公开(公告)号：WO2011076488A1

公开(公告)日：2011-06-30

申请号：PCT/EP2010/067613

申请日：2010-11-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  WILHELMSSON, Leif ,  PARK, Chester ,  SUNDSTRÖM, Lars

Inventor： WILHELMSSON, Leif ,  PARK, Chester ,  SUNDSTRÖM, Lars

IPC: H04L27/26 ,  H04L27/38

CPC classification number: H04L27/2657 ,  H04L27/2675 ,  H04L27/3863

Abstract: The invention relates to a method and a receiver for clown-mixing a received signal in an Orthogonal Frequency Division Multiplexing (OFDM) system containing non-mirrored pilots to a baseband signal, comprising determining the down-mixing frequency based on a carrier frequency and a carrier frequency offset, wherein the carrier frequency offset is determined such that mirrored pilots are obtained in the baseband signal.

Abstract translation: 本发明涉及一种用于在包含非镜像导频到基带信号的正交频分复用（OFDM）系统中对接收信号进行小丑混合的方法和接收机，包括：基于载波频率确定下混频率; 载波频率偏移，其中确定载波频率偏移，使得在基带信号中获得镜像导频。

公开(公告)号：WO2011054762A1

公开(公告)日：2011-05-12

申请号：PCT/EP2010/066517

申请日：2010-10-29

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

Inventor： WILHELMSSON, Leif ,  SVENSSON, Jim

IPC: H04L25/02 ,  H04L25/03

CPC classification number: H04L27/2647 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/03159

Abstract: A receiver is operated so as to receive data conveyed on an Orthogonal Frequency Division Multiplexed (OFDM) signal transmitted on a plurality of sub- carriers. Such operation includes ascertaining which of the plurality of sub- carriers have a channel quality that satisfies one or more criteria. Then, sub- carriers are selected based on whether they have the channel quality that satisfies mentioned one or more criteria. The receiver then fully processes data streams only from the selected sub- carriers, wherein fully processing data streams comprises sub-carrier channel estimation or sub-carrier equalization or both sub- carrier channel estimation and sub-carrier equalization.

Abstract translation: 操作接收机以接收在多个子载波上发送的正交频分复用（OFDM）信号上传送的数据。 这种操作包括确定多个子载波中的哪一个具有满足一个或多个标准的信道质量。 然后，基于它们是否具有满足所述一个或多个标准的信道质量来选择子载波。 然后，接收机仅从所选择的子载波中完全处理数据流，其中完全处理数据流包括子载波信道估计或子载波均衡或副载波信道估计和副载波均衡。

公开(公告)号：WO2011026705A1

公开(公告)日：2011-03-10

申请号：PCT/EP2010/061346

申请日：2010-08-04

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  OLSSON, Thomas ,  WILHELMSSON, Leif ,  PARK, Chester ,  SUNDSTRÖM, Lars

Inventor： OLSSON, Thomas ,  WILHELMSSON, Leif ,  PARK, Chester ,  SUNDSTRÖM, Lars

IPC: H04B1/22 ,  H04W16/14 ,  H04W88/02

CPC classification number: H04W24/08 ,  H04B17/318 ,  H04B17/382

Abstract: A device may include a measurement receiver, a communication receiver, and a transmitter. The measurement receiver may include a receiver (RX) down-conversion component to receive an amplified signal from a low-noise amplifier of the communication receiver, selectively receive a signal from a first local oscillator associated with the communication receiver or a second local oscillator associated with the transmitter, and down-convert the amplified signal to baseband using the received signal from the first local oscillator or the second local oscillator. The measurement receiver may further include a delta- sigma analog-to-digital converter (ADC) to provide low quantization noise only for a particular frequency range to be measured, and a control component to configure the delta-sigma ADC to provide the low quantization noise at the particular frequency range.

Abstract translation: 设备可以包括测量接收器，通信接收器和发射器。 测量接收机可以包括接收器（RX）下变频部件，以从通信接收机的低噪声放大器接收放大的信号，有选择地从与通信接收器相关联的第一本地振荡器或第二本地振荡器相关联地接收信号 并且使用来自第一本地振荡器或第二本地振荡器的接收信号将放大的信号下变频到基带。 测量接收机可以进一步包括Δ-Σ模数转换器（ADC），以仅为要测量的特定频率范围提供低量化噪声;以及控制部件，用于配置Δ-ΣADC以提供低量化 在特定频率范围内的噪声。

公开(公告)号：WO2010089281A1

公开(公告)日：2010-08-12

申请号：PCT/EP2010/051191

申请日：2010-02-01

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

Inventor： WILHELMSSON, Leif

IPC: H04W16/14

CPC classification number: H04W72/02 ,  H04W16/14 ,  H04W52/243 ,  H04W88/06

Abstract: A communication device has a plurality of concurrently operating transceivers, each operating in a respectively different one of a plurality of communication systems, wherein the plurality of concurrently operating transceivers includes a first transceiver and a second transceiver. Operation of the communication device includes the first transceiver ascertaining whether transmissions by the second transceiver are causing interference in a receiver of the first transceiver and if so, performing one or more interference response actions. The one or more interference response actions include ascertaining whether the interference is at an acceptable level and if so then taking no further interference response actions. If the interference is ascertained to be at an unacceptable level, an interference mitigation request is communicated to the second transceiver. The second transceiver can, for example, shift its use of frequencies to a region whereby the first transceiver's band select filter can sufficiently attenuate the second transceiver's signal.

