公开(公告)号：WO2008009358A1

公开(公告)日：2008-01-24

申请号：PCT/EP2007/006002

申请日：2007-07-06

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  SVENSSON, Jim ,  WILHELMSSON, Leif ,  OLSSON, Thomas

Inventor： SVENSSON, Jim ,  WILHELMSSON, Leif ,  OLSSON, Thomas

IPC: G06F17/14 ,  H04L27/26

CPC classification number: G06F17/142 ,  H04L27/263 ,  H04L27/265

Abstract: A method of processing a set of input data values comprises the steps of providing said input data values serially to circuitry (10) comprising a number of memory elements (14, 15, 16, 17, 24, 25, 34); 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 (14, 15, 16, 17, 24, 25, 34); 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.

Abstract translation: 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（14,15,16,17,24,25,34）的电路（10）; 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。 该方法还包括以下步骤：在使用所述存储器元件（14,15,16,17,24,25,34）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：WO2007089180A1

公开(公告)日：2007-08-09

申请号：PCT/SE2006/000161

申请日：2006-02-03

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BOTTOMLEY, Gregory, E. ,  WILHELMSSON, Leif

Inventor： BOTTOMLEY, Gregory, E. ,  WILHELMSSON, Leif

IPC: H04L27/26 ,  H04J11/00

CPC classification number: H04L25/022 ,  H04L5/0017 ,  H04L5/0023 ,  H04L27/2607 ,  H04L27/265 ,  H04L27/2653 ,  H04L27/2662 ,  H04W16/14

Abstract: Method, communication system, receiver, baseband processor and computer program for recovering data from a received OFDM-signal containing recurrent redundant information where part of the recurrent redundant information is used to maximize the SINR (Signal to Interference plus Noise Ratio) of the received OFDM-signal.

Abstract translation: 方法，通信系统，接收机，基带处理器和计算机程序，用于从包含循环冗余信息的接收的OFDM信号中恢复数据，其中部分循环冗余信息用于使接收的OFDM的SINR（信号干扰加噪声比）最大化 -信号。

公开(公告)号：WO2006111843A1

公开(公告)日：2006-10-26

申请号：PCT/IB2006/000962

申请日：2006-04-21

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  FAULKNER, Michael

Inventor： WILHELMSSON, Leif ,  FAULKNER, Michael

IPC: H04L27/26

CPC classification number: H04L27/2647 ,  H04L25/0216 ,  H04L25/03006 ,  H04L25/03821 ,  H04L27/2607

Abstract: Inter-carrier interference (ICI) in a k th sub-carrier of an orthogonal frequency division multiplexing (OFDM) signal received at time / is reduced, wherein the received OFDM signal comprises a plurality of sub-carriers. This is achieved by generating a self-interference term, ICI k-L, k-L for a signal received on sub-carrier k-L , wherein L ε [..., - 3,- 2, -1,1, 2,-3,...] , and wherein the self- interference term is an estimate of the data received at time t on the sub-carrier k - L , weighted by a rate of change of the channel through which sub-carrier k - L passes at time t . An ICI cancellation coefficient, G L is obtained depending on a non-rectangular time domain windowing function, and an estimated ICI term is generated by adjusting the self-interference term, ICI k-L,k-L , by an amount based on the ICI cancellation coefficient, G L . The estimated ICI term is then subtracted from a term representing a signal received on the k th sub-carrier at time t .

Abstract translation: 在时间/接收的正交频分复用（OFDM）信号的第k个子载波中的载波间干扰（ICI）被减少，其中所接收的OFDM信号包括多个子载波。 这通过产生自干扰项ICI K-L，k-L来实现

公开(公告)号：WO2006111277A1

公开(公告)日：2006-10-26

申请号：PCT/EP2006/003175

申请日：2006-04-07

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  WILHELMSSON, Leif

Inventor： WILHELMSSON, Leif

IPC: H04L27/26 ,  H04L25/02

CPC classification number: H04L25/0232 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0234 ,  H04L27/2647 ,  H04L27/2665

Abstract: A Doppler spread value of a channel in an Orthogonal Frequency Division Multiplexing (OFDM) system is estimated, wherein the channel comprises a plurality of carrier frequencies. Estimating involves selecting a set of two or more carrier frequencies from the plurality of carrier frequencies. A Doppler spread value is estimated for each of the selected carrier frequencies. An estimate of the Doppler spread value of the channel is produced by combining the estimated Doppler spread values of each of the selected carrier frequencies. For example, the Doppler spread value of the channel may be estimated by averaging the estimated Doppler spread values of each of the selected carrier frequencies.

Abstract translation: 估计正交频分复用（OFDM）系统中的信道的多普勒扩展值，其中信道包括多个载波频率。 估计涉及从多个载波频率中选择一组两个或多个载波频率。 针对所选择的载波频率估计多普勒扩展值。 通过组合所选择的载波频率中的每一个的估计的多普勒扩展值来产生信道的多普勒扩展值的估计。 例如，可以通过对所选择的载波频率中的每一个的估计多普勒扩展值求平均来估计信道的多普勒扩展值。

公开(公告)号：WO2006111275A2

公开(公告)日：2006-10-26

申请号：PCT/EP2006/003173

申请日：2006-04-07

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON ,  BERKEMAN, Anders ,  SVENSSON, Jim ,  WILHELMSSON, Leif

Inventor： BERKEMAN, Anders ,  SVENSSON, Jim ,  WILHELMSSON, Leif

IPC: H04L27/26 ,  H04L1/20

CPC classification number: H04L25/0232 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0234 ,  H04L27/2647 ,  H04L27/2665

Abstract: 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.

Abstract translation: 产生在电信系统中的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。