公开(公告)号：US08675788B2

公开(公告)日：2014-03-18

申请号：US13203744

申请日：2010-02-22

申请人： Niklas Andgart ,  Peter Alriksson ,  Joakim Axmon ,  Bengt Lindoff ,  George Jöngren

发明人： Niklas Andgart ,  Peter Alriksson ,  Joakim Axmon ,  Bengt Lindoff ,  George Jöngren

IPC分类号： H04L27/06

CPC分类号： H04L27/2686 ,  H04L27/2657 ,  H04L2027/0065

摘要： A method of estimating frequency offset of a received signal in a terminal apparatus comprises a) determining a phase change between a first and a second reference symbol of the received signal, wherein the time distance t between the first and the second reference symbols is associated with an observation frequency f such that f=1/t. The method further comprises: b) determining a preliminary frequency offset Δf based on the determined phase change, wherein Δf forms a frequency offset hypothesis Δfh; and c) decoding at least a part of the received signal, with application of the frequency offset hypothesis Δfh, to a decoded signal. The method further comprises: d) determining whether the decoded signal is a successful decoding. If the decoded signal is a successful decoding, the frequency offset hypothesis Δfh is determined to be the estimated frequency offset, but if the decoded signal is not a successful decoding, the frequency offset hypothesis Δfh is adjusted by an integer n times the observation frequency f such that Δfh=Δf+n·f, where nε[+/−1, 2, 3, . . . ]. Steps c) and d) are then repeated.

摘要翻译： 一种在终端设备中估计接收信号的频率偏移的方法包括：a）确定接收信号的第一和第二参考符号之间的相位变化，其中第一和第二参考符号之间的时间距离t与 观测频率f使得f = 1 / t。 该方法还包括：b）基于确定的相位变化来确定初始频率偏移量Deltaf，其中Deltaf形成频率偏移假设Deltafh; 以及c）将应用所述频率偏移假设Deltafh的所述接收信号的至少一部分解码为解码信号。 该方法还包括：d）确定解码信号是否是成功解码。 如果解码信号是成功的解码，则将频率偏移假设Deltafh确定为估计的频率偏移，但是如果解码信号不是成功的解码，则频率偏移假设Deltafh被调整为观察频率f的整数n倍 使Deltafh = Deltaf + n·f，其中nepsilon [+/- 1,2,3次。 。 。 ]。 然后重复步骤c）和d）。

公开(公告)号：US20110311005A1

公开(公告)日：2011-12-22

申请号：US13203744

申请日：2010-02-02

申请人： Niklas Andgart ,  Peter Alriksson ,  Joakim Axmon ,  Bengt Lindoff ,  George Jöngren

发明人： Niklas Andgart ,  Peter Alriksson ,  Joakim Axmon ,  Bengt Lindoff ,  George Jöngren

IPC分类号： H04L27/06

CPC分类号： H04L27/2686 ,  H04L27/2657 ,  H04L2027/0065

摘要： There is disclosed a method of estimating frequency offset of a received signal in a terminal apparatus operating in a wireless communication system. The method comprises a) determining a phase change between a first and a second reference symbol of the received signal, wherein the time distance t between the first and the second reference symbols is associated with an observation frequency f such that f=1/t; b) determining a preliminary frequency offset Δf based on the determined phase change, wherein the preliminary frequency offset Δf form a frequency offset hypothesis Δfh; c) decoding at least a part of the received signal, with application of the frequency offset hypothesis Δfh, to a decoded signal; d) determining whether the decoded signal is a successful decoding, wherein if the decoded signal is a successful decoding, determining the frequency offset hypothesis Δfh to be the estimated frequency offset, and if the decoded signal is not a successful decoding, adjusting the frequency offset hypothesis Δfh by an integer n times the observation frequency f such that Δfh=Δf+n·f, where nε[+/−1, 2, 3, . . . ], and repeating steps c) and d). Computer program, frequency controller, and terminal apparatus are also disclosed.