Abstract translation: 通信设备具有多个同时操作的收发器，每个收发器分别在多个通信系统中的不同的一个中工作，其中多个同时操作的收发器包括第一收发器和第二收发器。 通信设备的操作包括第一收发器，确定第二收发器的传输是否在第一收发器的接收机中引起干扰，如果是，执行一个或多个干扰响应动作。 所述一个或多个干扰响应动作包括确定干扰是否在可接受的水平，如果是，那么不采取进一步的干扰响应动作。 如果确定干扰处于不可接受的水平，则将干扰减轻请求传送到第二收发器。 例如，第二收发器可以将频率的使用转换到区域，由此第一收发器的频带选择滤波器可以充分地衰减第二收发信机的信号。

公开(公告)号：WO2009060023A2

公开(公告)日：2009-05-14

申请号：PCT/EP2008065045

申请日：2008-11-06

Applicant: ERICSSON TELEFON AB L M ,  LINDOFF BENGT ,  NILSSON JOHAN ,  WILHELMSSON LEIF ,  NORDSTROEM FREDRIK

Inventor： LINDOFF BENGT ,  NILSSON JOHAN ,  WILHELMSSON LEIF ,  NORDSTROEM FREDRIK

IPC: H04B7/02 ,  H04B7/08

CPC classification number: H04B7/086 ,  H04B17/345 ,  H04J11/005 ,  H04J11/0093 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0242

Abstract: A multi-branch OFDM receiver combines diversity signals received over different receiver branches using interference rejection combining. The receiver generates first channel estimates associated with a serving base station, second channel estimates associated with at least one non-serving base station, and a time offset between the serving base station and non-serving base station. The receiver computes a noise covariance matrix based on the second channel estimates and the time offset, and then combines the diversity signals received over different branches using the first channel estimates and the noise covariance matrix.

Abstract translation: 多分支OFDM接收机使用干扰抑制组合将通过不同接收机分支接收的分集信号进行组合。 接收机产生与服务基站相关联的第一信道估计，与至少一个非服务基站相关联的第二信道估计以及服务基站与非服务基站之间的时间偏移。 接收机基于第二信道估计和时间偏移计算噪声协方差矩阵，然后使用第一信道估计和噪声协方差矩阵组合在不同分支上接收的分集信号。

公开(公告)号：WO2007068438A3

公开(公告)日：2008-06-05

申请号：PCT/EP2006011935

申请日：2006-12-12

Applicant: ERICSSON TELEFON AB L M ,  WILHELMSSON LEIF ,  SVENSSON JIM ,  BERKEMAN ANDERS

Inventor： WILHELMSSON LEIF ,  SVENSSON JIM ,  BERKEMAN ANDERS

IPC: G06F17/14 ,  H04L27/26

CPC classification number: G06F17/142 ,  H04L27/265 ,  H04L27/2662

Abstract: A DIF FFT stage is used in an N bin FFT, wherein N is an even integer. The DIF FFT stage includes swap logic that receives a first input sample, x(v), and a second input sample, x(v + N/2), and selectively supplies either the first and second input samples at respective first and second swap logic output ports or alternatively the second and first input samples at the respective first and second swap logic output ports, wherein 0 = v

Abstract translation: 在N bin FFT中使用DIF FFT级，其中N是偶数整数。 DIF FFT级包括接收第一输入采样x（v）和第二输入采样x（v + N / 2）的交换逻辑，并且在相应的第一和第二交换处选择性地提供第一和第二输入采样 逻辑输出端口或备选地在相应的第一和第二交换逻辑输出端口处的第二和第一输入采样，其中0 = v

公开(公告)号：WO2008049714A1

公开(公告)日：2008-05-02

申请号：PCT/EP2007/060468

申请日：2007-10-02

Applicant: Telefonaktiebolaget LM Ericsson (publ) ,  WILHELMSSON, Leif ,  LINDOFF, Bengt

Inventor： WILHELMSSON, Leif ,  LINDOFF, Bengt

IPC: H04L27/26

CPC classification number: H04L1/20 ,  H04L25/0206 ,  H04L25/0212 ,  H04L27/2665

Abstract: Ascertaining a signal power of an Orthogonal Frequency Division Multiplexing (OFDM) signal involves ascertaining a plurality of channel estimates from the OFDM signal. Compensating phase shift values for phase aligning the plurality of channel estimates are estimated and used to generate phase corrected channel estimates. The phase corrected channel estimates are coherently combined, thereby ascertaining the signal power of the OFDM signal. The compensating phase shift values may be based on a channel characteristic (e.g., delay spread) or may alternatively be hypothesized.

