公开(公告)号：WO2012038338A1

公开(公告)日：2012-03-29

申请号：PCT/EP2011/066101

申请日：2011-09-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  MU, Fenghao ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

Inventor： MU, Fenghao ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars

IPC: H03D7/16 ,  H03D7/18

CPC classification number: H04L27/389 ,  H03D7/166 ,  H03D2200/0088 ,  H04B1/126 ,  H04L25/08

Abstract: A complex intermediate frequency mixer (IFM) for frequency translating a received complex intermediate frequency, IF, signal, wherein the received complex IF signal comprises at least two frequency bands located at upper-side and lower-side of 0Hz, is provided. The complex intermediate frequency mixer comprises a first, second, third and fourth mixer (M1, M2, M3, M4). The complex intermediate frequency mixer further comprises a first, second, third and fourth gain adjusting component (α1, α2, δ2, δ1), connected to a first, second, third and fourth mixer output (M1-out, M2-out, M3-out, M4-out), respectively. Moreover, a first summing unit (S1), connected to a first gain output (α1-out), a fourth gain output (δ1-out) and a third mixer output (M3-out) negated, and second summing unit (S2), connected to the second gain output (α2-out), the third gain output (δ2-out) and the fourth mixer output (M4-out), are configured to output a first baseband complex signal of the received complex IF signal.

Abstract translation: 一种用于频率转换接收的复合中频IF（IF）信号的复合中频混频器（IFM），其中接收到的复合IF信号包括位于0Hz的上侧和下侧的至少两个频带。 复合中频混频器包括第一，第二，第三和第四混频器（M1，M2，M3，M4）。 复合中频混频器还包括连接到第一，第二，第三和第四混频器输出（M1-out，M2-out，M3）的第一，第二，第三和第四增益调整组件（a1，a2，d2，d1） -out，M4-out）。 此外，连接到第一增益输出（a1-out），第四增益输出（d1-out）和第三混频器输出（M3-out）的第一求和单元（S1）被否定，以及第二加法单元（S2） ，连接到第二增益输出（a2-out），第三增益输出（d2-out）和第四混频器输出（M4-out），被配置为输出接收到的复合IF信号的第一基带复信号。

公开(公告)号：WO2011110964A1

公开(公告)日：2011-09-15

申请号：PCT/IB2011/050633

申请日：2011-02-16

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

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

IPC: H04L27/38

CPC classification number: H04L27/3863

Abstract: RF impairment parameters, including frequency- dependent IQ imbalance, are estimated in a wideband received signal on a per- sub-band (or per sub-band pair) basis. In one embodiment, block- type pilot signals are received, such as on SCH, and IQ imbalance and carrier frequency offset are estimated from the block- type pilot signals. Data and comb- type pilot signals are then received on all sub-bands. Phase noise and channel coefficients are estimated for the first sub-band, based on the IQ imbalance and carrier frequency offset estimates. IQ imbalance is then successively estimated, on a per- sub- band (or per sub-band pair) basis, based on the comb- type pilot signals, the previously estimated carrier frequency offset estimate, and the phase noise and IQ imbalance estimates from prior sub-bands (or pairs). This may comprise iterative estimation based on decision feedback.

Abstract translation: 在每个子带（或每个子带对）的宽带接收信号中估计RF损伤参数，包括频率相关的IQ不平衡。 在一个实施例中，接收到块类型的导频信号，例如在SCH上，并且从块型导频信号估计IQ不平衡和载波频率偏移。 然后在所有子带上接收数据和梳状导频信号。 基于IQ不平衡和载波频率偏移估计，针对第一子带估计相位噪声和信道系数。 然后，基于梳状导频信号，先前估计的载波频率偏移估计以及相位噪声和IQ不平衡估计，基于每个子带（或每个子带对）来逐次估计IQ不平衡。 先前的子带（或对）。 这可以包括基于判决反馈的迭代估计。

公开(公告)号：WO2011061164A2

公开(公告)日：2011-05-26

申请号：PCT/EP2010/067523

申请日：2010-11-16

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  STATTIN, Hans ,  CARLBERG, Erik ,  MATTISSON, Sven

Inventor： WILHELMSSON, Leif ,  STATTIN, Hans ,  CARLBERG, Erik ,  MATTISSON, Sven

IPC: H04W16/14

CPC classification number: H04W16/14 ,  H04W88/06

Abstract: A communication device has a controller operatively connected to at least a first transceiver and a second transceiver, wherein the first transceiver receives signals on one or more channels within a first frequency band and the second transceiver transmits signals on one or more channels within a second frequency band, wherein the first and second frequency bands are adjacent one another so that each of the first and second frequency bands has an adjacent border and a nonadjacent border. Coexistence between the first and second transceivers is achieved by adjusting receive and/or transmit filters associated with the transceivers to create a guard band that is located more in the first frequency band if the second transceiver is using frequencies close to its adjacent border, and a guard band that is more in the second frequency band if the second transceiver is not using frequencies close to its adjacent border.

