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1. 发明申请

WO2008074730A1 UPLINK INTER-CARRIER INTERFERENCE CANCELLATION FOR OFDMA SYSTEMS 审中-公开
标题翻译：用于OFDMA系统的UPLINK INTER-CARRIER INTERFERENCE CANCELLATION OF OFDMA SYSTEMS
公开(公告)号：WO2008074730A1
公开(公告)日：2008-06-26
申请号：PCT/EP2007/063933
申请日：2007-12-14
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , NEVALAINEN, Andreas , SVENSSON, Jim
发明人： WILHELMSSON, Leif , NEVALAINEN, Andreas , SVENSSON, Jim
IPC分类号： H04L25/03 , H04L27/26
CPC分类号： H04L25/03159 , H04L5/023 , H04L25/03006 , H04L27/2657 , H04L2025/03414
摘要： Inter-carrier interference (ICI) cancellation in an OFDMA receiving signals from two transmitters is performed by identifying the transmitted sub-carriers that cause the largest ICI to sub-carriers received from other transmitters, and removing the ICI contribution from these sub- carriers. This may be accomplished by calculating the ICI terms only based on the interfering sub-carrier and the frequency offset. Alternatively, the transmissions causing the ICI are demodulated, the ICI on other signals is then determined and subtracted, and other signals are then demodulated. Which transmissions cause the largest ICI on others depends on the relative strength of the corresponding sub-carriers and how much orthogonality is lost. The latter might be due to frequency error, Doppler spread, or a combination of both.
摘要翻译：通过识别从其他发射机接收到的最大ICI到子载波的发送子载波，并从这些子载波中移除ICI贡献，来执行来自两个发射机的OFDMA接收信号中的载波间干扰（ICI）消除。这可以通过仅基于干扰子载波和频率偏移来计算ICI项来实现。或者，导致ICI的传输被解调，然后确定和减去其他信号上的ICI，然后解调其他信号。哪些传输导致其他最大的ICI取决于相应副载波的相对强度以及丢失多少正交性。后者可能是由于频率误差，多普勒扩展或两者的组合。

2. 发明申请

WO2008074734A1 INTER-CARRIER INTERFERENCE CANCELLATION FOR OFDMA SYSTEMS 审中-公开
标题翻译： OFDMA系统的互操作干扰消除
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
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , NEVALAINEN, Andreas , SVENSSON, Jim
发明人： WILHELMSSON, Leif , NEVALAINEN, Andreas , SVENSSON, Jim
IPC分类号： H04L25/03 , H04L27/26
CPC分类号： H04L27/2647 , H04L5/023 , H04L25/03248 , H04L25/03821
摘要： 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.
摘要翻译：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。

3. 发明申请

WO2008049714A1 ROBUST AND LOW-COMPLEXITY COMBINED SIGNAL POWER ESTIMATION FOR OFDM 审中-公开
标题翻译： OFDM的稳健和低复杂度组合信号功率估计
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
申请人： Telefonaktiebolaget LM Ericsson (publ) , WILHELMSSON, Leif , LINDOFF, Bengt
发明人： WILHELMSSON, Leif , LINDOFF, Bengt
IPC分类号： H04L27/26
CPC分类号： H04L1/20 , H04L25/0206 , H04L25/0212 , H04L27/2665
摘要： 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.
摘要翻译：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。

4. 发明申请

WO2007068724A1 METHOD AND DEVICE FOR SIGNAL PROCESSING 审中-公开
标题翻译：用于信号处理的方法和装置
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
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , LINDOFF, Bengt , WILHELMSSON, Leif
发明人： LINDOFF, Bengt , WILHELMSSON, Leif
IPC分类号： H04L27/26 , H04B1/10
CPC分类号： H04L27/2647 , H04B1/1036 , H04L25/0204 , H04L2025/03414
摘要： 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.
摘要翻译：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。

5. 发明申请

WO2004100461A1 WIRELESS AD HOC COMMUNICATION WITH DIFFERENT POWER LEVELS FOR MESSAGE HEADER AND PAYLOAD 审中-公开
标题翻译：无线电通信与不同功率级别的消息头和负载
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
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , TAORI, Rakesh
发明人： WILHELMSSON, Leif , TAORI, Rakesh
IPC分类号： H04L12/56
CPC分类号： H04W52/50 , H04W84/18
摘要： 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.
摘要翻译：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。

