1/7113 ,  H04B2201/7071

摘要： A receiving unit, receiving method, and semiconductor device that reduce the size of circuits in a receiving unit. A receiving section receives signals sent from a base station and transmitted through a plurality of paths. A path tracking section detects timing of each of the plurality of paths through which the signals received by the receiving section were transmitted. A demodulating section demodulates the received signals by performing a despreading process according to the timing of the plurality of paths detected by the path tracking section. A correlation value calculating section calculates a correlation value between the received signals and a spreading code. A destination selecting section provides output from the correlation value calculating section to the path tracking section in the case of performing a path tracking process by the path tracking section and provides output from the correlation value calculating section to the demodulating section in the case of demodulating the received signals by the demodulating section.

摘要翻译： 一种减小接收单元中的电路尺寸的接收单元，接收方法和半导体器件。 接收部分接收从基站发送并通过多个路径发送的信号。 路径跟踪部分检测发送由接收部分接收的信号的多个路径中的每一个的定时。 解调部通过根据由路径追踪部检测出的多个路径的定时进行解扩处理来解调接收信号。 相关值计算部分计算接收信号和扩展码之间的相关值。 目的地选择部分在路径跟踪部分执行路径跟踪处理的情况下，将相关值计算部分的输出提供给路径跟踪部分，并且在解调该解调部分的情况下将相关值计算部分的输出提供给解调部分 由解调部分接收信号。

公开(公告)号：US06922434B2

公开(公告)日：2005-07-26

申请号：US09845950

申请日：2001-04-30

申请人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Kenzo Urabe

发明人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Kenzo Urabe

IPC分类号： H04B1/7117 ,  H04B1/712 ,  H04B1/69

CPC分类号： H04B1/712 ,  H04B1/7117 ,  H04B2201/709727

摘要： Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.

摘要翻译： 提供了恢复在通信介质中根据扩展序列发送的扩频信号中编码的信息的方法，其中从通信介质接收扩频信号并与扩展序列相关联以产生多个时间偏移相关。 这些时间偏移相关中的一些可被设计为消除已知的干扰信号。 然后可以选择多个时间偏移的子集，然后可以使用加权组合来组合对应的业务相关性，以估计在所发送的扩展频谱信号中编码的信息。 还提供了实现这些方法的接收器。

公开(公告)号：US20050032477A1

公开(公告)日：2005-02-10

申请号：US10932511

申请日：2004-09-01

申请人： Ivan Fernandez-Corbaton ,  Roland Rick ,  Messay Amerga

发明人： Ivan Fernandez-Corbaton ,  Roland Rick ,  Messay Amerga

IPC分类号： G01S1/00 ,  G01S1/02 ,  G01S5/02 ,  G01S5/10 ,  G01S19/22 ,  G01S19/40 ,  G01S19/42 ,  G01S19/48 ,  H04B1/10 ,  H04B1/711 ,  H04B1/7117 ,  H04W24/00 ,  H04W28/04 ,  H04W84/06 ,  H04B15/00

CPC分类号： G01S19/22 ,  G01S5/0215 ,  G01S5/0273 ,  G01S5/10 ,  G01S19/40 ,  G01S19/42 ,  G01S19/428 ,  G01S19/46 ,  H04B1/1081 ,  H04B1/711 ,  H04B1/7117 ,  H04W24/00 ,  H04W84/06

摘要： A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses are generated in response to the detection of multiple transmissions of the reference code from multiple transmitters. However, multipath effects distort the generated correlation pulses leading to errors in the time of arrival measurements. The present invention calculates the width of the correlation pulses and determines a delay correction factor based on the pulse width. The delay correction factor is added to the measured delay time to provide a more accurate delay time, thus permitting more accurate location measurements based on time of arrival. In alternative embodiments, other signal factors may also be used to apply delay correction factors. The actual location determination may be performed by the mobile unit, or any other positioning determining entity (PDE). The system is also capable of applying correction factors to time of arrival signals received from global positioning system (GPS) satellites.

