公开(公告)号：WO2012065638A1

公开(公告)日：2012-05-24

申请号：PCT/EP2010/067670

申请日：2010-11-17

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  HAGEN, Derek ,  BJÖRK, Vimar ,  ROLÉN, Claes

Inventor： HAGEN, Derek ,  BJÖRK, Vimar ,  ROLÉN, Claes

IPC: H03G3/20

CPC classification number: H04B1/10 ,  H03G3/3078

Abstract: A receiver system (100, 200) with controllable attenuators (105, 115, 125) and a component (135) with a limited input range, arranged to receive as its input signal the output signal from the attenuators. The receiver system also comprises a compensation circuit (140) which varies the level of the output signal of the component and a control loop (145, 245, 250, 255) which monitors the component and controls at least one attenuator (105, 115, 125) to be active or inactive so that the level of the signal to the component is within the input range, and controls the compensation circuit (140) to keep the output signal of the component constant. The control of the compensation circuit and attenuators between the component and said at least one attenuator is carried out in synchronicity with the propagation of the received signal through the attenuator chain (100) from said at least one attenuator.

Abstract translation: 具有可控衰减器（105,115,125）和具有有限输入范围的部件（135）的接收机系统（100,200），被布置为接收来自衰减器的输出信号作为其输入信号。 该接收机系统还包括一个补偿电路（140），该补偿电路改变该部件的输出信号的电平和一个控制回路（145,245,250,255），该控制回路监控该部件并控制至少一个衰减器（105,115,255） 125）被激活或不活动，使得到组件的信号的电平在输入范围内，并且控制补偿电路（140）以保持该分量的输出信号恒定。 对组件和所述至少一个衰减器之间的补偿电路和衰减器的控制与来自所述至少一个衰减器的衰减器链（100）的接收信号的传播同步地进行。

公开(公告)号：WO2009138125A1

公开(公告)日：2009-11-19

申请号：PCT/EP2008/055976

申请日：2008-05-15

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  BJÖRK, Vimar

Inventor： BJÖRK, Vimar

IPC: H03G3/30

CPC classification number: H03G3/3052

Abstract: The present invention relates to a method, an Automatic Gain Control (AGC) control unit and a receiver for Noise change output signalling. It also relates to an Adjustment Unit (AU), a receiver and a base band detector for adjustment of an Automatic Gain Control (AGC) output signal on the basis of the Noise change output signalling. In a first step a receiver receives (801) a communication input signal (sιn). In a second step at least one Automatic Gain Control (AGC) attenuator or amplifier in the receiver attenuates (802) the communication input signal. In a third step the receiver produces at least one AGC output signal. In a fourth step at least one AGC control unit in the receiver initiates (803) a changed gain setting on the receiver. This is made when the level of an AGC control unit input signal received by the unit has been below a first threshold level or above a second threshold level during a detection interval. What particularly characterizes the method is that the AGC control unit produces (804) a Noise change output signal.

Abstract translation: 本发明涉及一种方法，一种自动增益控制（AGC）控制单元和一个用于噪声改变输出信令的接收机。 它还涉及调整单元（AU），接收器和基带检测器，用于基于噪声变化输出信号调整自动增益控制（AGC）输出信号。 在第一步骤中，接收机接收（801）通信输入信号（s？n）。 在第二步骤中，接收器中的至少一个自动增益控制（AGC）衰减器或放大器衰减（802）通信输入信号。 在第三步骤中，接收器产生至少一个AGC输出信号。 在第四步骤中，接收器中的至少一个AGC控制单元在接收器上启动改变的增益设置（803）。 当在该检测间隔期间当由该单元接收的AGC控制单元输入信号的电平已经低于第一阈值电平或高于第二阈值电平时进行。 该方法的特征在于AGC控制单元产生（804）噪声改变输出信号。

公开(公告)号：WO2019059819A1

公开(公告)日：2019-03-28

申请号：PCT/SE2017/050912

申请日：2017-09-19

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： LIAO, Jichang ,  HAMMARBERG, Erik ,  BJÖRK, Vimar

IPC: H04B1/10 ,  H03G3/30

CPC classification number: H04B1/109 ,  H03G3/3068 ,  H03G3/3078

Abstract: A method performed by a radio network node for deciding an Automatic Gain Control (AGC) mode to be used for a received signal in a wireless communications network is provided. The radio network node estimates (301) a type of interference scenario affecting the received signal and obtains (302) information about channel quality of channels between the radio network node and connected wireless devices. Based on the estimated type of interference scenario and the obtained information about the channel quality, the radio network node dynamically decides (303) for the received signal, which AGC mode out of the following ACG modes to be used: - a slow AGC using a release timer for releasing an AGC state, - a fast AGC using a release timer for releasing an AGC state, and - a fast AGC using a trigger timer triggering an AGC state a first time interval before an interference period, and the release timer releasing the AGC state a second time interval after said interference period ends.

