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。

公开(公告)号：US20110004775A1

公开(公告)日：2011-01-06

申请号：US12496879

申请日：2009-07-02

申请人： Jim Svensson ,  Matthias Kamuf

发明人： Jim Svensson ,  Matthias Kamuf

IPC分类号： G06F1/32

CPC分类号： G06F1/3203 ,  G06F1/3296 ,  Y02D10/172

摘要： Systems and methods according to these exemplary embodiments provide for optimizing voltage use in digital circuits. This can be obtained by creating situations for digital circuits such that the effective critical path (ECP) can be used such as, for example, the case where a digital circuit includes a plurality of voltage domains powered by individual and possibly different voltage sources. This can then reduce voltage use in digital circuits.

摘要翻译： 根据这些示例性实施例的系统和方法提供了优化数字电路中的电压使用。 这可以通过创建数字电路的情况来获得，使得可以使用有效关键路径（ECP），例如数字电路包括由单独的和可能不同的电压源供电的多个电压域的情况。 这样可以减少数字电路中的电压使用。

公开(公告)号：US07602852B2

公开(公告)日：2009-10-13

申请号：US11110840

申请日：2005-04-21

申请人： Anders Berkeman ,  Jim Svensson ,  Leif Wilhelmsson

发明人： Anders Berkeman ,  Jim Svensson ,  Leif Wilhelmsson

IPC分类号： H04L27/28

CPC分类号： H04L27/2657 ,  H04L27/2607 ,  H04L27/2662 ,  H04L27/2678

摘要： A coarse estimate of a location of an information carrying part of a symbol in a received signal in a telecommunication system is generated. This involves generating correlation values by correlating the received signal with a delayed received signal. A maximum correlation value of the correlation values is identified, and a duration in time during which the correlation values are greater than or equal to a predetermined percentage of the maximum correlation value is identified, wherein the duration in time begins at a first moment in time and ends at a second moment in time. The coarse estimate of the location of the peak correlation value is set equal to a moment in time between the first moment in time and the second moment in time, for example, a midpoint between the first moment in time and the second moment in time.

摘要翻译： 产生在电信系统中接收信号中承载符号部分的信息的位置的粗略估计。 这涉及通过将接收的信号与延迟的接收信号相关来产生相关值。 识别相关值的最大相关值，并且识别相关值大于或等于最大相关值的预定百分比的时间持续时间，其中时间持续时间从第一时刻开始 并在第二时刻结束。 将峰值相关值的位置的粗略估计设置为等于第一时刻与第二时刻之间的时刻，例如，第一时刻与第二时刻之间的中点。

公开(公告)号：US20060239179A1

公开(公告)日：2006-10-26

申请号：US11110840

申请日：2005-04-21

申请人： Anders Berkeman ,  Jim Svensson ,  Leif Wilhelmsson

发明人： Anders Berkeman ,  Jim Svensson ,  Leif Wilhelmsson

IPC分类号： H04J11/00

CPC分类号： H04L27/2657 ,  H04L27/2607 ,  H04L27/2662 ,  H04L27/2678

摘要： A coarse estimate of a location of an information carrying part of a symbol in a received signal in a telecommunication system is generated. This involves generating correlation values by correlating the received signal with a delayed received signal. A maximum correlation value of the correlation values is identified, and a duration in time during which the correlation values are greater than or equal to a predetermined percentage of the maximum correlation value is identified, wherein the duration in time begins at a first moment in time and ends at a second moment in time. The coarse estimate of the location of the peak correlation value is set equal to a moment in time between the first moment in time and the second moment in time, for example, a midpoint between the first moment in time and the second moment in time.

公开(公告)号：US20150124734A1

公开(公告)日：2015-05-07

申请号：US14406051

申请日：2012-06-21

申请人： Thomas Olsson ,  Peter Brauer ,  Anders Carlsson ,  Roland Carlsson ,  David Engdal ,  Henrik Sahlin ,  Jim Svensson

发明人： Thomas Olsson ,  Peter Brauer ,  Anders Carlsson ,  Roland Carlsson ,  David Engdal ,  Henrik Sahlin ,  Jim Svensson

IPC分类号： H04W74/08 ,  H04W72/04

CPC分类号： H04W74/0833 ,  H04W72/04 ,  H04W74/002

摘要： The present invention relates to method and arrangement in cellular mobile communication systems, in particular for handling of a physical random access channel for example in a Long Term Evolution communication network. By sending to at least one user equipment, UE, in a communication network cell an un-solicited speculative random access response, RAR, message comprising information relating to at least one of pre-amble identifier, allocated UE identifier, and uplink resource allocation data for L2/L3 message, it is possible to reduce the complexity of the access node, e.g. an eNodeB.