Abstract translation: 通信设备具有可操作地连接到至少第一收发器和第二收发器的控制器，其中第一收发器在第一频带内的一个或多个信道上接收信号，并且第二收发器在第二频率内的一个或多个信道上发送信号 带，其中所述第一和第二频带彼此相邻，使得所述第一和第二频带中的每一个具有相邻边界和不相邻的边界。 通过调整与收发器相关联的接收和/或发射滤波器来实现第一和第二收发器之间的共存，以产生更靠近第一频带的保护频带，如果第二收发器使用接近其相邻边界的频率，以及 如果第二收发器不使用靠近其相邻边界的频率，则在第二频带中更多的保护频带。

公开(公告)号：WO2011023226A1

公开(公告)日：2011-03-03

申请号：PCT/EP2009/060945

申请日：2009-08-25

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

Inventor： WILHELMSSON, Leif ,  LINDOFF, Bengt

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W88/06

Abstract: A method for initial scanning of frequencies at start-up of a multi-band cellular communication apparatus is disclosed. The method comprises determining (100) whether there is any interfering signal from any other communication system transmitting at a frequency in vicinity of frequencies of frequency bands of which the multi-band cellular communication apparatus is supposed to establish contact with a base station in at least one of the frequencies within the frequency bands. If the determination (100) gives a result of no interfering signal (102), a first scan procedure (104) is applied comprising plain scanning of the frequencies of the frequency bands of which the multi-band cellular communication apparatus is supposed to establish contact with a base station in at least one of the frequencies within the frequency bands, or if the determination gives a result of an interfering signal (102), a second scan procedure (106) is applied, taking into account the determined interfering signal. A frequency scanning apparatus (206) for initial scanning, and a radio access circuitry for such initial scanning is also disclosed.

Abstract translation: 公开了一种用于在多频带蜂窝通信设备启动时的频率初始扫描的方法。 该方法包括确定（100）是否存在来自任何其他通信系统的任何干扰信号，所述干扰信号至少在至少与基站建立接触的频带的频率附近发射 频段内的频率之一。 如果确定（100）给出无干扰信号（102）的结果，则应用第一扫描过程（104），其包括多频带蜂窝通信设备应建立联系的频带的频率的平均扫描 其中基站处于频带内的至少一个频率，或者如果确定给出干扰​​信号（102）的结果，则考虑所确定的干扰信号，应用第二扫描过程（106）。 还公开了一种用于初始扫描的频率扫描装置（206）和用于这种初始扫描的无线电接入电路。

公开(公告)号：WO2010089344A1

公开(公告)日：2010-08-12

申请号：PCT/EP2010/051350

申请日：2010-02-04

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  PARKVALL, Stefan ,  SKÖLD, Johan

Inventor： WILHELMSSON, Leif ,  PARKVALL, Stefan ,  SKÖLD, Johan

IPC: H04W72/12

CPC classification number: H04W72/1215 ,  H04L1/1887

Abstract: A communication device has a first transceiver (Bluetooth) that operates in a first communication system in the presence of or collocated with a second transceiver (e.g. LTE, WIMAX) that operates in a second communication system that is unrelated to the first communication system. A scheduler of packets for transmission by the first transceiver uses information about when the second communication system will be transmitting a signal that will interfere with reception by the first transceiver, and schedules data for which re-transmission is not essential in those time slots in which an implicit NACK is expected due to the second transceiver's operation. The first transceiver support a first type of link having a QoS requirement requiring retransmission and a second type of link having a QoS requirement which permits but does not require retransmission.

Abstract translation: 通信设备具有在第一通信系统中操作的第一收发器（蓝牙），其在与第一通信系统无关的第二通信系统中操作的第二收发器（例如，LTE，WIMAX）的存在或并置的情况下操作。 用于由第一收发器发送的分组调度器使用关于第二通信系统将何时发送将干扰第一收发器的接收的信号的信息，并且在其中的这些时隙中调度重传的数据不是必需的 由于第二收发器的操作，期望隐式NACK。 第一收发机支持具有需要重传的QoS要求的第一类型的链路和具有许可但不需要重传的QoS要求的第二类型的链路。

公开(公告)号：WO2010086404A1

公开(公告)日：2010-08-05

申请号：PCT/EP2010/051079

申请日：2010-01-29

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif ,  SUNDSTRÖM, Lars ,  CELANDER, Jan

Inventor： WILHELMSSON, Leif ,  SUNDSTRÖM, Lars ,  CELANDER, Jan

IPC: H03G3/20 ,  H03G3/30

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: A gain control circuit adjusts the signal level of a received signal responsive to the bandwidth a received signal and/or the delay spread of the channel in which the signal has propagated. The bandwidth and delay spread are evaluated to estimate the amount of signal variation that is expected due to fast fading. Adjustments to the signal level are then made to avoid clipping while at the same time ensuring that the dynamic range of a receiver component is efficiently utilized.

