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    • 3. 发明申请
    • IMPROVED PREFILTERING IN MIMO RECEIVER
    • MIMO接收机中改进的预倾斜
    • WO2014046584A1
    • 2014-03-27
    • PCT/SE2012/051005
    • 2012-09-24
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • SAHLIN, HenrikLOPEZ, Miguel
    • H04B7/04H04B7/08
    • H04B7/0854H04B7/0413H04B7/0456H04L1/0052H04L1/0054H04L25/0204H04L25/0212H04L25/0226H04L25/024H04L25/03993
    • Data signals transmitted by a plurality of transmitting antennas over a radio channel are demodulated. The method comprises receiving (202) on a plurality of receiving antennas, a first data signal, a reference signal and a second data signal, the contents of the reference signal being known a priori to the receiver. The contents of the reference signal are used for calculating (204) an estimated polynomial channel matrix and a time reversed version of the same. Polynomial pre-filter matrices are calculated (206, 208) by a decomposition of the estimated polynomial channel matrices into a respective product of a paraunitary polynomial matrix and an upper triangular polynomial matrix with minimum phase filters on its main diagonal, where the polynomial pre-filter matrices are obtained by calculating the paraconjugate of the paraunitary polynomial matrices. The received data signals are demodulated (212) where the received data signals are multiplied with the calculated polynomial pre-filter matrices.
    • 由无线电信道上的多个发送天线发送的数据信号被解调。 该方法包括在多个接收天线上接收(202)第一数据信号,参考信号和第二数据信号,参考信号的内容先于接收机已知。 参考信号的内容用于计算(204)估计的多项式信道矩阵及其相反的时间反转版本。 通过将估计的多项式信道矩阵分解为在其主对角线上具有最小相位滤波器的超幺多项式矩阵和上三角多项式矩阵的相应乘积,来计算多项式预滤波器矩阵(206,208),其中多项式预滤波器矩阵 滤波器矩阵是通过计算超幺正多项式矩阵的附属函数获得的。 所接收的数据信号被解调(212),其中接收的数据信号与计算的多项式预滤波器矩阵相乘。
    • 5. 发明申请
    • PRECODING FOR MIMO
    • MIMO的预编码
    • WO2014031057A1
    • 2014-02-27
    • PCT/SE2013/050697
    • 2013-06-14
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • LOPEZ, MiguelNORDSTRÖM, EricSUNDBERG, MårtenSAHLIN, Henrik
    • H04B7/06H04B7/08
    • H04B7/0473H04B7/0456H04B7/0486H04B7/0639H04B7/0684H04B7/0851H04B7/2656
    • The embodiments herein relate to a method in a transmitter (101) for transmitting at least a first data burst and a second data burst to a receiver (105) in a system (100) applying applies closed loop codebook-based precoding MIMO. The transmitter (101) comprises at least a first Tx antenna (107a) and a second Tx antenna (107b). The transmitter (101) transmits, to the receiver (105), at least the first data burst through the first Tx antenna (107a) and the second data burst through the second Tx antenna (107b). The first data burst comprises a first training sequence and the second data burst comprises a second training sequence when the first data burst and the second data burst are non-precoded. The first data burst comprises a third training sequence and the second data burst comprises a fourth training sequence when the first data burst and the second data burst are precoded.
