公开(公告)号：WO2005081444A1

公开(公告)日：2005-09-01

申请号：PCT/US2005/003944

申请日：2005-01-28

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  KRASNY, Leonid ,  MOLNAR, Karl James ,  CHENG, Jung-fu ,  GRANT, Stephen James ,  WANG, Yi-Pin

Inventor： KRASNY, Leonid ,  MOLNAR, Karl James ,  CHENG, Jung-fu ,  GRANT, Stephen James ,  WANG, Yi-Pin

IPC: H04L1/06

CPC classification number: H04B7/0686 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/065 ,  H04B7/0689 ,  H04B7/0691 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/003 ,  H04L1/06

Abstract: An adaptive transmission scheme provides multiple levels of adaptation. At a first level, a selection is made between a limited feedback or open loop scheme and a rich feedback or closed loop scheme. At a second level of adaptation, a diversity mode is selected. Additional levels of adaptation could be employed.

Abstract translation: 自适应传输方案提供多级适配。 在第一级，在有限的反馈或开环方案和丰富的反馈或闭环方案之间进行选择。 在第二级适配时，选择分集模式。 可以采用额外的适应水平。

公开(公告)号：WO2005062653A1

公开(公告)日：2005-07-07

申请号：PCT/SE2004/001829

申请日：2004-12-06

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： KRASNY, Leonid ,  GRANT, Stephen ,  MOLNAR, Karl

IPC: H04Q7/38

CPC classification number: H04W72/1231 ,  H04B2201/709727 ,  H04L1/20 ,  H04L5/0044 ,  H04L5/006 ,  H04W52/16 ,  H04W52/226 ,  H04W52/325 ,  H04W52/367

Abstract: A base station schedules one of a plurality of mobile terminals based on an expected SIR of an effective traffic channel associated with a non-scheduled mobile terminal. The expected SIR is generated by computing the expected SIR of a hypothesized traffic channel with a pre-filter adapted to the non-scheduled mobile terminal that would result if the non-scheduled mobile terminal was scheduled. A base station then schedules transmissions to the plurality of mobile terminals based on the computed expected SIR. The expected SIR may be computed so as to compensate for mismatch between the hypothesized traffic channel and a pilot channel associated with the non-scheduled mobile terminal. Alternatively, the expected SIR may be directly computed based on an estimate of the pre-filter of the hypothesized traffic channel.

Abstract translation: 基站基于与非调度移动终端相关联的有效业务信道的期望SIR来调度多个移动终端中的一个。 通过利用适配于非调度移动终端的预滤波器来计算假设的业务信道的预期SIR来产生预期的SIR，如果非调度移动终端被调度，则将产生。 基站然后基于所计算的预期SIR调度到多个移动终端的传输。 可以计算期望的SIR，以补偿假设业务信道与与非调度移动终端相关联的导频信道之间的失配。 或者，可以基于假设的业务信道的前置过滤器的估计来直接计算预期的SIR。

公开(公告)号：WO2005055457A1

公开(公告)日：2005-06-16

申请号：PCT/US2004/038030

申请日：2004-11-12

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  FULGHAM, Tracy, L. ,  BOTTOMLEY, Gregory, Edward ,  WANG, Yi-Pin, Eric ,  KHAYRALLAH, Ali, S.

Inventor： FULGHAM, Tracy, L. ,  BOTTOMLEY, Gregory, Edward ,  WANG, Yi-Pin, Eric ,  KHAYRALLAH, Ali, S.

IPC: H04B1/707

CPC classification number: H04B1/7107 ,  H04B1/712 ,  H04B2201/709727 ,  H04J13/0048

Abstract: Interference, such as inter-symbol interference, from a symbol of interest in a RAKE receiver (200) is reduced. The RAKE receiver comprises a plurality of RAKE fingers (220), a processor (230), and a combiner (232). The plurality of RAKE fingers despread symbols received over multiple paths of a multi-path channel. The processor determines cross-correlations between symbol waveforms from different symbols and multiple paths. The combiner combines the despread symbols using the cross-correlations to reduce interference from the symbol of interest.

