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1. 发明授权

US07138861B2 Load mismatch adaptation in coupler-based amplifiers 有权
公开(公告)号：US07138861B2
公开(公告)日：2006-11-21
申请号：US11025497
申请日：2004-12-29
申请人： Lars Sundström , Per-Olof Brandt
发明人： Lars Sundström , Per-Olof Brandt
IPC分类号： H03F3/68
CPC分类号： H03F1/0238 , H03F1/32 , H03F3/191 , H03F3/602 , H03F2200/192 , H03F2200/198 , H03F2200/204
摘要： Coupler-based amplifiers provide a measure of load mismatch based on the difference between the two output signal amplitudes from the amplifiers. This measure can be used to control variable matching networks (VMNs) or amplifier supply voltages to maintain constant distortion levels and high power transfer/efficiency and even to control output power. Load mismatch is measured by comparing the amplifier device output amplitudes and adjusting the circuit based on the comparison to counteract undesired behavior, such as increasing distortion levels.

2. 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。

3. 发明授权

US08611896B2 Neighbor cell list compilation methods and apparatus 有权
标题翻译：相邻小区列表编译方法和装置
公开(公告)号：US08611896B2
公开(公告)日：2013-12-17
申请号：US12615352
申请日：2009-11-10
申请人： Ali Nader , Tommy Sjögren , Lars Sundström
发明人： Ali Nader , Tommy Sjögren , Lars Sundström
IPC分类号： H04W4/00
CPC分类号： H04W48/16 , H04W48/18
摘要： A user equipment (UE) in a communication system can keep track of the cell/frequency deployment of a network operator preferred by the user, and based on the tracked information, the UE can build up its own user-specific Neighbor Cell List. When the UE is roaming, the UE does received-signal measurements according to cells and carrier frequencies identified in the broadcast Neighbor Cell Lists of the roamed-into network, but the UE also does received-signal measurements (with higher priority) according to the user-specific Neighbor Cell List that it has built up. Accordingly, a UE implementing a user-specific Neighbor Cell List analyzes its radio environment based on received signals and stores information about that environment, including user-preference information that prioritizes cells in the radio environment. The UE can then carry out cell search based on the stored environment and user-preference information.
摘要翻译：通信系统中的用户设备（UE）可以跟踪用户优选的网络运营商的小区/频率部署，并且基于跟踪的信息，UE可以建立其自己的用户特定的相邻小区列表。当UE正在漫游时，UE根据在漫游网络的广播相邻小区列表中标识的小区和载波频率接收信号测量，但是UE还根据接收信号测量（具有较高优先级），根据用户特定的邻居单元列表已经建立。因此，实施用户特定的相邻小区列表的UE基于接收到的信号来分析其无线电环境，并且存储关于该环境的信息，包括在无线电环境中对小区进行优先级排序的用户偏好信息。然后，UE可以基于存储的环境和用户偏好信息来执行小区搜索。

4. 发明授权

US08583170B2 Multi-band aggregated spectrum receiver employing frequency source reuse 有权
标题翻译：采用频率源重用的多频段聚合频谱接收机
公开(公告)号：US08583170B2
公开(公告)日：2013-11-12
申请号：US12611749
申请日：2009-11-03
申请人： Lars Sundström , Stefan Andersson , Roland Strandberg
发明人： Lars Sundström , Stefan Andersson , Roland Strandberg
IPC分类号： H04M1/00 , H04B1/16 , H04B1/10
CPC分类号： H04B1/0082
摘要： Efficient carrier aggregation is enabled in a receiver employing a single frequency source, and dividing the frequency source by different frequency dividing factors to generate two or more RF LO frequencies. Received signals are down-converted to intermediate frequencies by mixing with the respective RF LO frequencies. By utilizing only a single high frequency source, embodiments of the present invention avoid spurious and injection locking issues that arise when integrating two or more frequency sources, and additionally reduce power consumption as compared to a multiple frequency source solution.
摘要翻译：在采用单个频率源的接收机中启用有效的载波聚合，并且通过不同的分频因子来划分频率源以产生两个或更多个RF LO频率。接收的信号通过与相应的RF LO频率混合而被下变频到中频。通过仅利用单个高频源，本发明的实施例避免了在集成两个或多个频率源时产生的杂散和注入锁定问题，并且与多频率源解决方案相比，另外降低功耗。