    • 本文的实施例涉及用于将应用基于闭环码本的预编码MIMO应用于系统(100)中的至少第一数据脉冲串和第二数据脉冲串发射到接收机(105)的发射机(101)中的方法。 发射机(101)至少包括第一Tx天线(107a)和第二Tx天线(107b)。 发送器(101)通过第一Tx天线(107a)和第二数据突发通过第二Tx天线(107b)向接收机(105)发送至少第一数据脉冲串。 第一数据脉冲串包括第一训练序列,并且当第一数据脉冲串和第二数据脉冲串未被预编码时,第二数据脉冲串包括第二训练序列。 第一数据脉冲串包括第三训练序列,并且当第一数据脉冲串和第二数据脉冲串被预编码时,第二数据脉冲串包括第四训练序列。
    • 6. 发明申请
    • MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT RADIO COMMUNICATIONS
    • 多用户多输入多输出无线电通信
    • WO2014027943A2
    • 2014-02-20
    • PCT/SE2013/050715
    • 2013-06-18
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • LOPEZ, MiguelSUNDBERG, MårtenLIBERG, Olof
    • H04B7/04H04L27/18H04L27/34
    • H04B7/0452H04L27/18H04L27/3461H04W72/048
    • A radio base station and method are provided for use in a radio communications system that conducts radio communications over a radio interface using basic physical channels. Each basic physical channel defines a time slot and a radio frequency for transmission. Radio communication is established between a radio base station and multiple user equipments (UEs) over the same basic physical channel. Subchannels are provided in the same basic physical channel to simultaneously support three or four full rate UE communications, seven or eight half rate UE communications, or other combinations. A first baseband transmitter chain is configured so that it can map full rate data corresponding to first and second full rate UE communications (or equivalent) as adaptive quadrature phase shift keying, AQPSK. A second baseband transmitter chain is configured so that it can map full rate data corresponding to a third and/or fourth full rate UE communication (or equivalent) as phase shifted signals onto a third of the three subchannels.
    • 提供无线电基站和方法用于通过无线电接口使用基本物理信道进行无线电通信的无线电通信系统。 每个基本物理信道定义一个时隙和一个射频用于传输。 在无线基站和多个用户设备(UE)之间通过相同的基本物理信道建立无线电通信。 在相同的基本物理信道中提供子信道以同时支持三或四个全速率UE通信,七个或八个半速率UE通信或其他组合。 配置第一基带发射机链,使得其可以将对应于第一和第二全速率UE通信(或等效)的全速率数据映射为自适应正交相移键控AQPSK。 第二基带发射机链被配置为使得它可以将对应于第三和/或第四全速率UE通信(或等同物)的全速率数据映射为相移信号到三个子信道中的三分之一。
    • 7. 发明申请
    • PREFILTERING IN MIMO RECEIVER
    • MIMO接收机中的预处理
    • WO2013191597A1
    • 2013-12-27
    • PCT/SE2012/050670
    • 2012-06-18
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)SAHLIN, HenrikLOPEZ, Miguel
    • SAHLIN, HenrikLOPEZ, Miguel
    • H04B7/04H04B7/08
    • H04B1/40H04B7/0413H04L25/0204H04L25/0228H04L25/0242H04L25/0246H04L25/03H04L25/03891H04L2025/03426
    • Data signals transmitted by a plurality of transmitting antennas over a radio channel are demodulated. The method comprises receiving (202) on a plurality of receiving antennas, a data signal and a reference signal, the contents of the reference signal being known a priori to the receiver. The contents of the reference signal are used for calculating (204) an estimated polynomial channel matrix. A polynomial pre-filter matrix is calculated (206, 208) by a decomposition of the estimated polynomial channel matrix into a product of a paraunitary polynomial matrix and an upper triangular polynomial matrix with minimum phase filters on its main diagonal, where the polynomial pre-filter matrix is obtained by calculating the paraconjugate of the paraunitary polynomial matrix. The received data signal is demodulated (212) where the received data signal is multiplied with the calculated polynomial pre-filter matrix.