摘要翻译： 公开了一种在无线通信系统中运行的终端装置中估计接收信号的频率偏移的方法。 该方法包括：a）确定接收信号的第一和第二参考符号之间的相位变化，其中第一和第二参考符号之间的时间距离t与观测频率f相关联，使得f = 1 / t; b）基于确定的相位变化来确定初步频率偏移＆Dgr; f，其中初步频率偏移＆Dgr; f形成频率偏移假设＆Dgr; fh; c）对所解码的信号对所述接收信号的至少一部分进行解码，并将所述频率偏移假设＆Dgr; fh应用于解码信号; d）确定解码信号是否是成功解码，其中如果解码信号是成功解码，则确定频偏假设＆Dgr; fh为估计频偏，并且如果解码信号不是成功解码，则调整 频率偏移假设＆Dgr; fh乘以观测频率f的整数n，使得＆Dgr; fh =＆Dgr; f + n·f，其中n＆egr; [+/- 1，2，3，...， 。 。 ]，并重复步骤c）和d）。 还公开了计算机程序，频率控制器和终端装置。

公开(公告)号：US20130077508A1

公开(公告)日：2013-03-28

申请号：US13522807

申请日：2012-05-22

申请人： Joakim Axmon ,  Muhammad Kazmi ,  Bengt Lindoff

发明人： Joakim Axmon ,  Muhammad Kazmi ,  Bengt Lindoff

IPC分类号： H04W24/00

CPC分类号： H04W24/10 ,  H04L27/26 ,  H04W16/14 ,  H04W24/00 ,  H04W36/0094 ,  H04W48/16 ,  H04W72/042 ,  H04W72/0453

摘要： One aspect of the present invention is method for signal quality measurement that provides significant improvements in accuracy, at least in certain scenarios where conventional approaches to such measurements are vulnerable to inaccuracies. Non-limiting example scenarios include instances where a communication network uses downlink carriers in neighboring cells with overlapping frequencies but with different bandwidths and/or center frequencies. In such cases, there may be uneven interference across the carrier bandwidth, e.g., arising from neighboring carriers operating at different center frequencies and/or at different bandwidths. Thus, making the signal quality measurement for a given carrier depend on a combination of measurements taken at different frequency regions of the carrier provides a clearer, more accurate picture of the interference or loading conditions bearing on that carrier.

公开(公告)号：US20120315941A1

公开(公告)日：2012-12-13

申请号：US13580566

申请日：2010-02-24

申请人： Niklas Andgart ,  Bengt Lindoff

发明人： Niklas Andgart ,  Bengt Lindoff

IPC分类号： H04W72/04 ,  H04W52/02

CPC分类号： H04W48/16 ,  H04W76/28

摘要： A mobile station comprises a radio communication unit (22) for communicating with a radio communication network for finding carriers on which transmissions are being made in active transmission intervals of a transmission cycle following a discontinuous transmission scheme. The radio communication unit is configured to select a carrier based on probability settings provided for each carrier of the scheme, scan the selected carrier during a time range that is a fraction of the transmission cycle, confirm the presence of the carrier if transmissions are detected and otherwise to adjust the probability settings of the carriers based on the timing of the scanning and the position of the carrier active transmission interval in the transmission sequence and repeat the selection of carrier based on probability settings and adjusting of probability settings until the presence of a carrier has been confirmed.

摘要翻译： 移动台包括无线电通信单元（22），用于与无线电通信网络进行通信，用于在不连续传输方案之后的发送周期的主动传输间隔中寻找正在进行传输的载波。 无线电通信单元被配置为基于为方案的每个载波提供的概率设置来选择载波，在作为传输周期的一部分的时间范围内扫描所选择的载波，如果检测到传输，则确认载波的存在; 否则将根据扫描的定时和发送序列中的载波活动传输间隔的位置来调整载波的概率设置，并基于概率设置重复载波的选择并调整概率设置，直到存在载波 已经确认。

公开(公告)号：US20120021769A1

公开(公告)日：2012-01-26

申请号：US13260524

申请日：2009-03-27

申请人： Bengt Lindoff ,  Niklas Andgart ,  Ari Kangas ,  Johan Nilsson

发明人： Bengt Lindoff ,  Niklas Andgart ,  Ari Kangas ,  Johan Nilsson

IPC分类号： H04W4/00

CPC分类号： G01S5/0063 ,  G01S5/0236 ,  G01S5/10 ,  H04W64/00

摘要： Methods and arrangements in a first network node, a second radio network node and a mobile terminal for enabling estimation of a position of a mobile terminal are provided. The first network node receives a request for estimating the position of the mobile terminal. The first network node determines a first set of radio network nodes including the second radio network node and two additional radio network nodes. The first network node determines positioning signals for transmission from radio network nodes of the first set to the mobile terminal. The first network node instructs each of the radio network nodes of the first set to transmit the positioning signal, associated therewith, to the mobile terminal.

