公开(公告)号：EP2137863A4

公开(公告)日：2013-03-06

申请号：EP07794185

申请日：2007-08-23

Applicant: ERICSSON TELEFON AB L M

Inventor： DENT PAUL W

IPC: H04L1/16 ,  H04L1/00 ,  H04L5/00

CPC classification number: H04L1/1614 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/0073 ,  H04L5/0053 ,  H04L2001/0093

公开(公告)号：EP2151066A4

公开(公告)日：2014-11-05

申请号：EP08705388

申请日：2008-02-07

Applicant: ERICSSON TELEFON AB L M

Inventor： DENT PAUL W

IPC: H04B1/707 ,  H04B1/7097 ,  H04J13/10

CPC classification number: H04J13/10 ,  H04B1/7097 ,  H04B2201/709709

公开(公告)号：WO2009113946A3

公开(公告)日：2009-11-05

申请号：PCT/SE2009050073

申请日：2009-01-26

Applicant: ERICSSON TELEFON AB L M

Inventor： DENT PAUL W

IPC: H04L25/03

CPC classification number: H04L25/03343 ,  H04L25/03834 ,  H04L2025/03414

Abstract: A method and apparatus for compensating for ISI is described herein. A transmitter (110) and receiver (120) work together to develop pulse shaped OFDM symbols with reduced inter-channel ISI between pulse-shaped OFDM symbols transmitted on different sub-carriers at the same time, and inter-block ISI between pulse-shaped OFDM symbols transmitted on the same sub-carrier at different times. In addition, a pre-compensation element (118) in the transmitter (110) and/or a post-compensation element (128) in the receiver (120) compensate for diagonal ISI occurring between pulse-shaped OFDM symbols transmitted on different sub-carriers at different times.

Abstract translation: 本文描述了用于补偿ISI的方法和装置。 发射机（110）和接收机（120）一起工作以同时显示在不同子载波上发射的脉冲形OFDM符号之间具有减少的信道间ISI的脉冲形OFDM符号，以及脉冲形状之间的块间ISI 在不同时间在同一子载波上发送的OFDM符号。 另外，接收器（120）中的发射器（110）和/或后补偿元件（128）中的预补偿元件（118）补偿在不同子载波上发射的脉冲形OFDM符号之间出现的对角线ISI， 运营商在不同时期。

公开(公告)号：WO2011080644A2

公开(公告)日：2011-07-07

申请号：PCT/IB2010055851

申请日：2010-12-15

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W ,  KRASNY LEONID

Inventor： DENT PAUL W ,  KRASNY LEONID

CPC classification number: H04L25/022 ,  H04L25/0222 ,  H04L25/0232

Abstract: A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times. A second processing unit subsequently processes the complex wave amplitudes to determine complex scattering coefficients, where each complex scattering coefficient corresponds to a respective scattering object in the wireless communication channel.

Abstract translation: 这里描述的接收机和接收处理方法通过对接收信号的信号带宽内的每个频率的多普勒频移（或延迟变化率）保持恒定的假设进行校正来改善信道估计的准确性。 为此，根据本发明的接收机包括具有多个处理单元的信道处理器。 第一处理单元处理在多个不同信号时间（或从其估计的复数传播信道系数）处的信号带宽内的多个频率中的每一个接收的参考值（例如，导频信号），以确定一组复波幅度 或者针对信号带宽中的多个频率中的每一个或者针对每个不同的信号时间。 第二处理单元随后处理复数波振幅以确定复散射系数，其中每个复散射系数对应于无线通信信道中的相应散射物体。

公开(公告)号：WO2008147298A3

公开(公告)日：2009-01-22

申请号：PCT/SE2008050152

申请日：2008-02-07

Applicant: ERICSSON TELEFON AB L M

Inventor： DENT PAUL W

IPC: H04B1/707

CPC classification number: H04J13/10 ,  H04B1/7097 ,  H04B2201/709709

Abstract: The technology in this application solves these problems (and others) and meets the desirable goals identified above (and others). The technology spreads a signal over an available discontinuous spectrum, such as a radio frequency band, so that the spread signal only occupies the non-contiguous spectrum. In this way, CDMA transmission and reception can be used in a fragmented or non-contiguous spectrum that otherwise would not be useable for direct sequence spreading. Spreading over non-contiguous portions of spectrum is preferably performed without producing unacceptable interference in portions of unavailable spectrum located between the allowed spectrum. By avoiding unacceptable interference in portions of unavailable spectrum located between the allowed spectrum, the unavailable spectrum may be used by other users or services.