公开(公告)号：WO2018009106A1

公开(公告)日：2018-01-11

申请号：PCT/SE2016/050691

申请日：2016-07-06

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： BRAUN, Christian ,  BJÖRK, Vimar ,  KARLSSON, Jonas B.

IPC: H04B17/14

Abstract: In a method for calibrating at least two cross coupled antenna element groups in an antenna array, calibrating (S1) the antenna elements within each group of antenna elements. Further, in a respective calibration transceiver in each group, measuring (S2) a coupled signal within each group and a cross-coupled signal originating in another of the at least two groups. In addition, determining (S3) a respective relative phase and amplitude difference between said at least two groups based on the measured coupled signal and said cross-coupled signal, and determining (S4) the true phase and amplitude difference between the at least two groups based on the determined respective relative phase and amplitude differences. Finally, calibrating (S5) the at least two antenna groups based on the determined true phase and amplitude difference.

Abstract translation: 在用于校准天线阵列中的至少两个交叉耦合的天线元件组的方法中，校准（S1）每组天线元件内的天线元件。 此外，在每组中的相应校准收发器中，测量（S2）每组内的耦合信号和源自该至少两组中的另一组的交叉耦合信号。 另外，基于所测量的耦合信号和所述交叉耦合信号确定（S3）所述至少两个组之间的相应相对相位和幅度差，并且确定（S4）所述至少两个组之间的真实相位和幅度差 基于确定的各个相对相位和幅度差。 最后，基于确定的真实相位和幅度差校准（S5）至少两个天线组。

公开(公告)号：WO2016192763A1

公开(公告)日：2016-12-08

申请号：PCT/EP2015/062036

申请日：2015-05-29

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： BJÖRK, Vimar ,  ROLÉN, Claes

IPC: H03M1/10 ,  H03M1/12

CPC classification number: H03M1/1038 ,  H03M1/1004 ,  H03M1/1215

Abstract: It is provided a provided a time-interleaved analog-to-digital converter (ADC) system comprising an input port configured to receive an analog signal, an ADC-array comprising M, M≥2, ADCs arranged in parallel. Each ADC is configured to receive and to convert a portion of the analog signal into a digital signal at a sample rate f s . The ADC-system further comprises a reference ADC configured to receive and to convert the analog signal into a digital reference signal at an average sampling rate f ref lower than f s . Each sampling instant of the reference ADC corresponds to a sampling instant of an ADC in the array of ADCs, and the ADC to select for each reference ADC sampling instant is randomized over time. The ADC-system also comprises a correction module configured to adjust the digital signal outputs of the ADC- array into a corrected digital output signal based on samples of the digital reference signal and the digital signals from the corresponding selected ADCs. It is also provided a method for time-interleaved analog-to-digital conversion.

Abstract translation: 提供了一种提供的时间交织的模数转换器（ADC）系统，包括被配置为接收模拟信号的输入端口，包括M，M≥2的ADC阵列，并行布置的ADC。 每个ADC被配置为以采样率fs接收并将模拟信号的一部分转换成数字信号。 ADC系统还包括参考ADC，其被配置为以低于fs的平均采样率fref接收并将模拟信号转换为数字参考信号。 参考ADC的每个采样时刻对应于ADC阵列中的ADC的采样时刻，并且每个参考ADC采样时刻的ADC选择随时间随机化。 ADC系统还包括校正模块，该校正模块被配置为基于数字参考信号和来自相应选择的ADC的数字信号的样本将ADC阵列的数字信号输出调整为校正的数字输出信号。 还提供了一种用于时间交织的模数转换的方法。

公开(公告)号：WO2019192691A1

公开(公告)日：2019-10-10

申请号：PCT/EP2018/058645

申请日：2018-04-04

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： JAKOBSSON, Peter ,  THOREBÄCK, Johan ,  BJÖRK, Vimar

IPC: H04B7/06 ,  H04L25/03

Abstract: A transmission beam change method is disclosed for a wireless communication transmitter adapted to transmit an orthogonal frequency division multiplex (OFDM) signal using a transmission beam of a plurality of transmission beams available at the wireless communication transmitter. The method comprises temporarily adapting an output power during a transmission beam change from one transmission beam to another transmission beam. Typically, the transmission beam change is performed during a cyclic prefix (CP) of an OFDM symbol and the temporary adaptation is applied to only a part of the CP. Temporarily adapting the output power may comprise decreasing the output power to initiate the temporary adaptation and increasing the output power to terminate the temporary adaptation. For example, the temporary adaptation may be performed during all transmission beam changes or only when an occurrence frequency of transmission beam changes is higher than a threshold value. Corresponding arrangement, network node, baseband unit, wireless communication device and computer program product are also disclosed.

