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：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：US08798177B2

公开(公告)日：2014-08-05

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： H04K1/10 ,  H04L27/28

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：US09148234B2

公开(公告)日：2015-09-29

申请号：US13811674

申请日：2011-06-17

申请人： Lars Sundström ,  Jim Svensson ,  Leif Wilhelmsson

发明人： Lars Sundström ,  Jim Svensson ,  Leif Wilhelmsson

IPC分类号： H04B17/00 ,  H04B3/46 ,  H04L1/24 ,  H04L27/38 ,  H04B17/21 ,  H04B17/309 ,  H04L27/26 ,  H04B17/10 ,  H04B17/20

CPC分类号： H04B17/21 ,  H04B3/46 ,  H04B17/10 ,  H04B17/20 ,  H04B17/309 ,  H04L1/244 ,  H04L27/2647 ,  H04L27/3863

摘要： A test signal for determining a frequency-dependent or any other property of a receiver path is proposed. The test signal comprises, in a time domain representation, a sequence of discrete states that may be periodically repeated and that gives rise to a plurality of discrete tones in a frequency domain representation of the test signal. The test signal can be utilized for determining a frequency-dependent imbalance (e.g., an IQ imbalance) between different signal branches of a receiver or transmitter.

摘要翻译： 提出了用于确定接收机路径的频率依赖性或任何其他属性的测试信号。 测试信号在时域表示中包括可以周期性重复的离散状态序列，并且在测试信号的频域表示中产生多个离散音调。 测试信号可用于确定接收器或发射器的不同信号分支之间的频率相关不平衡（例如，IQ不平衡）。

公开(公告)号：US20150110161A1

公开(公告)日：2015-04-23

申请号：US14346103

申请日：2012-09-14

申请人： Martin Anderson ,  Henrik Sjöland ,  Lars Sundström ,  Jim Svensson

发明人： Martin Anderson ,  Henrik Sjöland ,  Lars Sundström ,  Jim Svensson

IPC分类号： H04B1/405 ,  H04L27/12

CPC分类号： H04B1/405 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D7/18 ,  H04L27/12

摘要： A mixer unit (30) for frequency translating, based on an LO signal, an input signal having one or more input signal components is disclosed. The mixer unit has a signal processing path (50a-d, 60a-d) from each Input terminal (32+, 32−) to each output terminal (34_I+, 34_I−, 34_Q+,34_Q−) of the mixer unit (30), The LO signal has an associated LO signal component (LO_Ia-d, LO_Qa-d) for each signal processing path. The mixer unit (30) comprises a plurality of mixer switches (70a-N) and a control unit (90). The control unit (90) is adapted to, for each signal processing path (50a-d, 60a-d), dynamically select an associated subset, in the following denoted active switch subset, of the plurality of mixer switches (70a-N) for operation in the signal processing path (50a-d, 60a˜d) such that which of the plurality of mixer switches (70a-N) belong to said active switch subset varies in time. At any instant in time, the union of all the active switch subsets is a strict subset, denoted combined active subset, of the plurality of mixer switches (70a-N). The control unit (90) is further adapted to activate only the mixer switches (70a-N) in said combined active subset by, for each mixer switch (70a-N) in the combined active subset, supplying the corresponding LO signal component to the mixer switch. A related radio receiver circuit (10), a related radio communication apparatus (1, 2), and a related method are also disclosed.

摘要翻译： 公开了一种用于基于LO信号频率转换具有一个或多个输入信号分量的输入信号的混频器单元（30）。 混合器单元具有从混合器单元（30）的每个输入端子（32+，32-）到混合器单元（30）的每个输出端子（34_I +，34_I-，34_Q +，34_Q-）的信号处理路径（50a-d，60a-d） LO信号具有针对每个信号处理路径的相关LO信号分量（LO_Ia-d，LO_Qa-d）。 混频器单元（30）包括多个混频器开关（70a-N）和控制单元（90）。 控制单元（90）适于对于每个信号处理路径（50a-d，60a-d），动态地选择多个混频器开关（70a-N）中的以下表示的有源开关子集中的相关子集， 用于在信号处理路径（50a-d，60a〜d）中操作，使得多个混频器开关（70a-N）中的哪一个属于所述有源开关子集在时间上变化。 在任何时刻，所有有源开关子集的并集是多个混频器开关（70a-N）中标明为组合有源子集的严格子集。 控制单元（90）还适于仅通过组合有源子集中的每个混合器开关（70a-N）激活所述组合有效子集中的混频器开关（70a-N），将相应的LO信号分量提供给 搅拌机开关 还公开了一种相关无线电接收机电路（10），相关无线电通信装置（1,2）及相关方法。

公开(公告)号：US09264091B2

公开(公告)日：2016-02-16

申请号：US14346103

申请日：2012-09-14

申请人： Martin Anderson ,  Henrik Sjöland ,  Lars Sundström ,  Jim Svensson

发明人： Martin Anderson ,  Henrik Sjöland ,  Lars Sundström ,  Jim Svensson

IPC分类号： H04B1/26 ,  H04B1/405 ,  H03D7/16 ,  H03D7/18 ,  H04L27/12

CPC分类号： H04B1/405 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D7/18 ,  H04L27/12

摘要： A mixer unit (30) for frequency translating, based on an LO signal, an input signal having one or more input signal components is disclosed. The mixer unit has a signal processing path (50a-d, 60a-d) from each Input terminal (32+, 32−) to each output terminal (34_I+, 34_I−, 34_Q+,34_Q−) of the mixer unit (30), The LO signal has an associated LO signal component (LO_Ia-d, LO_Qa-d) for each signal processing path. The mixer unit (30) comprises a plurality of mixer switches (70a-N) and a control unit (90). The control unit (90) is adapted to, for each signal processing path (50a-d, 60a-d), dynamically select an associated subset, in the following denoted active switch subset, of the plurality of mixer switches (70a-N) for operation in the signal processing path (50a-d, 60a˜d) such that which of the plurality of mixer switches (70a-N) belong to said active switch subset varies in time. At any instant in time, the union of all the active switch subsets is a strict subset, denoted combined active subset, of the plurality of mixer switches (70a-N). The control unit (90) is further adapted to activate only the mixer switches (70a-N) in said combined active subset by, for each mixer switch (70a-N) in the combined active subset, supplying the corresponding LO signal component to the mixer switch. A related radio receiver circuit (10), a related radio communication apparatus (1, 2), and a related method are also disclosed.

