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1. 发明申请

WO2007003979A1 METHOD AND ARRANGEMENT FOR ESTIMATING DC OFFSET 审中-公开
标题翻译：估计直流偏差的方法和布置
公开(公告)号：WO2007003979A1
公开(公告)日：2007-01-11
申请号：PCT/IB2005/001880
申请日：2005-07-01
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , HUI, Dennis , RAMESH, Rajaram
发明人： HUI, Dennis , RAMESH, Rajaram
IPC分类号： H04L25/06
CPC分类号： H04L25/063 , H04L25/061
摘要： A method and arrangement for estimating a DC offset for a signal received in a radio receiver. The received signal includes a digitally modulated signal component, a DC offset component, and a noise component. When the signal is of a known type, such as a Gaussian Minimum Shift Keying (GMSK)-modulated signal with constant amplitude in a GSM/EDGE cellular radio system, the method exploits the known characteristics of the statistical distribution for the known type of signal to obtain a better estimate of the DC offset. The statistical distribution of the received digitally modulated signal component is first analyzed. That statistical distribution is then compared to the known statistical distribution for the known type of signal to identify differences. The differences are then used to estimate the DC offset. Additional iterations may be performed to further improve the DC estimate.
摘要翻译：一种用于估计在无线电接收机中接收的信号的DC偏移的方法和装置。接收到的信号包括数字调制信号分量，DC偏移分量和噪声分量。当信号是GSM / EDGE蜂窝无线电系统中具有恒定振幅的已知类型的高斯最小移频键控（GMSK）调制信号时，该方法利用了已知类型信号的已知统计分布特征以获得对DC偏移的更好的估计。首先分析接收到的数字调制信号分量的统计分布。然后将统计分布与已知的信号类型的统计分布进行比较以识别差异。然后使用差异来估计DC偏移。可以执行另外的迭代以进一步改善DC估计。

2. 发明申请

WO2009081263A3 QUICK PAGING IN TELECOMMUNICATION SYSTEMS 审中-公开
公开(公告)号：WO2009081263A3
公开(公告)日：2009-07-02
申请号：PCT/IB2008/003550
申请日：2008-12-18
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , RAMESH, Rajaram , BALACHANDRAN, Kumar , KOORAPATY, Havish
发明人： RAMESH, Rajaram , BALACHANDRAN, Kumar , KOORAPATY, Havish
IPC分类号： H04W68/02
摘要： In an orthogonal frequency division multiple access communication system, unused frequency resources during a conventional preamble signal are used for a quick paging mechanism. A set of quick paging signals is sent over the unused frequency resources to signal one or more subscriber stations.

3. 发明申请

WO2009061403A3 UPLINK RADIO FRAMES APPORTIONED FOR PLURAL MULTIPLE ACCESS TECHNOLOGIES 审中-公开
公开(公告)号：WO2009061403A3
公开(公告)日：2009-05-14
申请号：PCT/US2008/012479
申请日：2008-11-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , BALACHANDRAN, Kumar , ERNSTROM, Per , KOORAPATY, Havish , RAMESH, Rajaram , THAKARE, Kiran
发明人： BALACHANDRAN, Kumar , ERNSTROM, Per , KOORAPATY, Havish , RAMESH, Rajaram , THAKARE, Kiran
IPC分类号： H04L27/28
摘要： Frames of information are communicated between a base station (28) of a radio access network (RAN) and plural types of wireless terminals (30). Frame handlers of the base station and of certain types of wireless terminals (30-2) process differing portions of the frame according to respective differing multiple access technologies. In differing embodiments and implementations, modulation techniques of the differing multiple access technologies can be apportioned to differing portions of the frame in various manners, such as (for example) to differing subframes of a multi- sub-framed frame or to differing burst fields or sections of an uplink (UL) burst.

