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61. 发明申请

US20050105647A1 Channel estimation by adaptive interpolation 有权
标题翻译：通过自适应插值的信道估计
公开(公告)号：US20050105647A1
公开(公告)日：2005-05-19
申请号：US10920928
申请日：2004-08-18
申请人： Leif Wilhelmsson , Bo Bernhardsson , Lennart Andersson
发明人： Leif Wilhelmsson , Bo Bernhardsson , Lennart Andersson
IPC分类号： H04L25/02 , H04L27/26 , H03K9/00
CPC分类号： H04L25/0234 , H04L5/0048 , H04L25/022 , H04L25/0222 , H04L27/2647
摘要： Methods and apparatus that achieve good channel estimation without using unnecessarily complex interpolation filters are described. Adaptive interpolation filtering of a signal in a receiver includes determining at least one correlation function parameter of the channel and determining a filter configuration based on the correlation function parameter. Interpolation filtering is then performed on the signal using the determined filter configuration. The interpolation may be performed in time, where a Doppler frequency shift can serve as the correlation function parameter, or in frequency, where a root mean square or maximum delay spread can serve as the correlation function parameter, or both. A worst case signal-to-noise ratio may be used in determining the filter configuration, or, optionally, the signal-to-noise ratio can determined in real time. The filter configuration can be determined in real time or selected from one of a plurality of predetermined configurations having different complexities.
摘要翻译：描述了不使用不必要的内插滤波器实现良好信道估计的方法和装置。接收机中的信号的自适应插值滤波包括确定信道的至少一个相关函数参数，并且基于相关函数参数来确定滤波器配置。然后使用确定的滤波器配置对信号执行插值滤波。可以在时间上执行插值，其中多普勒频移可以用作相关函数参数，或频率，其中均方根或最大延迟扩展可以用作相关函数参数，或两者。可以使用最坏情况的信噪比来确定滤波器配置，或者可选地，可以实时地确定信噪比。滤波器配置可以实时确定或者从具有不同复杂度的多个预定配置之一中选择。

62. 发明授权

US10797820B2 Method and a first radio communication node for scheduling a data transmission 有权
公开(公告)号：US10797820B2
公开(公告)日：2020-10-06
申请号：US14116955
申请日：2012-05-14
申请人： Bengt Lindoff , Christian Bergljung , Leif Wilhelmsson
发明人： Bengt Lindoff , Christian Bergljung , Leif Wilhelmsson
IPC分类号： H04L1/00 , H04L1/18 , H04J11/00 , H04W72/12 , H04W24/10
摘要： A method in a first radio communication node (110, 310, 710, 1010) and a first radio communication node (110, 310, 710, 1010) for scheduling a data transmission in a first time frame using one of a plurality of modulation and coding schemes are provided. The data transmission is to be transmitted between the first radio communication node (110, 310, 710, 1010) and a second radio communication node (120, 320, 720, 1020). The first radio communication node (110, 310, 710, 1010) obtains (301, 701, 1001, 1401) a first indication about channel quality for the first time frame. The first radio communication node (110, 310, 710, 1010) obtains (302, 702, 1002, 1402) second indication about a possible upcoming transmission failure. The possible upcoming transmission failure relates to a feedback information to be transmitted in a second time frame. The feedback information is associated with the data transmission in the first time frame. The first radio communication node (110, 310, 710, 1010) selects (303, 703, 1003, 1403) a modulation and coding scheme out of said plurality of modulation and coding schemes based on the first indication and the second indication. Next, the first radio communication node (110, 310, 710, 1010) schedules (304, 704, 1004, 1404) the data transmission using the selected modulation and coding scheme.

63. 发明授权

US10045357B2 Interference management for network assisted device-to-device communication 有权
公开(公告)号：US10045357B2
公开(公告)日：2018-08-07
申请号：US14400681
申请日：2012-06-13
申请人： Leif Wilhelmsson , Gabor Fodor , Bengt Lindoff
发明人： Leif Wilhelmsson , Gabor Fodor , Bengt Lindoff
IPC分类号： H04W72/00 , H04W72/08 , H04W24/02 , H04W72/04 , H04W76/14
CPC分类号： H04W72/082 , H04W24/02 , H04W72/0406 , H04W76/14
摘要： A method of a first wireless communication device adapted to perform device-to-device communication with a third device is disclosed, wherein a second device causes interference to the device-to-device communication. The method comprises determining an interference criterion associated with the second wireless communication device, and transmitting an interference management request message related to the interference criterion to a network node. A corresponding method of a network node adapted to provide assistance of device-to-device communication is also disclosed. The method comprises receiving the interference management request message related to the interference criterion from the first wireless communication device, and transmitting an interference control message to at least one of the first wireless communication device, the second wireless communication device, and the third wireless communication device. Corresponding computer program product, arrangements, wireless communication device and network node are also disclosed.