Abstract translation: 在这个应用中的技术解决了这些问题（和其他），并满足了上述（和其他）所确定的理想目标。 该技术在可用的不连续频谱（例如射频频带）上传播信号，使得扩展信号仅占据非连续频谱。 以这种方式，CDMA发送和接收可以用于分段或不连续的频谱，否则不能用于直接序列扩展。 优选地在频谱的非连续部分上扩展，而不会在位于允许频谱之间的不可用频谱的部分中产生不可接受的干扰。 通过避免位于允许频谱之间的部分不可用频谱中的不可接受的干扰，不可用频谱可被其他用户或服务使用。

公开(公告)号：WO2010140131A2

公开(公告)日：2010-12-09

申请号：PCT/IB2010052470

申请日：2010-06-02

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W ,  KRASNY LEONID

Inventor： DENT PAUL W ,  KRASNY LEONID

IPC: H04L25/02

CPC classification number: H04L25/022 ,  H04L25/0222 ,  H04L25/0236 ,  H04L25/0248 ,  H04L25/03101

Abstract: The present invention uses newly received signal samples to update previously determined scatterer parameters, and therefore, reduces the processing effort required for characterizing scattering objects in a wireless channel. Broadly, the present invention determines a first set of scatterer parameters based on signal samples derived from signals received during one or more previous time interval, and determines an updated set of scatterer parameters for a subsequent time interval based on the first set of scatterer parameters and the new signal samples hi one exemplary embodiment, the receiver uses a continuous sequential update process, e.g., a per-symbol-period inverse Prony process, to update the scatters parameters !n another exemplar embodiment, the receiver uses an integrated Doppler approach to update the scatterer parameters.

Abstract translation: 本发明使用新接收的信号样本来更新先前确定的散射体参数，因此减少了在无线信道中表征散射物体所需的处理努力。 广泛地，本发明基于从在一个或多个先前时间间隔期间接收的信号导出的信号样本来确定第一组散射体参数，并且基于第一组散射体参数确定随后的时间间隔的更新的散射体参数集合，以及 新的信号样本在一个示例性实施例中，接收机使用连续的顺序更新过程，例如每符号周期逆Prony过程来更新分散参数！在另一示例性实施例中，接收机使用综合多普勒方法来更新 散射体参数。

公开(公告)号：WO2010001224A3

公开(公告)日：2010-04-08

申请号：PCT/IB2009006120

申请日：2009-06-30

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W

Inventor： DENT PAUL W

IPC: H04L27/34 ,  H04B1/707

CPC classification number: H04L27/3411 ,  H04B2201/70706 ,  H04L27/3416

Abstract: A transmitter and a method are described herein that can generate a radio signal with a reduced ratio of peak amplitude to root-mean-square amplitude which helps to improve the transmit efficiency of the transmitter's power amplifier. In addition, a receiver is also described herein that can decode the radio signal.

Abstract translation: 这里描述的发射机和方法可以生成具有减小的峰值幅度与均方根幅度的比率的无线电信号，这有助于提高发射机的功率放大器的发射效率。 另外，这里还描述了可以解码无线电信号的接收机。

公开(公告)号：WO2011077324A3

公开(公告)日：2011-09-01

申请号：PCT/IB2010055850

申请日：2010-12-15

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W

Inventor： DENT PAUL W

IPC: H04L5/00

CPC classification number: H04L5/0053 ,  H04L5/0048 ,  H04L5/0057

Abstract: A method and apparatus for efficiently providing a large volume of channel feedback, e.g.. for OFDM MISO and MIMO systems, is described herein. To that end, a mapping unit in an OFDM transceiver maps channel feedback values, e.g., received reference signal values or channel estimates derived therefrom, on a one-to-one basis to individual transmission subchannels. More particularly, the mapping unit maps a feedback value, e.g., the received reference value or a channel estimate derived therefrom, to a single transmission subchannel of an outgoing OFDM signal. For example, the mapping unit may map the feedback value to an input of a frequency transform unit, such as an inverse discrete Fourier transform unit, to map the feedback value to a single transmission subchannel comprising an OFDM transmission subcarrier. The OFDM transceiver transmits the outgoing OFDM signal to the remote transceiver to provide the feedback value to the remote transceiver.