摘要翻译： 本发明涉及蜂窝移动通信系统中的方法和装置，特别是用于处理例如长期演进通信网络中的物理随机接入信道。 通过向通信网络小区中的至少一个用户设备UE发送未请求的推测随机接入响应RAR消息，其包括与前同步标识符，分配的UE标识符和上行链路资源分配数据中的至少一个相关的信息 对于L2 / L3消息，可以降低接入节点的复杂度，例如 一个eNodeB。

公开(公告)号：US20110268232A1

公开(公告)日：2011-11-03

申请号：US13098954

申请日：2011-05-02

申请人： Chester Park ,  Lars Sundström ,  Jim Svensson

发明人： Chester Park ,  Lars Sundström ,  Jim Svensson

IPC分类号： H04L27/06

CPC分类号： H04L27/3863 ,  H04B1/28 ,  H04B1/30 ,  H04B17/21 ,  H04L5/001 ,  H04L27/2634 ,  H04L27/2647

摘要： Digital IQ imbalance estimation and compensation is facilitated by shaping the frequency response of receiver branches. In particular, in a multi-carrier receiver, the frequency response of signal processing elements in at least one receiver branch is set to not fully attenuate received signals in a frequency band of interest. The frequency band of interest is greater than the carrier bandwidth of the received signal processed by that receiver branch. In some embodiments, the received signal is not attenuated, and adjacent interfering signals are partially attenuated. This allows information regarding the interfering signals to appear in an IQ imbalance-induced, inter-carrier image of the signals in anther receiver branch, facilitating digital estimation and compensation of IQ imbalance.

摘要翻译： 通过对接收机分支的频率响应进行整形，便于数字IQ不平衡估计和补偿。 特别地，在多载波接收机中，将至少一个接收机支路中的信号处理元件的频率响应设置为不完全衰减感兴趣的频带中的接收信号。 感兴趣的频带大于由该接收器分支处理的接收信号的载波带宽。 在一些实施例中，接收的信号不被衰减，并且相邻的干扰信号被部分衰减。 这允许关于干扰信号的信息出现在IQ不平衡引起的另一个接收机分支中信号的载波间图像中，有助于IQ失衡的数字估计和补偿。

公开(公告)号：US07787358B2

公开(公告)日：2010-08-31

申请号：US11844072

申请日：2007-08-23

申请人： Leif Wilhelmsson ,  Andreas Nevalainen ,  Jim Svensson

发明人： Leif Wilhelmsson ,  Andreas Nevalainen ,  Jim Svensson

IPC分类号： H04J11/00

CPC分类号： H04L25/03159 ,  H04L5/023 ,  H04L25/03006 ,  H04L27/2657 ,  H04L2025/03414

摘要： Inter-carrier interference (ICI) cancellation in an OFDMA receiving signals from two transmitters is performed by identifying the transmitted sub-carriers that cause the largest ICI to sub-carriers received from other transmitters, and removing the ICI contribution from these sub-carriers. This may be accomplished by calculating the ICI terms only based on the interfering sub-carrier and the frequency offset. Alternatively, the transmissions causing the ICI are demodulated, the ICI on other signals is then determined and subtracted, and other signals are then demodulated. Which transmissions cause the largest ICI on others depends on the relative strength of the corresponding sub-carriers and how much orthogonality is lost. The latter might be due to frequency error, Doppler spread, or a combination of both.

摘要翻译： 通过识别从其他发射机接收的导致最大ICI的子载波的发送子载波，并从这些子载波中移除ICI贡献，来执行来自两个发射机的OFDMA接收信号中的载波间干扰（ICI）消除。 这可以通过仅基于干扰子载波和频率偏移来计算ICI项来实现。 或者，导致ICI的传输被解调，然后确定和减去其他信号上的ICI，然后解调其他信号。 哪些传输导致其他最大的ICI取决于相应副载波的相对强度以及丢失多少正交性。 后者可能是由于频率误差，多普勒扩展或两者的组合。

公开(公告)号：US20090254598A1

公开(公告)日：2009-10-08

申请号：US12307351

申请日：2007-07-06

申请人： Jim Svensson ,  Thomas Olsson ,  Leif Wilhelmsson

发明人： Jim Svensson ,  Thomas Olsson ,  Leif Wilhelmsson

IPC分类号： G06F17/14

CPC分类号： G06F17/142 ,  H04L27/263 ,  H04L27/265

摘要： A method of processing a set of input data values comprises the steps of providing said input data values serially to circuitry comprising a number of memory elements; and performing in said circuitry a transform function to obtain a set of transformed data values. The method further comprises the steps of delaying a subset of said set of input data values under use of said memory elements; providing a modified set of data values by adding individual delayed data values to individual non-delayed data values from said set of input data values; and performing said transform function on said modified set of data values. In this way a transform function can be evaluated at fewer output data values than available input data values without increasing the memory requirements considerably.

