公开(公告)号：WO0247315A3

公开(公告)日：2003-01-23

申请号：PCT/EP0113778

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M ,  ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

CPC classification number: H04L1/007 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/08

Abstract: In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (= the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

Abstract translation: 在分组传输系统中，特别是无线传输系统，其中数据以不同的错误保护级别以分组传输，并且一个分组（=后续分组）的错误保护级别可能不同于前一分组的错误保护级别而不提供 在前一个分组和后续分组使用不同的错误保护级别的情况下，所述前一个和所述后续分组之间的代码终止可能会降级。 本发明在这些情况下提出在前一个分组之间插入补充分组，由此补充分组的错误保护等级高于由前一个或后续分组使用的最低的错误保护等级。

公开(公告)号：WO03015335A8

公开(公告)日：2004-04-08

申请号：PCT/EP0208211

申请日：2002-07-23

Applicant: ERICSSON TELEFON AB L M ,  PAULI MATHIAS ,  WACHSMANN UDO

Inventor： PAULI MATHIAS ,  WACHSMANN UDO

IPC: H04J11/00 ,  H04B7/06 ,  H04J1/02 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26

CPC classification number: H04L25/0204 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2662

Abstract: A method and a stage (60) for estimating channel coefficients in a multi carrier system operating in accordance with a block-code based transmit diversity scheme, in which a data content of a code matrix is multiplexed in a frequency domain are described. The method comprises determining a phase ramp (phi¿est

Abstract translation: 描述了一种用于估计在根据基于块码的发射分集方案操作的多载波系统中的信道系数的方法和阶段（60），其中码矩阵的数据内容在频域中多路复用。 该方法包括确定频域中的相位斜坡（phiestest）或时域中的等效（Deltat），相位斜坡（phiestest）或等效（Deltat）包括在接收器内 信号（Y），处理接收信号（Y_Deltat？）以去除相位斜坡（phiestest）或其等效（Deltat），并基于处理的接收信号估计信道系数。

公开(公告)号：WO02082844A3

公开(公告)日：2003-02-20

申请号：PCT/EP0203578

申请日：2002-03-28

Applicant: ERICSSON TELEFON AB L M ,  ZIMMERMANN GERD ,  PAULI MATHIAS ,  SCHRAMM PETER ,  KHUN-JUSH JAMSHID ,  GAFVELS LENNART ,  MALMGREN GOERAN

Inventor： ZIMMERMANN GERD ,  PAULI MATHIAS ,  SCHRAMM PETER ,  KHUN-JUSH JAMSHID ,  GAFVELS LENNART ,  MALMGREN GOERAN

IPC: H04J11/00 ,  H04L5/06 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W72/08 ,  H04Q7/36

CPC classification number: H04W16/14 ,  G01S7/021 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  H04L5/06 ,  H04W72/082

Abstract: The invention relates to a method and a device for controlling frequency selection within a wireless communication system in response to radar-like interference signals. The method comprises continuously or quasi-continuously monitoring and assessing a plurality of frequencies with respect to a radar-like interference signal and allocating a quality parameter to each assessed frequency, the quality parameter indicating the probability that the frequency is occupied. The method further comprises selecting one or more frequencies in dependence on the allocated quality parameters and subsequent frequency monitoring.

Abstract translation: 本发明涉及一种用于响应于类似雷达的干扰信号来控制无线通信系统内的频率选择的方法和装置。 该方法包括连续或准连续地监测和评估相对于类似雷达的干扰信号的多个频率，并且将质量参数分配给每个评估的频率，质量参数指示频率被占用的概率。 该方法还包括根据所分配的质量参数和随后的频率监测来选择一个或多个频率。

公开(公告)号：DE60317833T2

公开(公告)日：2008-10-30

申请号：DE60317833

申请日：2003-02-11

Applicant: ERICSSON TELEFON AB L M

Inventor： MEIXNER MICHAEL ,  PAULI MATHIAS ,  HOEGBERG MATS

IPC: H04B1/10 ,  H04B17/00

Abstract: A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna is fed through an analog part and a subsequent digital part of said receiver. The receiver has an element with a-priori known attenuation values for a predefined set of frequencies, a first branch-off element for deriving a first detection signal from the signal before the element and a second branch-off element for deriving a second detection signal from the signal after the element. The receiver processes the first and the second detection signal such that a difference between the first and second detection signal is comparable with a threshold value, where the threshold value depends on the a-priori known attenuation values of the element. Depending on the comparison result, a frequency is identified as interfering or not a co-existing radar system.