6. 发明申请

WO2008135541A1 DETERMINING A FREQUENCY ERROR IN A RECEIVER OF A WIRELESS COMMUNICATIONS SYSTEM 审中-公开
标题翻译：确定无线通信系统接收器中的频率错误
公开(公告)号：WO2008135541A1
公开(公告)日：2008-11-13
申请号：PCT/EP2008/055454
申请日：2008-05-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , LINDOFF, Bengt , NORDSTRÖM, Fredrik , WILHELMSSON, Leif
发明人： LINDOFF, Bengt , NORDSTRÖM, Fredrik , WILHELMSSON, Leif
IPC分类号： H04L27/26
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2675
摘要： A frequency error of received signals in an OFDM receiver of a wireless communications system is determined. Symbols of a given duration are transmitted as cells on sub-carrier frequencies; and some of the cells are pilot cells modulated with reference information. The method comprises the steps of selecting at least three pilot cells (p 0 , p 1 , p 2 ) from different symbols and different sub-carriers; determining the symbol and the sub-carrier on which each pilot cell is transmitted; determining for each pilot cell a phase difference between received and generated signals; calculating therefrom a change in phase difference (Φ x ) caused by the frequency error; and calculating the frequency error from the calculated change in phase difference (Φ x ). In this way a receiver capable of determining a frequency error also in situations where only a short data burst, such as a single resource block, is available for the estimation is provided.
摘要翻译：确定无线通信系统的OFDM接收机中的接收信号的频率误差。给定持续时间的符号作为小区在子载波频率上发送; 并且一些小区是用参考信息调制的导频小区。该方法包括以下步骤：从不同的符号和不同的子像素中选择至少三个导频小区（p 0，0，p 1，p 2，运营商; 确定发送每个导频小区的符号和子载波; 为每个导频小区确定接收和产生的信号之间的相位差; 由此计算由频率误差引起的相位差（F×x×）的变化; 以及根据所计算的相位差的变化（F x x S）计算频率误差。以这种方式，能够在只有短数据突发（例如单个资源块）可用于估计的情况下也能够确定频率误差的接收机被提供。

7. 发明申请

WO2002069556A1 METHOD AND APPARATUS FOR HANDLING TIME-DRIFT 审中-公开
标题翻译：处理时间的方法和装置
公开(公告)号：WO2002069556A1
公开(公告)日：2002-09-06
申请号：PCT/EP2002/002114
申请日：2002-02-27
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , PERSSON, Joakim , WILHELMSSON, Leif
发明人： PERSSON, Joakim , WILHELMSSON, Leif
IPC分类号： H04L7/04
CPC分类号： H04L1/0061 , H04L1/205 , H04L7/0083 , H04L7/048
摘要： A method for maintaining synchronization between a transmitter and a receiver is disclosed. The method offsets time drift which causes a degradation in the quality of communication between a transmitter and a reciver. The method comprises using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a portion of a received packet, switching to a second sampling time upon degradation in a reliability of the symbols, and using the second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a remaining portion of the received packet.
摘要翻译：公开了一种用于维持发射机和接收机之间的同步的方法。该方法抵消时间漂移，导致发射机和修剪器之间的通信质量下降。该方法包括使用第一采样时间来获得用于解码接收分组的一部分的内容的硬判决符号的第一序列，在符号的可靠性劣化时切换到第二采样时间，并且使用第二采样时间获得用于解码接收到的分组的剩余部分的内容的硬判决符号的第二序列。

8. 发明申请

WO2010092115A1 DATA PACKET COMMUNICATION SCHEDULING BASED ON THE REMAINING NUMBER OF RETRANSMISSIONS IN A COMMUNICATION DEVICE HAVING A PLURALITY OF TRANSCEIVER SYSTEMS 审中-公开
标题翻译：基于具有多个收发系统的通信设备中的剩余数量的数据包通信调度
公开(公告)号：WO2010092115A1
公开(公告)日：2010-08-19
申请号：PCT/EP2010/051710
申请日：2010-02-11
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , LINDOFF, Bengt , LØVENDAHL, Arild
发明人： WILHELMSSON, Leif , LINDOFF, Bengt , LØVENDAHL, Arild
IPC分类号： H04W72/12
CPC分类号： H04W72/1215 , H04W16/14
摘要： A communication device has a plurality of concurrently operating transceiver systems, each operating in a respectively different one of a plurality of communication systems. Operation of the transceiver systems is coordinated by receiving a plurality of requests from different ones of the transceiver systems, each of the requests being a request to access a communication medium for the purpose of transmitting or receiving a data packet. Utilization of an available time period is scheduled by selecting which one or ones of the requests to grant based, at least in part, on how many remaining times out of a maximum number of times each of the transmission systems' data packet is permitted to be retransmitted compared to other requests, on whether the requests are requests to transmit a data packet, and on whether the requests are requests to receive a data packet.
摘要翻译：通信设备具有多个同时操作的收发器系统，每个收发器系统分别在多个通信系统中的不同的一个中工作。通过从不同收发器系统接收多个请求来协调收发器系统的操作，每个请求是为了发送或接收数据分组的目的而访问通信介质的请求。调度可用时间段的利用是通过选择至少部分地基于允许传输系统的数据分组被允许的最大次数中剩余多少次来批准的请求中的哪一个或哪些与其他请求相比重传，关于请求是发送数据分组的请求，以及请求是否是请求接收数据分组。