    • 由无线电信道上的多个发送天线发送的数据信号被解调。 该方法包括在多个接收天线上接收(202)数据信号和参考信号,参考信号的内容先于接收机已知。 参考信号的内容用于计算(204)估计的多项式信道矩阵。 通过将估计的多项式信道矩阵分解为在其主对角线上具有最小相位滤波器的超幺多项式矩阵和上三角多项式矩阵的乘积来计算多项式预滤波器矩阵(206,208),其中多项式预滤波器矩阵 滤波矩阵是通过计算超幺正多项式矩阵的附属函数得到的。 接收的数据信号被解调(212),其中所接收的数据信号与计算的多项式预滤波器矩阵相乘。
    • 9. 发明申请
    • A RECEIVER FOR VOICE SERVICES OVER ADAPTIVE MULTI-USER CHANNELS ON ONE SLOT
    • 一个接收器,用于在一个插槽上进行自适应多用户通道的语音服务
    • WO2010074631A1
    • 2010-07-01
    • PCT/SE2009/050802
    • 2009-06-24
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)LOPEZ, Miguel
    • LOPEZ, Miguel
    • H04L25/03
    • H04L25/03006H04L2025/03426
    • A receiver, in particular a VAMOS receiver, is provided. The receiver is adapted to split the complex-valued baseband signal into its real and imaginary parts. The two branch system thus created is modeled as a real-valued Multiple Input Multiple Output, MIMO, system. The receiver is further adapted to use correlations of the noise, both in time and between branches of a channel to suppress the noise for multi-users in the same channel. In accordance with one embodiment the receiver is adapted to take into account the known symmetries present in a symbol constellation when more than one user exists in the same channel. This is for example the case in adaptive symbol constellation such as an adaptive alpha - QPSK constellation. Using the receiver in accordance with the above can provide the same performance as a joint detection receiver in the presence of Gaussian white noise, while giving better interference suppression than either SAIC or joint detection in the presence of GMSK modulated interference.
    • 提供接收机,特别是VAMOS接收机。 接收机适于将复值基带信号分解成其实部和虚部。 由此创建的两个分支系统被建模为实数多输入多输出MIMO系统。 接收机还适于在时间上和频道的分支之间使用噪声的相关性,以抑制同一信道中多用户的噪声。 根据一个实施例,当多个用户存在于同一信道中时,接收机适于考虑存在于符号星座中的已知对称性。 这是例如自适应符号星座的情况,例如自适应α-QPSK星座。 在存在高斯白噪声的情况下,使用接收机可以提供与联合检测接收机相同的性能,同时在存在GMSK调制干扰的同时给出比SAIC或联合检测更好的干扰抑制。
    • 10. 发明申请
    • FREQUENCY HOPPING OFFSETTING FOR MULTIPLE USERS REUSING ONE SLOT (MUROS)
    • 多用户反复使用一个SLOT(MUROS)频率偏移
    • WO2009136833A1
    • 2009-11-12
    • PCT/SE2009/000193
    • 2009-04-17
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)ERIKSSON, StefanSUNDBERG, MartenLOPEZ, Miguel
    • ERIKSSON, StefanSUNDBERG, MartenLOPEZ, Miguel
    • H04B1/713
    • H04B1/7143
    • First and second groups of mobile terminal communications in a cell are defined. A basic frequency hopping sequence for both groups is identified. An offset from the basic hopping sequence is determined for each mobile terminal communication in the first and second groups and is used along with the basic frequency hopping sequence to generate an assigned frequency hopping sequence for each mobile terminal. Some of the assigned frequency hopping sequences overlap such that a first communication from the first group and a second communication from the second group simultaneously use the same time-frequency radio resource during one hop in their corresponding assigned frequency hopping sequences. The first and second mobile terminal communications use a different time-frequency radio resource during another hop in their respective assigned frequency hopping sequence thereby varying the offset for each mobile terminal communication in the second group to improve interference diversity between the two groups for each hop.
    • 定义了小区中的第一和第二组移动终端通信。 识别两组的基本跳频序列。 对于第一和第二组中的每个移动终端通信确定与基本跳频序列的偏移量,并且与基本跳频序列一起使用以为每个移动终端生成分配的跳频序列。 一些分配的跳频序列重叠,使得来自第一组的第一通信和来自第二组的第二通信在其相应的分配的跳频序列中的一跳期间同时使用相同的时频无线电资源。 第一和第二移动终端通信在其各自分配的跳频序列中的另一跳期间使用不同的时频无线电资源,从而改变第二组中的每个移动终端通信的偏移,以改善每个跳的两组之间的干扰分集。