摘要翻译： 公开了一种可以减少到达时间错误的影响的系统和方法。 在诸如CDMA设备的移动单元中，当发送的码与存储的参考码匹配时，产生相关脉冲。 在没有多路径效应的情况下，响应于来自多个发射机的参考码的多次传输的检测而产生相关脉冲。 然而，多路径效应使所产生的相关脉冲失真导致到达时间测量的误差。 本发明计算相关脉冲的宽度，并且基于脉冲宽度确定延迟校正因子。 将延迟校正因子加到测量的延迟时间上，以提供更精确的延迟时间，从而根据到达时间进行更准确的位置测量。 在替代实施例中，也可以使用其他信号因子来应用延迟校正因子。 实际位置确定可以由移动单元或任何其他定位确定实体（PDE）执行。 该系统还能够对从全球定位系统（GPS）卫星接收的到达时间信号应用校正因子。

公开(公告)号：US6130923A

公开(公告)日：2000-10-10

申请号：US209356

申请日：1998-12-11

申请人： Jeffrey A. Levin ,  Christopher C. Riddle ,  Tom B. Sherman

发明人： Jeffrey A. Levin ,  Christopher C. Riddle ,  Tom B. Sherman

IPC分类号： H04B1/7115 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/02

CPC分类号： H04B1/7115 ,  H04B1/7117 ,  H04B1/712

摘要： A wireless receiver receiving multipath Wash-code symbols determines which of fingers 402, 410 have locked on a signal. Measurements of the correlation energies between the received signal and all possible symbols are stored in energy storage units 404, 412. The actual signals are combined in combiner 408. A maximum determiner 416 determines the most likely combined symbol, and an index for this symbol is fed back to the energy storage units. Lock detectors 406, 414 use the measurement for this fed-back symbol to determine whether the finger has locked onto a path. This determination is used to decide whether the next signal detected by that finger should be applied to the combiner.

摘要翻译： 接收多路径的无线接收器清洗码符号确定指针402,410中的哪一个锁定在信号上。 接收信号与所有可能符号之间的相关能量的测量被存储在能量存储单元404,412中。实际信号在组合器408中组合。最大确定器416确定最可能的组合符号，并且该符号的索引为 反馈给储能装置。 锁定检测器406,414使用该反馈符号的测量来确定手指是否锁定在路径上。 该确定用于确定由该手指检测到的下一个信号是否应该应用于组合器。

公开(公告)号：US6118807A

公开(公告)日：2000-09-12

申请号：US535947

申请日：1995-09-28

申请人： Bruce G. Warren ,  Alan F. Jovanovich ,  Frank J. Pergal

发明人： Bruce G. Warren ,  Alan F. Jovanovich ,  Frank J. Pergal

IPC分类号： H04B1/7073 ,  H04B1/7117 ,  H04N5/225 ,  A61F2/06 ,  H04L27/30

CPC分类号： H04B1/7073 ,  H04B1/7117

摘要： A delay diversity processor for use in receiving direct sequence spread spectrum data utilizes multipath signals to enhance bit synchronization performance by integrating the magnitude of each multipath signal to allow for erratic fluctuations in the multipath signal. As a result, the receiver is less prone to sudden signal strength variation that might trigger erroneous bit resynchronization. The delay diversity processor comprises a first circuit which determines a magnitude value for each of a plurality of correlated signal samples of individual data bits of plural data streams of the received spread spectrum data. A second circuit integrates each of the magnitude values over a period of time corresponding to receipt of a plurality of the individual data bits. The integrated magnitude values provide a measure of confidence of a particular one of the correlated signal samples with respect to remaining ones of the correlated signal samples. The correlated signal sample having the most consistently high measure of confidence is thus most likely to contain reliable and valid data. In an embodiment of the delay diversity processor, the digital delay circuit of the second circuit provides for resetting of the integrated magnitude values within following interruption of receipt of the spread spectrum data. The data values within the digital delay circuit can be reset either to zero, or to a predetermined value. The use of a predetermined value improves the ability of the delay diversity processor to generate valid data following an interruption of the spread spectrum data.

摘要翻译： 用于接收直接序列扩展频谱数据的延迟分集处理器利用多径信号来增强比特同步性能，通过对每个多路径信号的幅度进行积分以允许多径信号中的不稳定波动。 结果，接收机不太容易发生可能触发错误位重新同步的突发信号强度变化。 延迟分集处理器包括第一电路，其确定接收到的扩展频谱数据的多个数据流的各个数据比特的多个相关信号样本中的每一个的幅度值。 第二电路在对应于多个单独数据位的接收的一段时间内对每个幅度值进行积分。 集成的幅度值提供相对于相关信号样本中的特定一个相对于相关信号样本中的剩余信号样本的置信度的量度。 因此，具有最一致的高置信度的相关信号样本最有可能包含可靠且有效的数据。 在延迟分集处理器的实施例中，第二电路的数字延迟电路提供在接收扩展频谱数据的随后中断之前复位积分幅度值。 数字延迟电路内的数据值可以重置为零或预定值。 使用预定值提高延迟分集处理器在扩展频谱数据的中断之后产生有效数据的能力。