Abstract translation: 这里描述了用于有效地提供大量信道反馈的方法和设备，例如用于OFDM MISO和MIMO系统的方法和设备。 为此，OFDM收发器中的映射单元以一对一的方式将信道反馈值（例如，接收到的参考信号值或从中导出的信道估计值）映射到单独的传输子信道。 更具体地说，映射单元将反馈值（例如接收到的参考值或从中导出的信道估计）映射到输出OFDM信号的单个传输子信道。 例如，映射单元可将反馈值映射到频率变换单元（诸如离散傅里叶逆变换单元）的输入，以将反馈值映射到包括OFDM传输子载波的单个传输子信道。 OFDM收发器将输出的OFDM信号发送到远程收发器以将反馈值提供给远程收发器。

公开(公告)号：WO2010046748A3

公开(公告)日：2011-01-06

申请号：PCT/IB2009007160

申请日：2009-10-19

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W

Inventor： DENT PAUL W

IPC: H04B1/707 ,  H04J13/00

CPC classification number: H04B1/707 ,  H04B2201/70701 ,  H04J13/004 ,  H04L5/0051 ,  H04L25/0228

Abstract: A method and apparatus for using the same multiplexed radio resource to simultaneously transmit a pilot sequence and an information signal is described herein. After traveling through a multi-path propagation channel (20), a receiver (200) receives the transmitted pilot and information signals, correlates the received signal (R) with the known pilot sequence to determine one or more correlation values, and estimates the multi- path propagation channel based on the correlation values. The receiver uses the channel estimates to process the received signal to remove the pilot sequence from the information signal. By using the same multiplexed radio resource to transmit both the pilot sequence and the user information signal, the present invention enables more radio resources to be allocated to the information signal without compromising pilot- based channel estimation, and provides more regular access to the transmitted pilot sequence at the receiver.

Abstract translation: 本文描述了使用相同的多路复用无线资源同时发送导频序列和信息信号的方法和装置。 在多路径传播通道（20）行进之后，接收器（200）接收所发射的导频信息信号，使接收的信号（R）与已知导频序列相关，以确定一个或多个相关值， - 基于相关值的路径传播信道。 接收机使用信道估计来处理接收到的信号以从信息信号中去除导频序列。 通过使用相同的多路复用无线电资源来传送导频序列和用户信息信号，本发明使得能够在不损害基于导频的信道估计的情况下将更多的无线电资源分配给信息信号，并且提供对发射的导频 接收器上的序列。

公开(公告)号：WO2010100551A2

公开(公告)日：2010-09-10

申请号：PCT/IB2010000438

申请日：2010-03-03

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL W

Inventor： DENT PAUL W

CPC classification number: H04L27/2626 ,  H04L25/0202 ,  H04L25/0242 ,  H04L27/2634 ,  H04L27/2647

Abstract: An improved channel estimation technique is provided herein that determines accurate scatterer parameters for the scattering objects in the wireless channel, and extrapolates the scatterer parameters in both time and frequency to characterize the scattering objects for a different time and a different frequency. In one embodiment, a wireless device determines scatterer parameters that characterizes the scattering objects of a reception channel, and extrapolates the scatterer parameters in both time and frequency to predict the scatterer parameters for a future time and frequency, e.g., a future transmission time and frequency.

Abstract translation: 本文提供了一种改进的信道估计技术，其确定无线信道中散射物体的准确的散射体参数，并且在时间和频率上外推散射体参数以表征不同时间和不同频率的散射物体。 在一个实施例中，无线设备确定表征接收信道的散射对象的散射体参数，并且在时间和频率上推断散射体参数以预测未来时间和频率的散射体参数，例如未来的传输时间和频率 。