Abstract translation: 来自RAKE接收机（200）中感兴趣的符号的干扰（例如符号间干扰）被减少。 RAKE接收机包括多个RAKE指（220），处理器（230）和组合器（232）。 多个RAKE手指解扩在多路径信道的多个路径上接收的符号。 处理器确定来自不同符号和多个路径的符号波形之间的互相关。 组合器使用互相关组合解扩符号，以减少来自感兴趣符号的干扰。

公开(公告)号：WO2005036849A1

公开(公告)日：2005-04-21

申请号：PCT/US2004/021686

申请日：2004-07-06

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WANG, Yi-Pin Eric

Inventor： WANG, Yi-Pin Eric

IPC: H04L27/38

CPC classification number: H04B1/712 ,  H04B2201/709727 ,  H04L25/0226 ,  H04L27/3809

Abstract: An exemplary receiver demodulates an amplitude modulated data signal received in association with a reference signal, wherein a transmit power of the data signal is unknown to the receiver circuit, by determining a scaling factor based on the reference and data signals. Thus, an exemplary receiver estimates scaling factors indicative of the received amplitude of a data channel signal that is transmitted at a power different from that of the reference channel being used to estimate the radio channel properties. The scaling factor may be used to correct the amplitude of information symbols recovered from a received data signal such that they are moved closer in amplitude to intended points within an amplitude modulation constellation and/or to scale nominal points in a reference constellation used in demodulating the received symbols.

Abstract translation: 示例性接收机解调与参考信号相关联接收的幅度调制数据信号，其中通过基于参考和数据信号确定缩放因子，数据信号的发射功率对于接收机电路是未知的。 因此，示例性接收机估计指示以与用于估计无线电信道属性的参考信道不同的功率发送的数据信道信号的接收幅度的缩放因子。 缩放因子可以用于校正从接收的数据信号恢复的信号符号的幅度，使得它们在幅度上移动到幅度调制星座图中的预期点更接近，和/或缩放用于解调所述信号的参考星座中的标称点 收到的符号。

公开(公告)号：WO2005004430A1

公开(公告)日：2005-01-13

申请号：PCT/EP2004/005987

申请日：2004-06-03

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  MALM, Peter ,  LINDOFF, Bengt ,  CEDERGREN, Andreas

Inventor： MALM, Peter ,  LINDOFF, Bengt ,  CEDERGREN, Andreas

IPC: H04L27/38

CPC classification number: H04L25/061 ,  H04B2201/709727 ,  H04L27/3809

Abstract: A method and system are described for performing fast and simple M-QAM detection on received signals, such as a 16-QAM signal, by estimating decision boundaries. Amplitude information is collected for in-phase an quadrature phase components of the received signal over a number of symbols. Average of the absolute value of the amplitude information of the in-phase components and of the quadrature phase components are determined over the number of symbols. The determined average absolute values of the in-phase and quadrature phase components provide a reference to produce the decision boundary estimates. estimates based on the estimated signal-to-interference ration (“SIR”) of the received signal to produce bias corrected decision boundary estimates.

Abstract translation: 描述了一种方法和系统，用于通过估计决策边界来对接收信号（例如16-QAM信号）执行快速和简单的M-QAM检测。 通过多个符号收集幅度信息用于同步接收信号的正交相位分量。 通过符号数来确定同相分量和正交相位分量的振幅信息的绝对值的平均值。 确定的同相和正交相位分量的平均绝对值提供了产生决策边界估计的参考。 基于估计的接收信号的信号干扰比（“SIR”）估计，以产生偏置校正的判定边界估计。

公开(公告)号：WO02052743A9

公开(公告)日：2004-08-05

申请号：PCT/US0149268

申请日：2001-12-18

Applicant: ERICSSON INC ,  WANG YI-PIN ERIC ,  BOTTOMLEY GREGORY EDWARD ,  URABE KENZO

Inventor： WANG YI-PIN ERIC ,  BOTTOMLEY GREGORY EDWARD ,  URABE KENZO

IPC: H04B1/7117 ,  H04B1/712 ,  H04B1/707

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/709727

Abstract: Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.