公开(公告)号：US6072807A

公开(公告)日：2000-06-06

申请号：US987072

申请日：1997-12-09

申请人： Douglas Streeter Daudelin

发明人： Douglas Streeter Daudelin

IPC分类号： H04B1/7117 ,  H04J15/00 ,  H04J3/22

CPC分类号： H04B1/7117

摘要： A technique for searching for signals to assign to the fingers of a rake receiver is disclosed. In particular, some embodiments of the present invention identify signals with some PN sequence offsets as more likely to have signals appear at them than other offsets, and monitor the more promising offsets more closely than the less promising offsets, thus enabling signals to be more quickly discovered and assigned to a finger. One embodiment of the present invention comprises: assigning a signal to a finger of a rake receiver; de-assigning the signal from the finger; searching for the signal with the finger after the signal has been de-assigned from the finger; and re-assigning the signal to the finger, if a measure of signal quality of the signal crosses a threshold.

摘要翻译： 公开了一种用于搜索分配给瑞克接收机的手指的信号的技术。 特别地，本发明的一些实施例识别具有一些PN序列偏移的信号，因为在其上出现信号比其它偏移更可能出现信号，并且比不太有希望的偏移更密切地监视更有希望的偏移，从而使得信号能够更快 发现并分配到手指。 本发明的一个实施例包括：将信号分配给耙式接收器的手指; 从手指取消信号; 在从手指取消信号后，用手指搜索信号; 并且如果信号的信号质量的测量值越过阈值，则将信号重新分配给手指。

公开(公告)号：US5987016A

公开(公告)日：1999-11-16

申请号：US964124

申请日：1997-11-04

申请人： Rong He

发明人： Rong He

IPC分类号： H04K1/00 ,  H04B1/00 ,  H04B1/707 ,  H04B1/7115 ,  H04B1/7117 ,  H04B7/08 ,  H04B7/26 ,  H04L23/00 ,  H04B15/00

CPC分类号： H04B1/7117 ,  H04B1/7115 ,  H04B2001/70706

摘要： The method for tracking a mobile communication signal, which operates in a code division multiple access wireless communication system including an antenna (401), and a base site receiver (400) having at least two receiver tracking fingers (F1, F2), includes receiving at the antenna (401) a first multipath signal (119) arriving at an on-time pn-offset (706) with an associated advanced pn-offset value (704) and retard pn-offset value (702) and receiving at the antenna (401) a second multipath signal (107) arriving at an on-time pn-offset (712) with an associated advanced pn-offset value (710) and retard pn-offset value (708). The method further includes determining a spacing between the first multipath signal and the second multipath signal, and adjusting the at least two receiver tracking fingers based on the advanced pn-offset value of one of the multipath signals and the retard pn-offset value of the other multipath signal.

摘要翻译： 用于跟踪在包括天线（401）的码分多址无线通信系统和具有至少两个接收机跟踪指（F1，F2）的基站接收机（400）的码分多址无线通信系统中操作的移动通信信号的方法包括接收 在天线（401）处，以相关联的高级pn偏移值（704）到达接通时间pn偏移（706）并延迟pn偏移值（702）并在天线处接收的第一多径信号（119） （401）具有相关联的高级pn偏移值（710）和延迟pn偏移值（708）到达导通时间pn偏移（712）的第二多径信号（107）。 该方法还包括确定第一多路径信号和第二多路径信号之间的间隔，以及基于多径信号中的一者的高级pn偏移值和第二多径信号的延迟pn偏移值来调整至少两个接收器跟踪指 其他多径信号。

公开(公告)号：US5889768A

公开(公告)日：1999-03-30

申请号：US706150

申请日：1996-08-30

申请人： Brian D. Storm ,  David J. Krause

发明人： Brian D. Storm ,  David J. Krause

IPC分类号： H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/216 ,  H04W36/30 ,  H04W36/36 ,  H04W72/08

CPC分类号： H04W36/30 ,  H04B1/70752 ,  H04B1/70755 ,  H04B1/70756 ,  H04B1/70775 ,  H04B1/7117 ,  H04B2201/70701 ,  H04W36/36 ,  H04W72/08