4. 发明申请

WO2005125076A1 BENIGN INTERFERENCE SUPPRESSION FOR RECEIVED SIGNAL QUALITY ESTIMATION 审中-公开
标题翻译：接收信号质量估计的BENIGN干扰抑制
公开(公告)号：WO2005125076A1
公开(公告)日：2005-12-29
申请号：PCT/EP2005/006269
申请日：2005-06-10
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , BOTTOMLEY, Gregory , RAMESH, Rajaram , WANG, Yi-Pin, Eric
发明人： BOTTOMLEY, Gregory , RAMESH, Rajaram , WANG, Yi-Pin, Eric
IPC分类号： H04L1/20
CPC分类号： H04L1/20 , H04B2201/709727 , H04L1/0003 , H04L1/0026 , H04L1/206
摘要： A receiver circuit suppre ses effects of "benign" impairment from the calculation of received signal quality estimates, such that the estimate depends primarily on the effects of non-benign impairment. For example, a received signal may be subject to same-cell and other cell interference plus noise, which is generally modeled using a Gaussian distribution, and also may be due to certain forms of self-interference, such as quadrature phase interference arising from imperfect de-rotation of the pilot samples used to generate channel estimates for the received signal. Such interference generally takes on a distribution defined by the pilot signal modulation, e.g., a binomial distribution for binary phase shift keying modulation. Interference arising from such sources is relatively "benign" as compared to Gaussian interference and thus should be suppressed or otherwise discounted in signal quality calculations. Suppression may be based on subtracting benign impairment correlation estimates from total impairment correlation estimates, or on filtering the benign impairment in channel estimation.
摘要翻译：接收机电路可以从接收到的信号质量估计的计算中抑制“良性”损伤的影响，使得估计主要取决于非良性损伤的影响。例如，接收的信号可能经受相同小区和其他小区干扰加噪声，其通常使用高斯分布来建模，并且还可能是由于某些形式的自干扰，例如由不完美产生的正交相位干扰用于产生用于接收信号的信道估计的导频样本的去旋转。这种干扰通常采用由导频信号调制定义的分布，例如二进制相移键控调制的二项分布。与高斯干扰相比，从这些源产生的干扰相对“良性”，因此在信号质量计算中应被抑制或以其他方式折扣。抑制可以基于从总损伤相关性估计中减去良性损伤相关估计，或者在过滤信道估计中的良性损伤。

5. 发明申请

WO2009109842A2 QUICK PAGING RECEIVERS IN TELECOMMUNICATION SYSTEMS 审中-公开
标题翻译：电信系统中快速寻呼接收机
公开(公告)号：WO2009109842A2
公开(公告)日：2009-09-11
申请号：PCT/IB2009/000436
申请日：2009-03-04
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , RAMESH, Rajaram , BALACHANDRAN, Kumar , KOORAPATY, Havish
发明人： RAMESH, Rajaram , BALACHANDRAN, Kumar , KOORAPATY, Havish
IPC分类号： H04W68/02
CPC分类号： H04L25/03012 , H04L25/0232 , H04L27/2647 , H04W68/025
摘要： Methods and apparatus by which receiving stations or other communication network nodes can receive quick paging code words assigned by transmitting stations to the receiving stations. A receiving station can estimate the characteristics of the channel to the transmitting station based on a downlink-frame's preamble and use correlation to detect the presence of an assigned code word. The receiving station can suppress interference from other transmitting stations in the correlation operation based on the nature of the interference signal. When the receiving station knows an interfering signal from another transmitting station, the receiving station can subtract the interfering signal before carrying out the correlation operation.
摘要翻译：接收站或其他通信网络节点能够接收由发送站分配给接收站的快速寻呼码字的方法和装置。接收站可以基于下行链路帧的前导码来估计发送站的信道的特性，并使用相关性来检测分配的码字的存在。基于干扰信号的性质，接收站可以在相关操作中抑制来自其他发射站的干扰。当接收站知道来自另一发射台的干扰信号时，接收站可以在进行相关操作之前减去干扰信号。