64. 发明授权

US09100073B2 Wireless communications system and method 有权
标题翻译：无线通信系统及方法
公开(公告)号：US09100073B2
公开(公告)日：2015-08-04
申请号：US13881402
申请日：2011-10-21
申请人： Bengt Lindoff , Leif Wilhelmsson , Thomas Olsson
发明人： Bengt Lindoff , Leif Wilhelmsson , Thomas Olsson
IPC分类号： H04B7/02 , H04B7/06 , H04B7/04 , H04B7/08
CPC分类号： H04B7/0608 , H04B7/0417 , H04B7/0691 , H04B7/0874
摘要： Disclosed herein is a method of communicating a digital signal via a wireless communications channel between a transmitter and a receiver, at least one of the transmitter and the receiver comprising a plurality of transducers for transforming a signal between an electrical signal and a wireless signal. Embodiments of the method comprises determining (S302; S602) a property of the communications channel; based on at least the determined property, selecting (S303, S305) a number of transducers from the plurality of transducers; and communicating (S304) a digital signal from the transmitter to the receiver using the selected number of transducers.
摘要翻译：本文公开了一种通过发射机和接收机之间的无线通信信道传送数字信号的方法，所述发射机和接收机中的至少一个包括用于在电信号和无线信号之间变换信号的多个换能器。该方法的实施例包括确定（S302; S602）通信信道的属性; 基于至少所确定的属性，从所述多个换能器中选择（S303，S305）多个换能器; 以及使用所选数量的换能器将数字信号从发射机（S304）传送到接收机。

65. 发明授权

US08768283B2 Complex intermediate frequency mixer stage and calibration thereof 有权
标题翻译：复杂中频混频器及其校准
公开(公告)号：US08768283B2
公开(公告)日：2014-07-01
申请号：US13823785
申请日：2011-09-16
申请人： Fenghao Mu , Lars Sundström , Leif Wilhelmsson
发明人： Fenghao Mu , Lars Sundström , Leif Wilhelmsson
IPC分类号： H04B1/26 , H04B1/10
CPC分类号： H04B1/06 , H03D7/166 , H03D7/18
摘要： The invention relates to a complex intermediate frequency (CIF) mixer stage, methods of operation thereof, and methods of calibration thereof. The CIF mixer stage comprises numerous individual mixers driven by IF clock signals to down-convert received IF signals into a set of signals at baseband frequency which are further combined to form a lower side band signal and an upper side band signal. The IF clock signals used have a predefined phase relationship among them, which involves tuneable phase skews. By calibration of the conversion gains and the phases of the IF clock signals the gain and phase imbalance introduced in a preceding radio frequency mixer stage and/or the CIF mixer stage can be cancelled. Further, in-channel IQ leakage control can be applied to the lower side band signal and/or the upper side band signal. The CIF mixer stage can thus effectively suppress image interference and IQ leakage.
摘要翻译：本发明涉及复杂中频（CIF）混频器级，其操作方法及其校准方法。 CIF混频器级包括由IF时钟信号驱动的多个单独的混频器，以将接收到的IF信号降频转换成基带频率的一组信号，这些信号进一步组合以形成下边带信号和上边带信号。所使用的IF时钟信号之间具有预定的相位关系，这涉及到可调相位偏移。通过校准转换增益和IF时钟信号的相位，可以取消在前一个射频混频器级和/或CIF混频器级中引入的增益和相位不平衡。此外，信道内IQ泄漏控制可以应用于下边带信号和/或上边带信号。因此，CIF混频器级可以有效地抑制图像干扰和IQ泄漏。