公开(公告)号：WO2016155839A1

公开(公告)日：2016-10-06

申请号：PCT/EP2015/057375

申请日：2015-04-02

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： GUSTAVSSON, Ulf ,  JACOBSSON, Sven ,  DURISI, Giuseppe ,  BJÖRK, Vimar ,  COLDREY, Mikael ,  SUNDSTRÖM, Lars

IPC: H04B7/08 ,  H03M1/12 ,  H04B1/06 ,  H04B1/16 ,  H04B1/30

CPC classification number: H04B7/0885 ,  H04B1/06 ,  H04B1/16 ,  H04B7/0417 ,  H04B2001/305 ,  H04L27/2649

Abstract: The present disclosure relates to a wireless communication node comprising at least one array antenna (1; 1') configured to receive a radio signal, said array antenna (1; 1') comprising a plurality (M) of receiving antenna devices (2), each of said antenna devices (2) being connected to a respective receiving circuit (3) which is configured for processing said radio signal. Each receiving circuit (3) comprises a demodulator (4; 11), an analog-to-digital converter (5; 12, 13) and a decoder (6; 14), the demodulator (4; 11) being configured to receive an analog signal from the corresponding receiving antenna device (2) and to output a demodulated analog signal to said analog-to-digital converter (5; 12, 13) which outputs a converted digital signal to the decoder (6; 14). Furthermore, the node is configured for adding a direct current, DC, offset value to said demodulated analog signal wherein the combined offset values of said node follow a predetermined distribution of values, having a variance, over the analog-to-digital converters (5; 12, 13). The disclosure also relates to a method for communication over a wireless node, and an antenna arrangement.

Abstract translation: 本公开涉及一种无线通信节点，包括被配置为接收无线电信号的至少一个阵列天线（1; 1'），所述阵列天线（1; 1'）包括多个（M）接收天线装置（2） ，每个所述天线装置（2）连接到被配置用于处理所述无线电信号的各个接收电路（3）。 每个接收电路（3）包括解调器（4; 11），模拟 - 数字转换器（5; 12,13）和解码器（6; 14），所述解调器（4; 11） 来自相应的接收天线装置（2）的模拟信号，并将解调的模拟信号输出到所述模数转换器（5; 12,13），该转换器将转换的数字信号输出到解码器（6; 14）。 此外，节点被配置为将直流DC偏移值添加到所述解调模拟信号，其中所述节点的组合偏移值在模数转换器（5）上遵循具有方差的预定分布值 ; 12,13）。 本公开还涉及一种用于通过无线节点通信的方法和天线装置。

公开(公告)号：WO2012089255A1

公开(公告)日：2012-07-05

申请号：PCT/EP2010/070881

申请日：2010-12-29

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  HAGEN, Derek ,  BJÖRK, Vimar ,  ROLÉN, Claes ,  WIDHE, Torbjörn Gunnar

Inventor： HAGEN, Derek ,  BJÖRK, Vimar ,  ROLÉN, Claes ,  WIDHE, Torbjörn Gunnar

IPC: H04B1/12

CPC classification number: H04B1/16 ,  H04B1/126

Abstract: A receiver circuit (100) comprising first (110) and second (120) receivers for demodulating first (A) and second (B) parts, respectively, of a received signal. The receiver circuit (100) also comprises an adjustment circuit (115) for adjusting the demodulated signal from the first receiver (110). The output signal (Rx0Ut) from the adjustment circuit (115) is used as output signal (Rx0Ut) from the receiver circuit (100) which also comprises an adjustment value circuit (125) for determining an adjustment value (Δ) for the adjustment circuit (115) in adjusting the output signal from the first receiver (110). The adjustment value circuit (125) receives the demodulated signal from the second (120) receiver and the output signal from the adjustment circuit (115) and uses differences between these input signals for forming said adjustment value (Δ). The first receiver (110) and the second receiver (120) have different transfer functions within one and the same frequency range.