Abstract translation: 增益控制电路响应于接收信号的带宽和/或信号已经传播的信道的延迟扩展来调整接收信号的信号电平。 评估带宽和延迟扩展以估计由于快速衰落所预期的信号变化量。 然后进行对信号电平的调整，以避免削波，同时确保接收器组件的动态范围得到有效利用。

公开(公告)号：WO2009080578A1

公开(公告)日：2009-07-02

申请号：PCT/EP2008/067502

申请日：2008-12-15

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON ,  ANDGART, Niklas ,  BERNHARDSSON, Bo ,  NORDSTRÖM, Fredrik ,  WILHELMSSON, Leif

Inventor： ANDGART, Niklas ,  BERNHARDSSON, Bo ,  NORDSTRÖM, Fredrik ,  WILHELMSSON, Leif

IPC: H04L27/26 ,  H03G3/20

CPC classification number: H04L27/2647 ,  H03G3/3052 ,  H03G3/3078

Abstract: A method and apparatus for adjusting the gain of an amplifier (202) in a communication receiver comprising: estimating the power of a time domain signal (307); estimating the power distribution on one or more sub-carriers of a frequency domain signal (309) transformed from the time domain signal; and generating a gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal (311).

Abstract translation: 一种用于调整通信接收机中的放大器（202）的增益的方法和装置，包括：估计时域信号的功率（307）; 估计从时域信号变换的频域信号（309）的一个或多个子载波上的功率分布; 以及基于所述时域信号的估计功率和所述频域信号（311）的子载波上的功率分配来生成用于所述放大器的增益控制信号。

公开(公告)号：WO2008155238A3

公开(公告)日：2008-12-24

申请号：PCT/EP2008/057041

申请日：2008-06-05

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

Inventor： LINDOFF, Bengt ,  WILHELMSSON, Leif

IPC: H04L27/26

Abstract: A method, and associated apparatus and system, for simultaneous cell group and cyclic prefix (CP) detection, having the steps of determining primary synchronization signal (P-SyS) timing τ using the P-SyS; based on τ, determine a secondary synchronization signal (S-SyS) timing; placing a single Fast Fourier Transform (FFT) window; FFT processing the signal to obtain the frequency domain S-SyS symbols; equalizing the frequency domain S-SyS signal; phase correcting the S-SyS signal; and detecting the cell group and CP length by the correlation giving maximum energy.

公开(公告)号：WO2008049714A8

公开(公告)日：2008-07-10

申请号：PCT/EP2007060468

申请日：2007-10-02

Applicant: ERICSSON TELEFON AB L M ,  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从OFDM信号确定多个信道估计。 用于相位对准多个信道估计的补偿相移值被估计并用于产生相位校正信道估计。 相位校正的信道估计被相干组合，从而确定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），或者可以替代地假设。

公开(公告)号：WO2008074734A1

公开(公告)日：2008-06-26

申请号：PCT/EP2007/063947

申请日：2007-12-14

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  WILHELMSSON, Leif ,  NEVALAINEN, Andreas ,  SVENSSON, Jim

Inventor： WILHELMSSON, Leif ,  NEVALAINEN, Andreas ,  SVENSSON, Jim

IPC: H04L25/03 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04L5/023 ,  H04L25/03248 ,  H04L25/03821

Abstract: Inter-carrier interference (ICI) cancellation is performed on a received signal comprising signals transmitted by a transmitter to a plurality of users. ICI cancellation is performed for a given user by identifying the signals transmitted to other users that cause the largest ICI to signals transmitted to the receiving user, and selectively removing the ICI contribution from these transmissions. This may be acc omplished by calculating the ICI terms based on an es timate of the transmitted signal calculated as the received signal divided by an estimate of the channel. Alternatively, the transmissions causing the ICI may be selectively demodulated and decoded, and the improved estimates of the transmitted signal used for ICI estimation and cancellation. Which transmissions cause the largest ICI on others depends on the relative strength of the corresponding data and pilot symbols and how much orthogonality is lost.

Abstract translation: 对包括由发射机发送到多个用户的信号的接收信号执行载波间干扰（ICI）消除。 通过识别发送给其他用户的信号，使得最大ICI发送到接收用户的信号，并且从这些传输中选择性地去除ICI贡献，对给定的用户执行ICI消除。 这可以通过基于被计算为接收信号除以信道的估计的传输信号的时间计算ICI项来计算。 或者，可以选择性地解调和解码导致ICI的传输，以及用于ICI估计和消除的传输信号的改进的估计。 哪些传输导致其他最大的ICI取决于相应的数据和导频符号的相对强度以及丢失多少正交性。