公开(公告)号：WO2005125075A1

公开(公告)日：2005-12-29

申请号：PCT/EP2005/006268

申请日：2005-06-10

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON ,  WALLEN, Anders

Inventor： WALLEN, Anders

IPC: H04L1/20

CPC classification number: H04B1/10 ,  H04B2201/709727 ,  H04L1/20 ,  H04L2027/0065

Abstract: A receiver circuit provides improved noise estimation processing by at least partially removing receiver frequency error bias. An initial noise estimate is compensated using an error term based on the observed receiver frequency error, and the resulting compensated noise estimate can be used to improve other signal processing in the receiver. For example, the receiver may use compensated noise estimates to generate signal quality estimates, e.g., Signal-to-Interference (SIR) estimates, having improved accuracy. Additionally, or alternatively, the receiver may use the compensated noise estimates to generate RAKE combining weights having improved noise suppression characteristics. In an exemplary embodiment, the initial noise estimate is a noise correlation matrix generated from a received reference signal, e.g., pilot symbols, and the error term is an error matrix directly generated using the observed receiver frequency error and channel estimates taken from the reference signal.

Abstract translation: 接收机电路通过至少部分地去除接收机频率误差偏差来提供改进的噪声估计处理。 使用基于观察到的接收机频率误差的误差项来补偿初始噪声估计，并且所得到的补偿噪声估计可以用于改善接收机中的其他信号处理。 例如，接收机可以使用经补偿的噪声估计来产生具有提高的精度的信号质量估计，例如信号干扰（SIR）估计。 另外或替代地，接收机可以使用经补偿的噪声估计来生成具有改进的噪声抑制特性的RAKE组合权重。 在示例性实施例中，初始噪声估计是从接收的参考信号（例如，导频符号）产生的噪声相关矩阵，并且误差项是使用观测到的接收机频率误差和从参考信号获取的信道估计直接生成的误差矩阵 。

公开(公告)号：WO2007068407A1

公开(公告)日：2007-06-21

申请号：PCT/EP2006/011838

申请日：2006-12-08

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WALLEN, Anders ,  WILHELMSSON, Leif

Inventor： WALLEN, Anders ,  WILHELMSSON, Leif

IPC: H04L27/227 ,  H04L27/233 ,  H04L27/00

CPC classification number: H04L27/2271 ,  H04L27/2331 ,  H04L2027/0067 ,  H04L2027/0069

Abstract: A method and apparatus for compensation of noise in a received signal includes receiving a received signal comprised of a sum of a transmitted signal and a disturbance signal in a demodulator, summing the received signal and a compensation signal to produce a demodulation signal, determining a transmitted symbol based upon the demodulation signal, determining an error signal by calculating a difference between the demodulation signal and the determined transmitted symbol, and determining the compensation signal from the error signal using a model-based disturbance suppression control process. In at least one embodiment, the model-based disturbance suppression control process is a linear disturbance model control process.

Abstract translation: 用于补偿接收信号中的噪声的方法和装置包括在解调器中接收由发射信号和干扰信号之和组成的接收信号，对接收信号和补偿信号求和以产生解调信号， 基于解调信号的符号，通过计算解调信号和确定的发送符号之间的差来确定误差信号，以及使用基于模型的干扰抑制控制处理从误差信号确定补偿信号。 在至少一个实施例中，基于模型的干扰抑制控制过程是线性干扰模型控制过程。

公开(公告)号：WO2007147501A1

公开(公告)日：2007-12-27

申请号：PCT/EP2007/005154

申请日：2007-06-12

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  LINDOFF, Bengt ,  WALLEN, Anders

Inventor： LINDOFF, Bengt ,  WALLEN, Anders

IPC: H04Q7/38

CPC classification number: H04L27/261 ,  H04J11/0093 ,  H04L27/2656 ,  H04L27/2684 ,  H04W24/00 ,  H04W36/30 ,  H04W48/08 ,  H04W56/00 ,  H04W88/02

Abstract: A method and apparatus of an OFDM system that utilizes the synchronization channel, SCH, by the user equipment, UE, to obtain time synchronization information and to perform cell search. In order to perform the SCH detection, only a correlation between the known SCH signal and the received sequence is needed (201), hence the FFT is not involved in the synchronization step. Typically the SCH and pilot symbols are transmitted with a constant power which is the same for all base stations. Hence, based on the serving cell, SC, SCH and pilot symbols, the power relation between these signals is estimated (202, 203, 204) and the ratio applied when performing time synchronization to other cells i.e. correlation the received sequence with the SCH from that particular neighboring cell, to estimate the pilot signal strength for the neighboring cell (205, 206, 207).

Abstract translation: OFDM系统的方法和装置，其利用用户设备UE的同步信道SCH获得时间同步信息并执行小区搜索。 为了执行SCH检测，仅需要已知SCH信号和接收到的序列之间的相关（201），因此FFT不参与同步步骤。 通常，SCH和导频符号以对于所有基站相同的恒定功率发送。 因此，基于服务小区，SC，SCH和导频符号，估计这些信号之间的功率关系（202,203,204），以及当对其他小区执行时间同步时应用的比例，即将接收到的序列与SCH的相关 该相邻小区估计相邻小区（205,206,207）的导频信号强度。