摘要翻译： 提供了第一网络节点，第二无线电网络节点和用于使得能够估计移动终端的位置的移动终端的方法和布置。 第一网络节点接收用于估计移动终端的位置的请求。 第一网络节点确定包括第二无线电网络节点和两个另外的无线电网络节点的第一组无线电网络节点。 第一网络节点确定用于从第一组的无线电网络节点传送到移动终端的定位信号。 第一网络节点指示第一组的每个无线电网络节点将与其相关联的定位信号发送到移动终端。

公开(公告)号：US08050343B2

公开(公告)日：2011-11-01

申请号：US12324523

申请日：2008-11-26

申请人： Fredrik Nordström ,  Niklas Andgart ,  Bengt Lindoff

发明人： Fredrik Nordström ,  Niklas Andgart ,  Bengt Lindoff

IPC分类号： H04L27/28

CPC分类号： H04L5/0007 ,  H04L5/0042 ,  H04L27/2634 ,  H04L27/2647

摘要： A wireless communication system receiver receives and processes a signal comprising at least two component carriers carrying data scheduled to the receiver and having center frequencies spaced apart by at least one component carrier frequency difference. Each component carrier comprises a number of subcarriers spaced apart by a system subcarrier frequency spacing. A common divisor is obtained for the at least one component carrier frequency difference and the system subcarrier frequency spacing. A symbol is received on the subcarriers of the component carriers and downconverted to baseband to produce a baseband symbol. A block of padding values is inserted in the baseband symbol to produce a padded symbol. The length of the block of padding values is such that intermediate subcarriers are inserted to yield a subcarrier frequency spacing for the padded symbol equal to the common divisor. Finally the padded symbol is Fast Fourier Transform, FFT, processed.

摘要翻译： 无线通信系统接收机接收并处理包括至少两个分量载波的信号，所述至少两个分量载波携带调度到接收机的数据，并具有间隔至少一个分量载波频率差的中心频率。 每个分量载波包括通过系统子载波频率间隔间隔开的多个子载波。 获得至少一个分量载波频率差和系统子载波频率间隔的公约数。 在分量载波的子载波上接收符号并且下变频到基带以产生基带符号。 在基带符号中插入填充值块以产生填充符号。 填充值块的长度使得插入中间子载波以产生等于公约数的填充符号的子载波频率间隔。 最后，填充符号是快速傅里叶变换，FFT处理。

公开(公告)号：US09813202B2

公开(公告)日：2017-11-07

申请号：US14405706

申请日：2012-09-28

申请人： Bengt Lindoff ,  Niklas Andgart ,  Fredrik Nordstrom

发明人： Bengt Lindoff ,  Niklas Andgart ,  Fredrik Nordstrom

IPC分类号： H04B1/04 ,  H04J3/00 ,  H04L5/00 ,  H04B1/7103 ,  H04J11/00

CPC分类号： H04L5/0032 ,  H04B1/7103 ,  H04B2201/70702 ,  H04B2201/70707 ,  H04J11/0056 ,  H04L5/0007

摘要： The present application relates to a method of a wireless device for interference cancellation (IC) in a cellular radio network system comprising a serving network node serving said wireless device. The method comprises using a first IC method for at least partly removing a time aligned symbol of an interfering radio signal from at least a first symbol of a time slot received from the serving network node. The method also comprises using a second IC method, different from the first IC method, for at least partly removing a non-time aligned symbol of an interfering radio signal from at least a second symbol of said time slot received from the serving network node.