Abstract translation: 提供了恢复在通信介质中根据扩展序列发送的扩频信号中编码的信息的方法，其中从通信介质接收扩频信号并与扩展序列相关联以产生多个时间偏移相关。 这些时间偏移相关中的一些可被设计为消除已知的干扰信号。 然后可以选择多个时间偏移的子集，然后可以使用加权组合来组合对应的业务相关性，以估计在所发送的扩展频谱信号中编码的信息。 还提供了实现这些方法的接收器。

公开(公告)号：WO2003015306A1

公开(公告)日：2003-02-20

申请号：PCT/US2002/024705

申请日：2002-08-06

Applicant: ERICSSON INC. ,  DAHLMAN, Erik ,  WANG, Yi-Pin, Eric ,  DENT, Paul, Wilkinson ,  BOTTOMLEY, Gregory, Edward ,  KHAYRALLAH, Ali, S. ,  OSTBERG, Christer

Inventor： DAHLMAN, Erik ,  WANG, Yi-Pin, Eric ,  DENT, Paul, Wilkinson ,  BOTTOMLEY, Gregory, Edward ,  KHAYRALLAH, Ali, S. ,  OSTBERG, Christer

IPC: H04B1/707

CPC classification number: H04B1/7115 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/712 ,  H04B2201/7071 ,  H04B2201/709727

Abstract: A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.

Abstract translation: 通过在第一多个相关时间将扩展频谱信号与扩频序列相关来处理扩展频谱信号，以产生第一多个时间偏移相关。 处理第一多个时间偏移相关以产生符号的第一符号表示。 确定第一个符号表示的第一个质量。 响应于确定的第一质量，确定是否进一步处理第一符号表示或处理从扩频信号产生的符号的第二符号表示。 可以例如通过对第一符号表示进行解码以产生诸如CRC结果的解码度量或错误检查指示符来确定第一质量。 符号表示可以以串行方式或并行方式生成和/或评估质量。

公开(公告)号：WO01029982A1

公开(公告)日：2001-04-26

申请号：PCT/US2000/023297

申请日：2000-08-24

IPC: H04B1/709 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04Q7/38 ,  H04B1/707

CPC classification number: H04B1/712 ,  H04B1/709 ,  H04B1/7117 ,  H04B2201/709727

Abstract: Correlation times for a RAKE receiver are determined from time differentials between multipath components of a received signal based on correlation metrics, preferably signal strength measurements, associated with the multipath components. According to various embodiments of the present invention, selection strategies are employed in which "desired signal collecting" and "interference collecting" correlation times may be selected using average optimal (AO) or instantaneous optimal (IO) selection criteria. These criteria may include, for example, thresholds for signal strengths associated with multipath components of a signal at the correlation times, where the signal strengths may include absolute or relative measures of signal power or signal to noise ratio. According to alternative embodiments, correlation times are selected using an inverse filter of an estimated channel response. Related apparatus is also described.

Abstract translation: 基于与多路径分量相关联的相关度量，优选信号强度测量，从接收信号的多径分量之间的时间差确定RAKE接收机的相关时间。 根据本发明的各种实施例，采用选择策略，其中可以使用平均最优（AO）或瞬时最优（IO）选择标准来选择“期望的信号收集”和“干扰收集”相关时间。 这些标准可以包括例如与在相关时间的信号的多径分量相关联的信号强度的阈值，其中信号强度可以包括信号功率或信噪比的绝对或相对测量。 根据替代实施例，使用估计的信道响应的逆滤波器来选择相关时间。 还描述了相关装置。