5. 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。

6. 发明申请

US20130155748A1 Conversion Circuit 有权
标题翻译：转换电路
公开(公告)号：US20130155748A1
公开(公告)日：2013-06-20
申请号：US13702768
申请日：2011-06-13
申请人： Lars Sundström , Roland Strandberg
发明人： Lars Sundström , Roland Strandberg
IPC分类号： H02M5/02
CPC分类号： H04B1/16 , H02M5/02 , H03D3/007 , H03D7/1466 , H03D7/1483 , H03D7/1491 , H03D2200/0086 , H03M1/002 , H03M1/12 , H04B1/0032 , H04B1/30
摘要： A conversion circuit (20) for converting a complex analog input signal having an in-phase, I, component and a quadrature-phase, Q, component resulting from frequency down conversion of a radio-frequency, RF, signal (XRF) to a frequency band covering 0 Hz into a digital representation is disclosed. It comprises a channel-selection filter unit (40) arranged to filter the complex analog input signal, thereby generating a channel-filtered I and Q components, and one or more processing units (53, 53a-b). Each processing unit comprises four mixers (60-75) for generating a first and a second frequency-translated I component and a first and a second channel-filtered Q component based on two LO signals with equal LO frequency and a 90° mutual phase shift. Furthermore, each processing unit comprises a combiner unit (85, 120) for generating a first, a second, a third, and a fourth combined signal proportional to sums and differences between said frequency translated I and Q components. The first and the fourth combined signals form a first complex signal, and the second and the third combined signals form a second complex signal. Each processing unit further comprises four ADCs (110a-d, 115a-d) for providing digital representations of the first complex signal and the second complex signal for forming said digital representation of the analog complex input signal. A related radio receiver circuit and a related electronic apparatus are also disclosed.
摘要翻译：一种转换电路（20），用于将具有由射频RF信号（XRF）的下变频产生的同相，I分量和正交相位Q分量的复数模拟输入信号转换成公开了覆盖0Hz的数字表示的频带。它包括一个频道选择滤波器单元（40），用于对复合模拟输入信号进行滤波，从而产生一个通道滤波的I和Q分量，以及一个或多个处理单元（53,53a-b）。每个处理单元包括四个混频器（60-75），用于基于具有相同的LO频率和90°相移的两个LO信号产生第一和第二频率转换的I分量和第一和第二通道滤波的Q分量。此外，每个处理单元包括用于产生与所述频率转换的I和Q分量之间的和和差成比例的第一，第二，第三和第四组合信号的组合器单元（85,120）。第一和第四组合信号形成第一复信号，第二和第三组合信号形成第二复信号。每个处理单元还包括用于提供第一复数信号和第二复信号的数字表示的四个ADC（110a-d，115a-d），用于形成模拟复合输入信号的所述数字表示。还公开了相关的无线电接收机电路和相关的电子设备。

7. 发明申请

US20120182958A1 Reconfiguration of Active Component Carrier Set in Multi-Carrier Wireless Systems 有权
标题翻译：在多载波无线系统中重新配置有源分量载波集
公开(公告)号：US20120182958A1
公开(公告)日：2012-07-19
申请号：US13498195
申请日：2009-12-22
申请人： Ghyslain Pelletier , Lars Sundström
发明人： Ghyslain Pelletier , Lars Sundström
IPC分类号： H04W72/04
CPC分类号： H04L27/2605 , H04L5/001 , H04L5/0037 , H04L5/0053 , H04L5/0064 , H04L5/0087 , H04L5/0096 , H04W24/02 , H04W76/28
摘要： In a multi-carrier wireless system, potential problems from reconfiguring mobile station resources to accommodate changes in component-carrier configuration are mitigated by inserting a guard period each time the configuration of component carriers changes, so that transceiver reconfiguration can be carried out without interfering with ongoing transmission. A base station is configured to transmit data to a mobile station according to a first configuration of two or more component carriers, to determine that a change of configuration to a second component-carrier configuration is required, and to signal the change of configuration to the mobile station, using the first configuration of component carriers. The base station then refrains from transmitting data to the mobile station during a pre-determined guard interval of at least one transmission-time interval subsequent to the signaling of the change of configuration. After the guard interval, data is transmitted to the mobile station according to the second component-carrier configuration.
摘要翻译：在多载波无线系统中，通过在每次分量载波的配置改变时插入保护周期来减轻重新配置移动台资源以适应分量载波配置变化的潜在问题，从而可以在不干扰的情况下执行收发机重新配置正在进行传输。基站被配置为根据两个或更多个分量载波的第一配置向移动站发送数据，以确定需要将配置改变为第二分量载波配置，并将配置的改变信号发送到移动台，使用分量载波的第一配置。然后，基站在配置改变的信令之后的至少一个传输时间间隔的预定的保护间隔期间禁止向移动站发送数据。在保护间隔之后，根据第二分量载波配置将数据发送到移动台。