66. 发明授权

US08737533B2 Method and arrangements for estimating IQ-imbalance 有权
标题翻译：估计智商不平衡的方法和安排
公开(公告)号：US08737533B2
公开(公告)日：2014-05-27
申请号：US12937069
申请日：2009-04-08
申请人： Niklas Andgart , Leif Wilhelmsson
发明人： Niklas Andgart , Leif Wilhelmsson
IPC分类号： H03D3/00
CPC分类号： H04L27/3863 , H04L5/0007 , H04L5/0048 , H04L5/0066 , H04L25/0226 , H04L25/0228 , H04L25/0236 , H04L27/2613 , H04L27/2647
摘要： An arrangement for estimating IQ-imbalance of a received OFDM-signal is disclosed. The arrangement comprises an FFT-unit (410) adapted to transform the received OFDM-signal to a frequency domain. The frequency domain comprises a plurality of sub-carrier frequencies, and the transformed received OFDM-signal comprises pilot symbols on one or more sub-carrier frequencies and symbols other than pilot symbols on one or more other sub-carrier frequencies. The arrangement also comprises channel estimation circuitry (430, 445), and an IQ-imbalance estimation unit (440) adapted to estimate the IQ-imbalance based on at least one of the pilot symbols, a determined estimated channel value for the sub-carrier frequency of the at least one pilot symbol, an estimate of the transmitted information symbol on the corresponding mirror sub-carrier frequency associated with the at least one pilot symbol and an estimated channel value for the corresponding mirror sub-carrier frequency associated with the at least one pilot symbol. Wherein the corresponding mirror sub-carrier frequency comprises a symbol other than a pilot symbol. A corresponding method and a computer program product are also disclosed.
摘要翻译：公开了一种用于估计接收的OFDM信号的IQ不平衡的装置。该装置包括适于将所接收的OFDM信号变换为频域的FFT单元（410）。频域包括多个子载波频率，并且经变换的接收OFDM信号包括在一个或多个子载波频率上的导频符号和除一个或多个其它子载波频率上的导频符号之外的符号。该布置还包括信道估计电路（430,445）和适用于基于导频符号中的至少一个估计IQ不平衡的IQ不平衡估计单元（440），用于子载波的确定的估计信道值所述至少一个导频符号的频率，与所述至少一个导频符号相关联的对应的镜像子载波频率上的所发送的信息符号的估计以及与所述至少一个导频符号相关联的对应的镜像子载波频率的估计信道值一个导频符号。其中相应的镜像子载波频率包括除导频符号之外的符号。还公开了相应的方法和计算机程序产品。

67. 发明申请

US20140018027A1 TECHNIQUE FOR AUTOMATIC GAIN CONTROL 有权
标题翻译：自动增益控制技术
公开(公告)号：US20140018027A1
公开(公告)日：2014-01-16
申请号：US14007679
申请日：2012-03-28
申请人： Leif Wilhelmsson , Bengt Lindoff
发明人： Leif Wilhelmsson , Bengt Lindoff
IPC分类号： H04B1/12
CPC分类号： H04B1/123 , H03G3/3052 , H03G3/3078 , H04L27/2647 , H04L27/3809
摘要： A technique for performing Automatic Gain Control for a receiver (102) of a device (100) connected to a communication system is provided. As for a method embodiment, a method (200) comprises the steps of receiving (205) a signal using a gain setting (310; 410; 510; 610) of the receiver (102); at least partially decoding (210) the received signal (301; 401; 501; 601) to obtain a decoding result; and selecting (215) the gain setting based on the decoding result.
摘要翻译：提供了一种用于对连接到通信系统的设备（100）的接收机（102）执行自动增益控制的技术。对于方法实施例，方法（200）包括以下步骤：使用接收器（102）的增益设置（310; 410; 510; 610）接收（205）信号; 至少部分地解码（210）所述接收信号（301; 401; 501; 601）以获得解码结果; 以及基于解码结果选择（215）增益设置。