Abstract translation: 一种接收机电路（100），包括分别用于解调接收信号的第一（A）和第二（B）部分的第一（110）和第二（120）接收机。 接收器电路（100）还包括用于调整来自第一接收器（110）的解调信号的调整电路（115）。 来自调整电路（115）的输出信号（Rx0Ut）被用作来自接收机电路（100）的输出信号（Rx0Ut），接收机电路（100）还包括用于确定调整电路的调整值（α）的调整值电路（125） （115），用于调整来自第一接收器（110）的输出信号。 调整值电路（125）接收来自第二（120）接收机的解调信号和来自调整电路（115）的输出信号，并使用这些输入信号之间的差来形成所述调整值（α）。 第一接收器（110）和第二接收器（120）在一个和相同的频率范围内具有不同的传递函数。

公开(公告)号：WO2010034360A1

公开(公告)日：2010-04-01

申请号：PCT/EP2008/066460

申请日：2008-11-28

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  HYLLANDER, Thord ,  ANDRÉ, Tore Mikael ,  BJÖRK, Vimar ,  LARSSON, Daniel ,  ÖSTERLING, Jacob ,  REXBERG, Leonard ,  WIDHE, Torbjörn

Inventor： HYLLANDER, Thord ,  ANDRÉ, Tore Mikael ,  BJÖRK, Vimar ,  LARSSON, Daniel ,  ÖSTERLING, Jacob ,  REXBERG, Leonard ,  WIDHE, Torbjörn

IPC: H04L27/26

CPC classification number: H04L27/2647 ,  H04L27/2602 ,  H04L27/2626

Abstract: 10A base station arrangement for forming an OFDM signal from a baseband signal includes a partitioning unit configured to partition a block of baseband signal samples into sub-blocks. A subcarrier mapper (2S) maps the sub-blocks onto adjacent sub-carrier blocks of an OFDM multi-carrier to form corresponding un-prefixed OFDM symbols. A cyclic prefix adder (24) adds a cyclic prefix to each mapped sub-block to form prefixed OFDM symbols. Phase compensators (30) perform phase compensations forcing the un-prefixed OFDM symbol part of all subsequently up-converted prefixed OFDM symbols to start at the same phase. Up-converters (34, 36) up-convert the phase compensated prefixed OFDM symbols to respective radio frequency bands having center frequencies and bandwidths that preserve the OFDM multi-carrier structure. A combiner (14) combines the up-converted phase compensated prefixed OFDM symbols into an OFDM signal.

Abstract translation: 用于从基带信号形成OFDM信号的10A基站装置包括：分配单元，被配置为将基带信号样本块划分成子块。 子载波映射器（2S）将子块映射到OFDM多载波的相邻子载波块上，以形成对应的未加前缀的OFDM符号。 循环前缀加法器（24）将循环前缀添加到每个映射子块以形成前缀OFDM符号。 相位补偿器（30）执行相位补偿，迫使所有随后上变频的前缀OFDM符号的未经前缀的OFDM符号部分在相同相位开始。 上转换器（34,36）将相位补偿的前缀OFDM符号上变频到具有保持OFDM多载波结构的中心频率和带宽的各个无线频带。 组合器（14）将经上变频的相位补偿的前缀OFDM符号组合成OFDM信号。

公开(公告)号：WO2007073253A1

公开(公告)日：2007-06-28

申请号：PCT/SE2005/002006

申请日：2005-12-22

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  BJÖRK, Vimar

Inventor： BJÖRK, Vimar

IPC: H04B1/48 ,  H03G3/30 ,  H03F3/72 ,  H03G3/34 ,  H04B1/52

CPC classification number: H04B1/525 ,  H03F1/26 ,  H03F1/301 ,  H03F3/601 ,  H03F3/72 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/255 ,  H03F2200/27 ,  H03F2200/372 ,  H03F2200/423 ,  H03F2200/451 ,  H03F2203/7203

Abstract: The invention refers to a TDD based radio communication system comprising a sender (1) arranged to transmit during a TX period and a receiver (4) arranged to receive during an RX period being a TX off period. The system also comprises a PA (5) arranged to enhance the power of the signal to be transmitted during the TX. The invention is characterised in that the system comprises a bias control (10) arranged to change the bias of a key transistor (8) comprised in the PA (5) to a level below a predetermined threshold value during the TX off period so that noise from the PA (5) is attenuated or inhibited.

Abstract translation: 本发明涉及一种基于TDD的无线电通信系统，其包括被布置为在TX周期期间发送的发送器（1）和布置成在RX周期期间接收TX发送周期的接收器（4）。 该系统还包括PA（5），其被布置成在TX期间增强要发送的信号的功率。 本发明的特征在于，该系统包括偏置控制器（10），该偏置控制器（10）被布置成在TX关闭期间将包括在PA（5）中的键晶体管（8）的偏置改变到低于预定阈值的电平，使得噪声 从PA（5）被衰减或抑制。