6. 发明申请

WO2007021224A1 METHOD AND ARRANGEMENT FOR CHANNEL DECODING UTILIZING A PRIORI INFORMATION AND SOFT COMBINING 审中-公开
标题翻译：使用优先信息和软组合的信道解码的方法和布置
公开(公告)号：WO2007021224A1
公开(公告)日：2007-02-22
申请号：PCT/SE2005/001216
申请日：2005-08-16
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , KOORAPATY, Havish , RAMESH, Rajaram , BALACHANDRAN, Kumar
发明人： KOORAPATY, Havish , RAMESH, Rajaram , BALACHANDRAN, Kumar
IPC分类号： H03M13/39 , H03M13/45
CPC分类号： H03M13/3769 , H04L1/0045 , H04L1/0072 , H04L1/0075 , H04L1/08
摘要： A method and arrangement for improving channel decoding performance in a radio receiver. Data bits from previously decoded messages are analyzed to provide a priori information to a channel decoder (27), which is decoding a currently received message of the same type. The invention may analyze both the header and data fields of the previously decoded message frames to detect fields that are unchanging or rarely changing from one frame to the next. Probabilistic knowledge (a) of the bits in these unchanging or rarely changing fields is then used to improve the decoding performance for the current message (39). If a message cannot be successfully decoded, soft values of the bits are stored (46) and then soft-combined (48) with selected bits in the next message received prior to decoding. The invention is applicable to any type of message that has data components that are repeated with varying degrees of probability in successive transmissions.
摘要翻译：一种用于提高无线电接收机中的信道解码性能的方法和装置。分析来自先前解码的消息的数据比特，以将先验信息提供给频道解码器（27），该解码器解码当前接收到的相同类型的消息。本发明可以分析先前解码的消息帧的报头和数据字段，以检测不一致或很少从一帧改变到下一帧的场。然后使用这些不变或很少变化的字段中的比特的概率知识（a）来提高当前消息的解码性能（39）。如果消息无法被成功解码，则在解码之前，将比特的软值存储（46），然后与接收到的下一个消息中的所选位进行软组合（48）。本发明可应用于具有在连续传输中以不同程度的概率重复的数据分量的任何类型的消息。

7. 发明申请

WO2004073180A2 SYSTEM AND METHOD FOR INTERFERENCE CANCELLATION IN A WIRELSS COMMUNICATION RECEIVER 审中-公开
标题翻译：一种线路通信接收机干扰消除的系统和方法
公开(公告)号：WO2004073180A2
公开(公告)日：2004-08-26
申请号：PCT/US2004/003172
申请日：2004-02-03
申请人： ERICSSON INC. , HUI, Dennis , RAMESH, Rajaram
发明人： HUI, Dennis , RAMESH, Rajaram
IPC分类号： H04B
CPC分类号： H04L25/023 , H04L25/025 , H04L2025/03401 , H04L2025/03407
摘要： A communication receiver improves its channel estimation performance, its equalization performance, or both, by modeling the non-Gaussian characteristics of a dominant source of interference in a received signal. That is, rather than using Gaussian-based modeling, the receiver generates signal disturbance estimates using a probabilistic model representative of the non-Gaussian interference in a received signal, such as adjacent channel or co-channel signal interference in mobile station operating within a wireless communication network. The receiver may use such non-Gaussian interference modeling responsive to detecting such interference in the received signal and may match its disturbance model to the detected interference. Further, where signal disturbance is predominantly Gaussian in nature, the receiver may switch to a Gaussian disturbance model.
摘要翻译：通信接收机通过对接收信号中的主要干扰源的非高斯特性进行建模来提高其信道估计性能，均衡性能或两者。也就是说，接收机不是使用基于高斯的建模，而是使用代表接收信号中的非高斯干扰的概率模型来产生信号干扰估计，例如在无线电中操作的移动站中的相邻信道或同频道信号干扰通讯网络接收机可以响应于在接收到的信号中检测到这样的干扰而使用这种非高斯干扰建模，并且可以将其干扰模型与检测到的干扰相匹配。此外，在本质上信号干扰主要是高斯的情况下，接收机可以切换到高斯干扰模型。