Abstract translation: 确定正交频分复用（OFDM）信号的信号功率涉及确定来自OFDM信号的多个信道估计。 对相位对齐多个信道估计的补偿相移值进行估计并用于生成经相位校正的信道估计。 相位校正的信道估计被相干地组合，由此确定OFDM信号的信号功率。 补偿相移值可以基于信道特性（例如，延迟扩展）或者可以替换地被假设。

公开(公告)号：WO2007068724A1

公开(公告)日：2007-06-21

申请号：PCT/EP2006/069677

申请日：2006-12-13

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  LINDOFF, Bengt ,  WILHELMSSON, Leif

Inventor： LINDOFF, Bengt ,  WILHELMSSON, Leif

IPC: H04L27/26 ,  H04B1/10

CPC classification number: H04L27/2647 ,  H04B1/1036 ,  H04L25/0204 ,  H04L2025/03414

Abstract: A device (100, 200) and a method is provided for processing a signal. The device comprises a filter unit 5 (101, 201); an FFT unit (102, 202) operatively connected to the filter unit and being located after the filter unit along a signal path for the signal; and a compensation unit (103, 203) operatively connected to the FFT unit and being located after the FFT unit in the signal path. The compensation unit is adapted to compensate for attenuation of the signal, which has been caused by the filter unit.

Abstract translation: 提供了一种用于处理信号的装置（100,200）和方法。 该装置包括一个过滤器单元5（101,201）; FFT单元（102,202），其可操作地连接到所述滤波器单元并沿着所述信号的信号路径位于所述滤波器单元之后; 以及可操作地连接到FFT单元并位于信号路径中的FFT单元之后的补偿单元（103,203）。 补偿单元适于补偿由过滤单元引起的信号的衰减。

公开(公告)号：WO2005060118A1

公开(公告)日：2005-06-30

申请号：PCT/EP2004/014372

申请日：2004-12-13

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

Inventor： WILHELMSSON, Leif ,  REIAL, Andres

IPC: H04B1/707

CPC classification number: H04B1/7075 ,  G01S19/29 ,  G01S19/30 ,  H04B1/707 ,  H04B1/70735 ,  H04B1/70775 ,  H04B2201/70715

Abstract: A method of detecting a spreading code of a received spread-spectrum signal, in particular a spreading code identifying a space vehicle of a GPS system. The method comprises correlating the received spread-spectrum signal with a reference signal to detect the presence of one of a number of reference spreading codes. The correlating further comprises differentiating at least one of the received spread-spectrum signal, the reference signal, and the correlation signal, the correlating resulting in a differentiated correlation signal.

Abstract translation: 一种检测接收的扩频信号的扩展码的方法，特别是识别GPS系统的空间载波的扩展码。 该方法包括将接收到的扩频信号与参考信号进行相关，以检测多个参考扩展码之一的存在。 相关还包括区分接收的扩频信号，参考信号和相关信号中的至少一个，产生相关的微分相关信号。

公开(公告)号：WO2004100461A1

公开(公告)日：2004-11-18

申请号：PCT/EP2004/004241

申请日：2004-04-22

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  WILHELMSSON, Leif ,  TAORI, Rakesh

Inventor： WILHELMSSON, Leif ,  TAORI, Rakesh

IPC: H04L12/56

CPC classification number: H04W52/50 ,  H04W84/18

Abstract: A method of communicating messages among a number of radio communications devices via a communications medium, each of said messages comprising a message header and a message payload. The method comprises transmitting the message header of a first message, where the first message is to be transmitted from a first one of the number of radio communications devices to at least a second one of the number of radio communications devices, at a first power level high enough to enable each of the number of radio communications devices to receive the message header; transmitting the message payload of the first message at a second power level determined separately from the first power level to be high enough to enable the second radio communications device to receive the message payload.

Abstract translation: 一种通过通信介质在多个无线电通信设备之间传送消息的方法，每个所述消息包括消息报头和消息有效载荷。 该方法包括：将第一消息的消息标题从第一无线电通信装置中的第一消息发射到第一无线电通信装置中的至少第二个，至少第二消息标题的第一功率电平 足够高以使每个无线电通信设备能够接收消息报头; 以与第一功率电平分开确定的第二功率电平传输第一消息的消息有效载荷足够高以使得第二无线电通信装置能够接收消息有效载荷。