摘要翻译： 公开了一种用于基于LO信号频率转换具有一个或多个输入信号分量的输入信号的混频器单元（30）。 混合器单元具有从混合器单元（30）的每个输入端子（32+，32-）到混合器单元（30）的每个输出端子（34_I +，34_I-，34_Q +，34_Q-）的信号处理路径（50a-d，60a-d） LO信号具有针对每个信号处理路径的相关LO信号分量（LO_Ia-d，LO_Qa-d）。 混频器单元（30）包括多个混频器开关（70a-N）和控制单元（90）。 控制单元（90）适于对于每个信号处理路径（50a-d，60a-d），动态地选择多个混频器开关（70a-N）中的以下表示的有源开关子集中的相关子集， 用于在信号处理路径（50a-d，60a〜d）中操作，使得多个混频器开关（70a-N）中的哪一个属于所述有源开关子集在时间上变化。 在任何时刻，所有有源开关子集的并集是多个混频器开关（70a-N）中标明为组合有源子集的严格子集。 控制单元（90）还适于仅通过组合有源子集中的每个混合器开关（70a-N）激活所述组合有效子集中的混频器开关（70a-N），将相应的LO信号分量提供给 搅拌机开关 还公开了一种相关无线电接收机电路（10），相关无线电通信装置（1,2）及相关方法。

公开(公告)号：US20140148112A1

公开(公告)日：2014-05-29

申请号：US13811674

申请日：2011-06-17

申请人： Lars Sundström ,  Jim Svensson ,  Leif Wilhelmsson

发明人： Lars Sundström ,  Jim Svensson ,  Leif Wilhelmsson

IPC分类号： H04B17/00

CPC分类号： H04B17/21 ,  H04B3/46 ,  H04B17/10 ,  H04B17/20 ,  H04B17/309 ,  H04L1/244 ,  H04L27/2647 ,  H04L27/3863

摘要： A test signal for determining a frequency-dependent or any other property of a receiver path is proposed. The test signal comprises, in a time domain representation, a sequence of discrete states that may be periodically repeated and that gives rise to a plurality of discrete tones in a frequency domain representation of the test signal. The test signal can be utilized for determining a frequency-dependent imbalance (e.g., an IQ imbalance) between different signal branches of a receiver or transmitter.

摘要翻译： 提出了用于确定接收机路径的频率依赖性或任何其他属性的测试信号。 测试信号在时域表示中包括可以周期性重复的离散状态序列，并且在测试信号的频域表示中产生多个离散音调。 测试信号可用于确定接收器或发射器的不同信号分支之间的频率相关不平衡（例如，IQ不平衡）。

公开(公告)号：US08548096B2

公开(公告)日：2013-10-01

申请号：US12983006

申请日：2010-12-31

申请人： Chester Park ,  Jim Svensson

发明人： Chester Park ,  Jim Svensson

IPC分类号： H04L27/38 ,  H04L27/14 ,  H04L23/00

CPC分类号： H04L27/2659 ,  H04L27/0014 ,  H04L27/2647 ,  H04L27/28 ,  H04L2027/0026

摘要： Embodiments of user equipment and methods for determining IQ imbalance parameters are described. In some embodiments, a method for determining in-phase (I) and Quadrature (Q) imbalance (IQ imbalance) parameters based on a known signal in a dual-carrier receiver using at least one controllable frequency offset includes receiving a known signal modulated onto a first radio frequency (RF) carrier frequency and a second RF carrier frequency different than the first RF carrier frequency; downconverting the known signal to a baseband signal for the first and second carriers by conversion from the respective RF carrier frequencies to an intermediate frequency (IF) using a common RF local oscillator (LO) and by further conversion from IF to baseband using carrier specific IF LOs, wherein as a controllable frequency offset is used as a part of the conversion from at least one of RF to IF and IF to baseband through the LOs; removing any controllable frequency offset from the baseband signal for the first and second carriers to produce representations of the received signals of the first and second carriers; and deriving IQ imbalance parameters for each representation of the received signals of the first and second carriers using a least square estimate.

摘要翻译： 描述用于确定IQ不平衡参数的用户设备和方法的实施例。 在一些实施例中，基于使用至少一个可控频率偏移的双载波接收机中的已知信号来确定同相（I）和正交（Q）不平衡（IQ不平衡）参数的方法包括：接收已调制到 第一射频（RF）载波频率和与第一RF载波频率不同的第二RF载波频率; 通过使用公共RF本地振荡器（LO）从相应的RF载波频率转换到中频（IF）将已知信号下变频为第一和第二载波的基带信号，并且通过使用载波专用IF进一步从IF到基带的转换 LO，其中作为可控频率偏移用作从RF到IF和IF中的至少一个到通过LO的基带的转换的一部分; 从第一和第二载波的基带信号中去除任何可控频率偏移，以产生第一和第二载波的接收信号的表示; 以及使用最小平方估计来导出第一和第二载波的接收信号的每个表示的IQ不平衡参数。

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。