公开(公告)号：WO00016494A1

公开(公告)日：2000-03-23

申请号：PCT/FI1999/000749

申请日：1999-09-14

IPC: H04B1/707 ,  H04B7/08 ,  H04B1/69

CPC classification number: H04B1/712 ,  H04B1/7115 ,  H04B7/0857 ,  H04B2201/709727

Abstract: The invention relates to a RAKE receiver of a CDMA system using IRC, the receiver receiving a radio signal by using at least two antenna branches (232A, 232B). In accordance with the invention, a RAKE finger (270A, 270B) comprises: a weighting coefficient part (272) for forming weighting coefficients maximizing the Signal-to-Interference-and-Noise Ratio (SINR) for each antenna branch (232A, 232B); a multiplier (284A, 284B) for multiplying a pilot part (274A), despread by a despreader (276A, 276B) in each antenna branch (232A, 232B), by a weighting coefficient; a multiplier (284C, 284D) for multiplying a data part (274B), despread by a despreader (276C, 276D) in each antenna branch (232A, 232B), by a weighting coefficient; an antenna branch summer (278A) for combining the despread pilot parts (274A), received via the separate antenna branches (232A, 232B) and multiplied by the weighting coefficient, to one pilot signal; an antenna branch summer (278B) for combining the despread data parts (274B), received via the separate antenna branches (232A, 232B) and multiplied by the weighting coefficient, to one data signal. In addition, the receiver comprises a RAKE finger summer (280B) for combining the data signals of the RAKE fingers (270A, 270B) operating by different delays to a sum data signal representing the received bits.

Abstract translation: 本发明涉及使用IRC的CDMA系统的RAKE接收机，该接收机通过使用至少两个天线分支（232A，232B）接收无线电信号。 根据本发明，RAKE指（270A，270B）包括：加权系数部分（272），用于形成每个天线分支（232A，232B）的信号与干扰和噪声比（SINR）最大的加权系数 ）; 用于将由每个天线分支（232A，232B）中的解扩器（276A，276B）进行解扩的导频部分（274A）乘以加权系数的乘法器（284A，284B） 用于将由每个天线分支（232A，232B）中的解扩器（276C，276D）解扩的数据部分（274B）乘以加权系数的乘法器（284C，284D） 天线分支加法器（278A），用于将通过分离的天线分支（232A，232B）接收并乘以加权系数的解扩导频部分（274A）组合成一个导频信号; 用于将经由分离的天线分支（232A，232B）接收并乘以加权系数的解扩数据部分（274B）组合到一个数据信号的天线分支加法器（278B）。 此外，接收机包括用于将由不同延迟操作的RAKE指（270A，270B）的数据信号组合到表示所接收的比特的和数据信号的RAKE拨号加法器（280B）。

公开(公告)号：WO1997032413A1

公开(公告)日：1997-09-04

申请号：PCT/US1997002615

申请日：1997-02-20

Applicant: ERICSSON INC.

Inventor： ERICSSON INC. ,  DENT, Paul, W.

IPC: H04J13/02

CPC classification number: H04J13/00 ,  H04B1/56 ,  H04B7/2618 ,  H04B2201/709727

Abstract: A multiple access communications system and method using Code Division Multiple Access (CDMA) and Time Division Multiple Access (TDMA) comprises coding information signals with CDMA codewords to be transmitted over a common frequency spectrum, time compressing the CDMA codewords for transmission only during allocated timeslots, activating a receiver only during the allocated timeslots to receive and decompress the time compressed CDMA codewords, and decoding the decompressed CDMA codewords to recover the information signals.

Abstract translation: 使用码分多址（CDMA）和时分多址（TDMA）的多址通信系统和方法包括使用将在公共频谱上发送的CDMA码字对信息信号进行编码，仅在分配的时隙期间对CDMA码字进行时间压缩以进行传输 仅在所分配的时隙期间激活接收机，以接收和解压缩时间压缩的CDMA码字，以及对解压缩的CDMA码字进行解码以恢复信息信号。