9. 发明申请

WO2009074530A1 METHOD AND APPARATUS FOR POSITIONING AN FFT-WINDOW IN AN OFDM-RECEIVER 审中-公开
标题翻译：用于在OFDM接收机中定位FFT窗的方法和装置
公开(公告)号：WO2009074530A1
公开(公告)日：2009-06-18
申请号：PCT/EP2008/067000
申请日：2008-12-08
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , NORDSTRÖM, Fredrik , BJÖRKMAN, Lars
发明人： WILHELMSSON, Leif , NORDSTRÖM, Fredrik , BJÖRKMAN, Lars
IPC分类号： H04L27/26
CPC分类号： H04L27/2662 , H04L5/0007 , H04L25/0216 , H04L25/022 , H04L25/0232 , H04L27/2657 , H04L27/2665
摘要： Methods for positioning an FFT-window in an OFDM-receiver are disclosed as well as electronic apparatuses and computer program products for performing the methods. The method comprises determining a position of the FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal, using the position of the FFT-window to obtain a first OFDM-symbol from the received OFDM-signal, and applying an FFT to the first OFDM-symbol to produce an FFT-output signal. The method also comprises determining a frequency dependent phase rotation component of the FFT-output signal, and removing the determined frequency dependent phase rotation component from the FFT-output signal to obtain a compensated FFT-output signal. A delay spread estimate is calculated based on at least one of the FFT-output signal and the compensated FFT-output signal, and the position of the FFT-window is adjusted based on at least the determined frequency dependent phase rotation component and the calculated delay spread estimate.
摘要翻译：公开了在OFDM接收机中定位FFT窗口的方法以及用于执行方法的电子设备和计算机程序产品。该方法包括使用FFT窗口的位置从接收的OFDM信号中获得第一OFDM符号来确定FFT窗口相对于接收的OFDM信号的一个或多个OFDM符号的位置，以及对第一OFDM符号应用FFT以产生FFT输出信号。该方法还包括确定FFT输出信号的频率相关相位旋转分量，以及从FFT输出信号中去除所确定的频率相关相位旋转分量以获得经补偿的FFT输出信号。基于FFT输出信号和经补偿的FFT输出信号中的至少一个来计算延迟扩展估计，并且至少基于所确定的频率相关相位旋转分量和所计算的延迟来调整FFT窗口的位置传播估计。

10. 发明申请

WO2008128828A1 A METHOD AND A DEVICE FOR RECEIVING DATA IN A MOBILE COMMUNICATION DEVICE IN A BROADCAST SYSTEM 审中-公开
标题翻译：用于在广播系统中的移动通信设备中接收数据的方法和设备
公开(公告)号：WO2008128828A1
公开(公告)日：2008-10-30
申请号：PCT/EP2008/053024
申请日：2008-03-13
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , WILHELMSSON, Leif , PAMP, Johan
发明人： WILHELMSSON, Leif , PAMP, Johan
IPC分类号： H04L29/08
CPC分类号： H04H20/426 , H04L5/0007 , H04L5/0046 , H04L5/0058 , H04L67/04 , H04L67/325 , H04W52/0238 , H04W52/0261 , Y02D70/168 , Y02D70/22 , Y02D70/26
摘要： In a method for receiving data in a mobile communication device (103) in a broadcast system (100) in which an amount of data is transmitted; said mobile communication device (103) comprising a battery (104); wherein the method comprises the step of receiving a part of said amount of data, wherein the method further comprises the step of determining said part of said amount of data based on a charge state of the battery. In this way, the mobile communication device is able to download/receive an amount of data in dependence to an actual condition experienced by said mobile communication device. A condition of the mobile communication device may, in this context be, for example, a reception condition, a power consumption condition, a battery capacity condition, a battery charging condition, etc.
摘要翻译：一种用于在其中发送数据量的广播系统（100）中的移动通信设备（103）中接收数据的方法; 所述移动通信设备（103）包括电池（104）; 其中所述方法包括接收所述数据量的一部分的步骤，其中所述方法还包括基于所述电池的充电状态来确定所述数据量的所述部分的步骤。以这种方式，移动通信设备能够根据所述移动通信设备所经历的实际状况来下载/接收数据量。在这种情况下，移动通信设备的条件可以是例如接收条件，功耗条件，电池容量条件，电池充电条件等。

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