摘要翻译： 一种处理一组输入数据值的方法包括以下步骤：将所述输入数据值串行提供给包括多个存储器元件的电路; 以及在所述电路中执行变换函数以获得一组经变换的数据值。 所述方法还包括以下步骤：在使用所述存储器元件的同时延迟所述一组输入数据值的子集; 通过将各个延迟数据值从所述输入数据值集合中的各个非延迟数据值增加来提供修改的数据值集合; 以及对所述修改的数据值集合执行所述变换函数。 以这种方式，可以以比可用输入数据值更少的输出数据值来评估变换函数，而不会显着增加内存需求。

公开(公告)号：US20150071391A1

公开(公告)日：2015-03-12

申请号：US14394531

申请日：2012-04-20

申请人： Leif Wilhelmsson ,  Roland Strandberg ,  Jim Svensson

发明人： Leif Wilhelmsson ,  Roland Strandberg ,  Jim Svensson

IPC分类号： H04B17/00 ,  H04B1/10

CPC分类号： H04B17/10 ,  H04B1/10 ,  H04L27/3863

摘要： A technique for calibrating a receiver apparatus comprising at least one analog signal processing component and an intermediate frequency, or IF, mixer for converting IF signals comprising an in-phase, or I, signal and a quadrature-phase, or Q, signal to baseband frequency signals is provided. The IF mixer is arranged downstream of the at least one analog signal processing component. A method implementation of the technique comprises the steps of determining, in a digital processing domain downstream of the IF mixer, a metric which is affected by a frequency dependency of an imbalance between I and the Q signal, or IQ-imbalance, over a signal bandwidth, generating, based on the metric thus determined, a calibration signal configured to at least partially compensate a frequency-dependency of the IQ imbalance, and feeding the calibration signal to the at least one analog signal processing component so as to calibrate the at least one analog signal processing component.

摘要翻译： 一种用于校准接收机装置的技术，包括至少一个模拟信号处理部件和中频或IF混频器，用于将包括同相或I信号和正交相位或Q信号的IF信号转换成基带 提供频率信号。 IF混合器布置在至少一个模拟信号处理部件的下游。 该技术的方法实现包括以下步骤：在IF混合器的下游的数字处理域中，确定受信号I和Q信号之间的不平衡或IQ不平衡的频率依赖性的影响的度量 带宽，基于如此确定的度量产生校准信号，所述校准信号被配置为至少部分地补偿IQ不平衡的频率依赖性，以及将所述校准信号馈送到所述至少一个模拟信号处理组件，以至少校准 一个模拟信号处理组件。

公开(公告)号：US07715515B2

公开(公告)日：2010-05-11

申请号：US11550907

申请日：2006-10-19

申请人： Thomas Olsson ,  Roland Strandberg ,  Jim Svensson

发明人： Thomas Olsson ,  Roland Strandberg ,  Jim Svensson

IPC分类号： H03D3/24

CPC分类号： H03L7/0991

摘要： The control word input to a Digitally Controlled Oscillator (DCO) is modified to reduce non-monotonic regions in the output response of the DCO. The DCO may be included in a Phase-Locked Loop (PLL) circuit for generating an output signal that locks onto either the phase or frequency of a reference signal input. By modifying the control word input to the DCO to avoid non-monotonic regions in the DCO output response, PLL phase noise is reduced. In one embodiment, the control word is modified by reordering or skipping control word values input to the DCO that correspond to non-monotonic regions in the output response of the DCO circuit.

摘要翻译： 输入到数字控制振荡器（DCO）的控制字被修改以减少DCO的输出响应中的非单调区域。 DCO可以被包括在锁相环（PLL）电路中，用于产生锁定到参考信号输入的相位或频率上的输出信号。 通过修改输入到DCO的控制字以避免DCO输出响应中的非单调区域，PLL相位噪声减小。 在一个实施例中，通过重新排序或跳过与DCO电路的输出响应中对应于非单调区域的DCO输入的控制字值来修改控制字。