8. 发明申请

US20110223877A1 Radio White Space Sensing 有权
标题翻译：无线电空间感知
公开(公告)号：US20110223877A1
公开(公告)日：2011-09-15
申请号：US12720281
申请日：2010-03-09
申请人： Fredrik Tillman , Anders Rosenqvist , Lars Sundström
发明人： Fredrik Tillman , Anders Rosenqvist , Lars Sundström
IPC分类号： H04B1/06 , H04B17/00
CPC分类号： H04W16/14 , H04W24/10
摘要： User equipment comprising a receiver obtains information about a set of channels to be sensed in a sensing process, wherein each channel is associated with a respective one of a number of radio frequencies. The receiver obtains a radio frequency signal by simultaneously sensing two or more of the channels included in the set of channels. A total power level of the sensed two or more channels is measured, and a comparison result is generated by comparing the total power level of the sensed two or more channels with a predetermined power level. The user equipment is controlled based on the comparison result. For example, if the total power level is below a threshold, then the sensed channels can be considered to not be in use by external transmission equipment.
摘要翻译：包括接收器的用户设备在感测过程中获得关于要感测的一组信道的信息，其中每个信道与多个无线电频率中的相应一个相关联。接收机通过同时感测包括在该组信道中的两个或多个信道来获得射频信号。测量感测的两个或更多个通道的总功率电平，并且通过将所感测的两个或更多个信道的总功率电平与预定功率电平进行比较来生成比较结果。基于比较结果控制用户设备。例如，如果总功率水平低于阈值，则感测到的通道可被认为不被外部传输设备使用。

9. 发明授权

US07995975B2 Method and apparatus for signal peak-to-average ratio reduction 有权
标题翻译：信号峰均比降低的方法和装置
公开(公告)号：US07995975B2
公开(公告)日：2011-08-09
申请号：US11614596
申请日：2006-12-21
申请人： Lars Sundström
发明人： Lars Sundström
IPC分类号： H01Q11/12
CPC分类号： H04L27/2624 , H04B2201/70706
摘要： A method and apparatus taught herein reduce the peak-to-average ratio (PAR) of a complex-valued signal based on detecting peaks in the signal that are above a peak threshold, characterizing the detected peaks in Cartesian coordinates, generating cancellation pulses in Cartesian coordinates based on the detected peak characterizations. PAR reduction processing continues with canceling the detected peaks by combining the cancellation pulses with a correspondingly delayed version of the signal. Advantageously, peak detection may be performed in polar form using a computationally efficient peak detection algorithm that avoids calculation of the I and Q peak waveforms unless a signal peak beyond a defined threshold is present. In one or more embodiments, the generation and use of asymmetric and/or shaped cancellation pulses offers further performance advantages.
摘要翻译：本文教导的方法和装置基于检测到高于峰值阈值的信号中的峰值来表示复数值信号的峰值平均比（PAR），表征笛卡尔坐标中检测到的峰值，产生笛卡尔坐标中的取消脉冲基于检测到的峰值表征的坐标。通过将消除脉冲与信号的相应延迟版本组合，PAR减小处理继续消除检测到的峰值。有利地，峰值检测可以使用计算上有效的峰值检测算法以极性形式进行，其避免计算I和Q峰值波形，除非存在超出限定阈值的信号峰值。在一个或多个实施例中，不对称和/或成形的取消脉冲的产生和使用提供了进一步的性能优点。

10. 发明申请

US20110003609A1 Power Efficient Data Transmission 有权
标题翻译：高效数据传输
公开(公告)号：US20110003609A1
公开(公告)日：2011-01-06
申请号：US12633848
申请日：2009-12-09
申请人： Lars Sundström , Stefan Andersson , Bengt Lindoff , Stefan Parkvall
发明人： Lars Sundström , Stefan Andersson , Bengt Lindoff , Stefan Parkvall
IPC分类号： H04B7/00
CPC分类号： H04W52/0206 , Y02D70/1262 , Y02D70/1264 , Y02D70/24 , Y02D70/25
摘要： Teachings herein schedule a data transmission in a variable bandwidth wireless communication system based on the power efficiency of a mobile node. One or more processing circuits, of the mobile node or a network node, determine the value of a control setting that defines a power efficiency configuration of the mobile node. In one embodiment, for example, the power efficiency configuration indicates the mobile node is configured to operate at the maximum power efficiency attainable without the data rate of the data transmission falling below a minimum data rate required by a quality of service. Regardless, the one or more processing circuits select from different possible bandwidths of the data transmission a bandwidth that supports a given data rate and that, according to a power efficiency model that models power efficiency of the mobile node for the different possible bandwidths, yields a power efficiency comporting with the power efficiency configuration.
摘要翻译：这里的教导是基于移动节点的功率效率来调度可变带宽无线通信系统中的数据传输。移动节点或网络节点的一个或多个处理电路确定定义移动节点的功率效率配置的控制设置的值。在一个实施例中，例如，功率效率配置指示移动节点被配置为以可达到的最大功率效率工作，而数据传输的数据速率低于服务质量所要求的最小数据速率。无论如何，一个或多个处理电路从数据传输的不同可能带宽中选择支持给定数据速率的带宽，并且根据为不同可能带宽建模移动节点的功率效率的功率效率模型，产生一个功率效率与功率效率配置相匹配。

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