8. 发明申请

WO2005050937A1 METHODS AND APPARATUS FOR PRE-FILTERING A SIGNAL TO INCREASE SIGNAL-TO-NOISE RATIO AND DECORRELATE NOISE 审中-公开
标题翻译：用于预先过滤信号以增加信号噪声和装饰噪声的方法和装置
公开(公告)号：WO2005050937A1
公开(公告)日：2005-06-02
申请号：PCT/US2004/038412
申请日：2004-11-16
申请人： TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL) , HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
发明人： HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
IPC分类号： H04L25/03
CPC分类号： H04L25/03133 , H04L2025/03605
摘要： To receive a signal from a multiple-input-multiple-output (MIMO) communication channel, initial channel taps are generated based on an impulse response estimate of the MIMO communication channel. The received signal is pre-filtered (350) using the initial channel taps to generate output channel taps and a corresponding output signal having an increased signal-to-noise ratio (SNR) and uncorrelated noise. The SNR is based on a ratio of the energy in a first subset of the output channel taps to the energy in a second subset of the output channel taps.
摘要翻译：为了从多输入多输出（MIMO）通信信道接收信号，基于MIMO通信信道的脉冲响应估计来生成初始信道抽头。使用初始信道抽头对接收到的信号进行预滤波（350），以产生输出信道抽头和具有增加的信噪比（SNR）和不相关噪声的相应输出信号。 SNR基于输出信道抽头的第一子集中的能量与输出信道抽头的第二子集中的能量的比率。

9. 发明申请

WO2007084046A1 BROADCAST-CENTRIC CELLULAR COMMUNICATION SYSTEM, METHOD, AND MOBILE STATION 审中-公开
标题翻译：广播中心蜂窝通信系统，方法和移动站
公开(公告)号：WO2007084046A1
公开(公告)日：2007-07-26
申请号：PCT/SE2006/050512
申请日：2006-11-28
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： RAMESH, Rajaram , ZANGI, Kambiz , BALACHANDRAN, Kumar
IPC分类号： H04Q7/38 , H04L27/26 , H04Q7/32
CPC分类号： H04W68/10 , H04B7/022
摘要： A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. The system constructs an identical paging signal at the plurality of base stations, and controls the base stations to simultaneously transmit the identical paging signal. A mobile station camps on a paging channel that is common to the plurality of base stations, and listens to paging messages being simultaneously broadcast by the plurality of base stations. The mobile station selects a base station having a suitable signal quality, and transmits to the selected base station, a response to a paging message addressed to the mobile station.
摘要翻译：以广播为中心的蜂窝通信系统通过利用具有在多个关联小区内发送信号的多个基站的蜂窝通信系统中的宏分集的益处来改善广播信道性能。该系统在多个基站处构造相同的寻呼信号，并且控制基站同时发送相同的寻呼信号。移动台驻留在多个基站共用的寻呼信道上，并且收听由多个基站同时广播的寻呼消息。移动站选择具有适当信号质量的基站，并向所选择的基站发送对寻址到移动台的寻呼消息的响应。

10. 发明申请

WO2006035292A2 PARAMETER ESTIMATE INITIALIZATION USING INTERPOLATION 审中-公开
标题翻译：使用插值的参数估计初始化
公开(公告)号：WO2006035292A2
公开(公告)日：2006-04-06
申请号：PCT/IB2005/002859
申请日：2005-09-27
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)
发明人： COZZO, Carmela , BOTTOMLEY, Gregory, E. , RAMESH, Rajaram
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/709727
摘要： A receiver is described herein that is capable of receiving and processing a radio signal and further capable of using interpolation to initialize receiver parameters when there is a change in at least one delay associated with the received radio signal or when there is at least one new correlator position. For instance, the receiver parameters that can be initialized include: (1) channel coefficients; (2) AFC parameters; (3) tracking parameters; (4) noise statistics (noise correlations); (5) signal statistics (channel coefficient correlations); (6) data statistics (despread values or chip samples); or (7) combining weights.
摘要翻译：本文描述了一种接收机，其能够接收和处理无线电信号，并且还能够在存在与所接收的无线电信号相关联的至少一个延迟中的变化时或者当存在至少一个新的相关器时使用内插来初始化接收机参数位置。例如，可以初始化的接收机参数包括：（1）信道系数; （2）AFC参数; （3）跟踪参数; （4）噪声统计（噪声相关）; （5）信号统计（信道系数相关）; （6）数据统计（去扩展值或芯片样本）; 或（7）组合权重。

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