68. 发明申请

US20130273834A1 SELF-INTERFERENCE SUPPRESSION CONTROL FOR A RELAY NODE 有权
标题翻译：用于继电器节点的自干扰抑制控制
公开(公告)号：US20130273834A1
公开(公告)日：2013-10-17
申请号：US13880533
申请日：2011-09-22
申请人： Lars Sundstrom , Leif Wilhelmsson
发明人： Lars Sundstrom , Leif Wilhelmsson
IPC分类号： H04B7/155 , H04B15/00
CPC分类号： H04B7/15585 , H04B7/155 , H04B15/00
摘要： A technique for self-interference suppression control for a relay node is provided. The relay node comprises a transmitter and a receiver, and is adapted to transmit and received simultaneously using the same frequency channel or using proximate frequency channels. The relay node further comprises an interference signal estimator having a first input adapted to receive a transmitter signal from the transmitter, a second input adapted to receive adaptation metric and an output adapted to output an estimated interference signal generated by the interference signal estimator based on the transmitter signal and the adaptation metric. A subtractor is coupled to the output of interference signal estimator and configured to subtract the estimated interference signal from a received signal in the receiver so as to actively cancel a signal transmitted from the relay node that leaks back into the receiver of the relay node to suppress self-interference.
摘要翻译：提供了一种用于中继节点的自干扰抑制控制的技术。中继节点包括发射机和接收机，并且适于使用相同的频道或使用接近的频率信道同时发射和接收。所述中继节点还包括干扰信号估计器，所述干扰信号估计器具有适于从所述发射机接收发射机信号的第一输入端，适于接收自适应度量的第二输入端和适于输出由干扰信号估计器产生的估计干扰信号的输出，发射机信号和适应度量。减法器耦合到干扰信号估计器的输出，并且被配置为从接收器中的接收信号中减去所估计的干扰信号，从而主动地消除从中继节点发送的信号，该信号泄漏回中继节点的接收机以抑制自我干扰

69. 发明申请

US20130208776A1 Test Signal in Receiver 审中-公开
标题翻译：接收机测试信号
公开(公告)号：US20130208776A1
公开(公告)日：2013-08-15
申请号：US13812619
申请日：2011-07-26
申请人： Jim Svensson , Chester Park , Lars Sundström , Leif Wilhelmsson
发明人： Jim Svensson , Chester Park , Lars Sundström , Leif Wilhelmsson
IPC分类号： H04B17/00
CPC分类号： H04B17/20 , H04B17/0085 , H04L27/2647 , H04L27/364 , H04L27/366
摘要： The invention proposes a way of inserting an analog test signal during normal reception into analog blocks of an OFDM receiver in such a way that the reception is either not corrupted at all, or only very little. This is achieved either by inserting the analog test signal in time or frequency where it does not corrupt the received signal, or by accounting for the interfering analog test signal in the decoding process.
摘要翻译：本发明提出了一种在正常接收期间将模拟测试信号插入到OFDM接收机的模拟块中的方式，使得接收完全没有被破坏，或者只是很少。这可以通过在不损坏接收信号的时间或频率插入模拟测试信号，或通过考虑解码过程中的干扰模拟测试信号来实现。

70. 发明授权

US08472538B2 Method and apparatus for delay spread estimation 有权
标题翻译：用于延迟扩展估计的方法和装置
公开(公告)号：US08472538B2
公开(公告)日：2013-06-25
申请号：US12746604
申请日：2008-12-08
申请人： Leif Wilhelmsson , Bo Bernhardsson , Lars Björkman
发明人： Leif Wilhelmsson , Bo Bernhardsson , Lars Björkman
IPC分类号： H04L27/28
CPC分类号： H04L25/022 , H04L5/0048 , H04L25/0232 , H04L27/2647 , H04L27/2662
摘要： Methods for calculating a delay spread estimate in an OFDM-receiver are described, along with computer program products and electronic apparatuses for performing the methods. The methods comprise determining a position of an FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal and using the determined position to obtain a first OFDM-symbol from the received OFDM-signal. An FFT is applied to the first OFDM-symbol to produce an FFT-output signal. A frequency dependent phase rotation component of the FFT-output signal is determined and removed from the FFT-output signal. A number of zero-crossings of at least one of a real component and an imaginary component of a transfer function of a channel, over which the received OFDM-signal has been transmitted, derived from the FFT-output signal where the frequency dependent phase rotation component has been removed is determined, and a delay spread estimate is calculated based on the determined number of zero-crossings.
摘要翻译：与用于执行方法的计算机程序产品和电子设备一起描述了用于计算OFDM接收机中的延迟扩展估计的方法。所述方法包括相对于所接收的OFDM信号的一个或多个OFDM符号确定FFT窗口的位置，并且使用所确定的位置从接收的OFDM信号中获得第一OFDM符号。对第一OFDM符号应用FFT以产生FFT输出信号。 FFT输出信号的频率相关相位旋转分量被确定并从FFT输出信号中去除。频率依赖相位旋转的FFT输出信号导出传输函数的传输函数的实数分量和虚分量中的至少一个的多个零交叉已经去除了分量，并且基于确定的过零点数来计算延迟扩展估计。

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