公开(公告)号：AT380419T

公开(公告)日：2007-12-15

申请号：AT04730233

申请日：2004-04-29

Applicant: ERICSSON TELEFON AB L M

Inventor： PAULI MATHIAS ,  WACHSMANN UDO ,  TSAI SHAWN

IPC: H04L1/20 ,  H04L1/00

公开(公告)号：DE60211868T2

公开(公告)日：2007-05-16

申请号：DE60211868

申请日：2002-03-01

Applicant: ERICSSON TELEFON AB L M

Inventor： PAULI MATHIAS ,  SACHSE ERIC ,  WACHSMANN UDO

IPC: H04J11/00 ,  H04L5/02 ,  H04B7/02 ,  H04B7/06 ,  H04B7/12 ,  H04B7/26 ,  H04J1/02 ,  H04J99/00 ,  H04L1/00 ,  H04L1/04 ,  H04L1/06 ,  H04L27/26

Abstract: The invention relates to a method of multiplexing data words in a multicarrier transmit diversity system. The method comprises the step of generating a plurality of data blocks, each data block comprising data words and each data word containing data symbols derived from a data signal, the step of determining for one or more data blocks in dependence on at least one transmission constraint if the data words of said one or more data blocks are to be multiplexed in the time domain or in the frequency domain and the step of multiplexing the data words of the data blocks in accordance with the determination result.

公开(公告)号：AT359649T

公开(公告)日：2007-05-15

申请号：AT02730271

申请日：2002-05-22

Applicant: ERICSSON TELEFON AB L M

Inventor： FRANK GEORG ,  PAULI MATHIAS ,  WACHSMANN UDO ,  SCHRAMM PETER

IPC: H04L27/26

Abstract: In order to correct frequency deviations of signals in a multicarrier system, such as a OFDM-system, the present invention provides a frequency tracker and a method to operate the same. The frequency tracker is based on a decision directed digital phase locked loop exhibiting a predictive character. On the basis of an estimated phase offset for a received signal (signal component, signal symbol) a predicted phase offset is calculated and applied to the signal (signal component, signal symbol). Further, received signals (signal components, signal symbols) are sampled and for each sample a sample phase offset to be corrected is calculated in dependence to the related estimated phase offset to incorporate the predictive character. In particular, the predicted sample phase offsets are calculated as a function of a corresponding predicted phase offset and a measure being indicative of a distance, in the time domain, between a corresponding phase reference point for the predicted phase offset and a phase reference point defined for a specific part of the received signal, preferably for a preceding preamble signal.

公开(公告)号：DE60113875T2

公开(公告)日：2006-04-20

申请号：DE60113875

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

Abstract: In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (= the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

公开(公告)号：AU1861102A

公开(公告)日：2002-06-11

申请号：AU1861102

申请日：2001-11-29

Applicant: ERICSSON TELEFON AB L M

Inventor： DAVIDSSON STEFAN ,  WALTHER ROGER ,  WENGER FABIAN ,  PAULI MATHIAS ,  SCHRAMM PETER ,  WACHSMANN UDO

IPC: H04J11/00 ,  H04L7/00 ,  H04L7/027 ,  H04L7/04 ,  H04L27/00 ,  H04L27/26

Abstract: A radio receiver system ( 30 ) comprises a radio receiver ( 41 ), a receiver sample clock ( 60 ), which is used for sampling a modulated base-band signal; and a timing correction unit ( 100 ). The timing correction unit ( 100 ) performs, in the frequency domain, a timing drift compensation between a transmitter sample clock ( 66 ) and the receiver sample clock ( 60 ). In one example context of implementation, the plural modulated radio frequency carriers have been modulated using Orthogonal Frequency Division Multiplexing (OFDM).

公开(公告)号：AT425620T

公开(公告)日：2009-03-15

申请号：AT07003236

申请日：2002-05-22

Applicant: ERICSSON TELEFON AB L M

Inventor： SCHRAMM PETER ,  WACHSMANN UDO ,  PAULI MATHIAS ,  FRANK GEORG

IPC: H04L27/26

Abstract: In order to correct frequency deviations of signals in a multicarrier system, such as a OFDM-system, the present invention provides a frequency tracker and a method to operate the same. The frequency tracker is based on a decision directed digital phase locked loop exhibiting a predictive character. On the basis of an estimated phase offset for a received signal (signal component, signal symbol) a predicted phase offset is calculated and applied to the signal (signal component, signal symbol). Further, received signals (signal components, signal symbols) are sampled and for each sample a sample phase offset to be corrected is calculated in dependence to the related estimated phase offset to incorporate the predictive character. In particular, the predicted sample phase offsets are calculated as a function of a corresponding predicted phase offset and a measure being indicative of a distance, in the time domain, between a corresponding phase reference point for the predicted phase offset and a phase reference point defined for a specific part of the received signal, preferably for a preceding preamble signal.