摘要： A wireless communication device 100 acquires a pilot channel before an assigned slot when the wireless communication device is operating in the slotted mode of a CDMA system. The wireless communication device comprises a searcher receiver 107 that determines the short-term average pilot strength of active and neighbor pilot channels. Finger receivers 107 determine the long-term average pilot strength of the active and neighbor pilot channels. A logic and control circuit 113 assigns the finger receivers to the pilot channels according to their short-term average pilot strength, determines if the long-term average pilot strength of a neighbor channel is greater than the active pilot channel's pilot strength, and determines to hand off to the neighbor pilot channel with the greater long-term average pilot strength. Moreover, an early detection correlation length can be dynamically adjusted according to the pilot strength of the active pilot channel to shorten the pilot acquisition process.

摘要翻译： 无线通信设备100在无线通信设备以CDMA系统的时隙模式操作时，在分配的时隙之前获取导频信道。 无线通信设备包括确定主动和相邻导频信道的短期平均导频强度的搜索器接收机107。 手指接收机107确定主动和相邻导频信道的长期平均导频强度。 逻辑和控制电路113根据其短期平均导频强度将导频信道分配给导频信道，确定相邻信道的长期平均导频强度是否大于有效导频信道的导频强度，并且确定为 移交给邻近的导频信道，具有较长的平均飞行员强度。 此外，可以根据主动导频信道的导频强度动态地调整早期检测相关长度，以缩短导频获取过程。

公开(公告)号：US5691974A

公开(公告)日：1997-11-25

申请号：US368570

申请日：1995-01-04

申请人： Ephraim Zehavi ,  Stephen S. Carter ,  Klein S. Gilhousen

发明人： Ephraim Zehavi ,  Stephen S. Carter ,  Klein S. Gilhousen

IPC分类号： H04B1/04 ,  H04B1/7075 ,  H04B1/7085 ,  H04B1/7087 ,  H04B1/7117 ,  H04B7/216 ,  H04J13/02

CPC分类号： H04B1/7085 ,  H04B1/7087 ,  H04B7/216 ,  H04B1/70753 ,  H04B1/7117

摘要： Method and apparatus for tracking the frequency and phase of signals in spread spectrum communication systems that makes more efficient use of available carrier frequency and phase information by utilizing a substantial portion or all of the energy occupying the frequency spectrum of a received carrier signal, including energy from communication signals intended for other system users. Multiple spread spectrum communication signals are input in parallel to data receivers where they are despread using preselected despreading codes at an adjustable phase angle and decoded over multiple orthogonal codes active within the communication system. Multiple decoded signals are then combined to form a single phase detection signal which is used by at least one tracking loop to track frequency and phase of the carrier signal for the received communication signals. The tracking loop generates a timing signal which is used to adjust the phase angle used during despreading. In further embodiments, the communication signals are despread using appropriate PN codes and separated into in-phase (I) and quadrature channels (Q) where data symbols are processed by fast Hadamard transformers to generate corresponding data bits. The data is formed into pairwise products between the channels and summed over multiple or all active subscriber orthogonal codes. This sum indicates a degree to which the estimated phase differs from the actual phase of received communication signals and is used to adjust the phase of application for the PN codes.

摘要翻译： 用于跟踪扩频通信系统中的信号的频率和相位的方法和装置，其通过利用占据所接收的载波信号的频谱（包括能量）的大部分或全部能量来更有效地利用可用的载波频率和相位信息 来自其他系统用户的通信信号。 多个扩展频谱通信信号并行地输入到数据接收机，在那里它们以可调相位角的预选去扩展码进行解扩，并且在通信系统内有效的多个正交码进行解码。 然后将多个解码信号组合以形成单相检测信号，该相位检测信号由至少一个跟踪环路用于跟踪所接收的通信信号的载波信号的频率和相位。 跟踪环路产生一个定时信号，用于调整在解扩过程中使用的相位角。 在另外的实施例中，使用合适的PN码对通信信号进行解扩，并将其分离成同相（I）和正交信道（Q），其中数据符号被快速哈达马德变换器处理以产生相应的数据位。 数据被形成为信道之间的成对产物，并且在多个或所有有效用户正交码上求和。 该和表示估计相位与接收到的通信信号的实际相位不同的程度，并且用于调整PN码的应用阶段。