公开(公告)号：US08498599B2

公开(公告)日：2013-07-30

申请号：US12143975

申请日：2008-06-23

申请人： Bengt Lindoff ,  Niklas Andgart ,  Muhammad Ali Kazmi ,  Anders Rosenqvist

发明人： Bengt Lindoff ,  Niklas Andgart ,  Muhammad Ali Kazmi ,  Anders Rosenqvist

IPC分类号： H04B17/00

CPC分类号： H04L25/0224 ,  H04B17/327 ,  H04B17/336 ,  H04L5/0007 ,  H04L25/0204

摘要： Methods and apparatus in a receiver for estimating a received power of at least one signal having a pattern known to the receiver, the signal having being transmitted by at least one antenna. A method includes using a first method of measuring the received power based on the pattern, the first method generating a first sequence of first power estimates; determining whether a predetermined first event has occurred; and if the first event has occurred, changing to a second method of measuring the received power, the second method being different from the first method and generating a second sequence of second power estimates.

摘要翻译： 用于估计具有接收机已知的模式的至少一个信号的接收功率的接收机中的方法和装置，该信号由至少一个天线发送。 一种方法包括使用基于所述模式来测量所述接收功率的第一方法，所述第一方法生成第一功率估计的第一序列; 确定是否发生了预定的第一事件; 并且如果发生了第一事件，则改变为测量接收功率的第二方法，所述第二方法与第一方法不同，并产生第二功率估计的第二序列。

公开(公告)号：US20120252446A1

公开(公告)日：2012-10-04

申请号：US13076599

申请日：2011-03-31

申请人： Andres Reial ,  Niklas Andgart ,  Bengt Lindoff ,  Lennart Moren ,  Anders Wallén

发明人： Andres Reial ,  Niklas Andgart ,  Bengt Lindoff ,  Lennart Moren ,  Anders Wallén

IPC分类号： H04W4/00

CPC分类号： H04W48/16 ,  H04W88/06

摘要： Methods and apparatus are provided for detecting the radio access technology (RAT) employed in a received signal prior to performing a cell search. The RAT detection method may be used to identify the most likely RAT employed for each candidate frequency identified in an initial frequency scan. Once the most likely RAT is identified, the mobile communication device can then attempt synchronization according to the procedures for the most likely RAT. Identifying the RAT prior to the cell search reduces the number of synchronization attempts and, consequently, the time needed to perform the cell search.

摘要翻译： 提供了用于在执行小区搜索之前检测在接收信号中采用的无线电接入技术（RAT）的方法和装置。 RAT检测方法可以用于识别在初始频率扫描中识别的每个候选频率所采用的最可能的RAT。 一旦识别出最可能的RAT，则移动通信设备然后可以根据最可能的RAT的过程尝试同步。 在小区搜索之前识别RAT减少了同步尝试的次数，因此减少了进行小区搜索所需的时间。

公开(公告)号：US20120052869A1

公开(公告)日：2012-03-01

申请号：US13319301

申请日：2009-05-08

申请人： Bengt Lindoff ,  Niklas Andgart ,  Ari Kangas ,  Anders Rosenqvist

发明人： Bengt Lindoff ,  Niklas Andgart ,  Ari Kangas ,  Anders Rosenqvist

IPC分类号： H04W72/04

CPC分类号： H04L5/0037 ,  H04J11/0069 ,  H04J13/18

摘要： Allocation of cell IDs in a cellular communication system includes determining a candidate allocation pattern of primary and secondary synchronization signal sequences for a candidate set of two or more cells. A performance metric is applied to the candidate allocation pattern to ascertain a performance indicator for the candidate allocation pattern, wherein the performance indicator indicates a quality of positioning performance for the candidate set of two or more cells. Cell-specific positioning performance for each cell in the candidate set of cells can be considered to derive the performance indicator of the candidate allocation pattern. If the performance indicator indicates acceptable positioning performance, primary and secondary synchronization signal sequences are allocated to respective ones of base stations corresponding to the two or more cells in accordance with the candidate allocation pattern. Otherwise, the process is repeated for a different candidate allocation pattern.

摘要翻译： 蜂窝通信系统中的小区ID的分配包括确定用于两个或更多个小区的候选组的主同步信号序列和辅同步信号序列的候选分配模式。 将性能度量应用于候选分配模式以确定候选分配模式的性能指标，其中性能指标指示两个或多个小区的候选集的定位性能的质量。 可以考虑候选小区集合中的每个小区的小区特定定位性能以导出候选分配模式的性能指标。 如果性能指示符指示可接受的定位性能，则根据候选分配模式将主同步信号序列和次同步信号序列分配给对应于两个或多个小区的基站中的相应基站。 否则，针对不同的候选分配模式重复该过程。