公开(公告)号：WO0199240A3

公开(公告)日：2002-04-04

申请号：PCT/SE0101300

申请日：2001-06-07

Applicant: ERICSSON TELEFON AB L M

Inventor： HAGERMAN BO ,  OESTMAN THOMAS ,  JOHANNISSON BJOERN

IPC: H01Q3/26 ,  H01Q21/24 ,  H01Q25/00 ,  H04B7/10 ,  H04W84/04 ,  H04W88/08 ,  H04Q7/36

CPC classification number: H01Q3/26 ,  H01Q21/24 ,  H01Q25/00 ,  H04B7/10 ,  H04W84/042 ,  H04W88/08

Abstract: A telecommunications system and method is disclosed for allowing a base station to simultaneously transmit signal in several beams (1, 2, 3, 4) of a multi-beam antenna configuration. Antenna pattern control is maintained by employing orthogonal polarization orientation for every other beam (1, 2, 3, 4). For example, the two orthogonal polarization directions can be approximately linear polarization slanted +/- 45 DEG . To be able to transmit simultaneously in an arbitrary combination of more than one beam (1, 2, 3, 4), the BS antenna array includes a separate feeder cable (30c, 30f) for each combination of beams (1, 2, 3, 4) corresponding to a particular polarization, from one feeder (30) per beam (1, 2, 3, 4) to one feeder (30) with all beams (1, 2, 3, 4) of that polarization.

Abstract translation: 公开了一种用于允许基站在多波束天线配置的若干波束（1,2,3,4）中同时传输信号的电信系统和方法。 通过对每个其他光束（1,2,3,4）采用正交偏振取向来维持天线图案控制。 例如，两个正交偏振方向可以是近似线性偏振斜率+/- 45°。 为了能够以多于一个的光束（1,2,3,4）的任意组合同时传输，BS天线阵列包括用于每个光束（1,2,3）的组合的单独馈线电缆（30c，30f） ，4）对应于特定偏振，从每个光束（1,2,3,4）的一个馈送器（30）到具有该偏振的所有光束（1,2,3,4）的一个馈送器（30）。

公开(公告)号：WO0131809A3

公开(公告)日：2002-02-14

申请号：PCT/SE0001885

申请日：2000-09-29

Applicant: ERICSSON TELEFON AB L M

Inventor： HAGERMAN BO ,  JANSSON BO ,  OESTMAN THOMAS

IPC: H04B7/005 ,  H04B7/04 ,  H04Q7/36

CPC classification number: H04W52/265 ,  H04B7/0408

Abstract: A radiocommunication method and system which facilitates half-rate communications as well as downlink power control and selective beam transmission is described. Data associated with two terminals is multiplexed into a single timeslot. A first terminal's data occupies a first portion of the timeslot, while the second terminal's data occupies a second portion of the timeslot. A synchronization/training field may separate the first and second portions of the timeslot. In this way, a base station can change the power level and/or direction of transmission of the different terminal's data even though that data is multiplexed together on the same timeslot.

Abstract translation: 描述了有助于半速率通信以及下行链路功率控制和选择性波束传输的无线电通信方法和系统。 与两个终端相关联的数据被复用到单个时隙中。 第一终端的数据占据时隙的第一部分，而第二终端的数据占据时隙的第二部分。 同步/训练场可以分离时隙的第一和第二部分。 以这种方式，即使该数据在同一时隙上被多路复用在一起，基站也可以改变不同终端数据的功率电平和/或发送方向。

公开(公告)号：DE60140084D1

公开(公告)日：2009-11-12

申请号：DE60140084

申请日：2001-05-11

Applicant: ERICSSON TELEFON AB L M

Inventor： OESTMAN THOMAS ,  FARONIUS CAROLA

IPC: H04B1/707

Abstract: The present invention is related to a Rake receiver (R 1 ) for receiving a radio signal and to a searcher (S 8 a, S 8 b) for estimating the delay profile of one or more radio links. The searcher includes means for estimating delay profiles in separate windows. The searcher is arranged for being switched into a single window mode or alternatively into a multiple window mode. In single window mode the delay profiles of separate radio links are estimated in the windows, while in multiple window mode two or more windows are allocated adjacent in time for estimating the delay profile of the same radio link. Thereby, the use of the resources of the searcher can be adapted to the radio environments in which the searcher will be used. The Rake receiver comprises fingers that are grouped into two sets. Within a set of fingers the propagation paths are time aligned. The output from the two set of fingers are time aligned and then combined.

公开(公告)号：DE60035051D1

公开(公告)日：2007-07-12

申请号：DE60035051

申请日：2000-07-04

Applicant: ERICSSON TELEFON AB L M

Inventor： UTTERBORN CEYLON ,  OESTMAN THOMAS ,  STOLT TOMAS

IPC: H04B7/005 ,  H01Q1/24 ,  H03F3/60 ,  H04B1/04 ,  H04B7/26

Abstract: The present invention is related to a terrestrial cellular radio communication network comprising at least a first base station (BS1) in which a common set of multi carrier power amplifiers (409-412) are used to amplify radio signals transmitted by the first base station (BS1) in different cells. The invention enables reductions in the total maximum output power the first base station (BS1) needs to support when downlink power control functions, such as power control or discontinuous transmission, and/or Adaptive Channel Allocation are applied in the cells served by the first base station (BS1).

公开(公告)号：CA2294768A1

公开(公告)日：1999-01-14

申请号：CA2294768

申请日：1998-06-16

Applicant: ERICSSON TELEFON AB L M

Inventor： OESTMAN THOMAS ,  HAGERMAN BO ,  MAZUR SARA

IPC: H04J3/00 ,  H04B1/04 ,  H04B7/005 ,  H04B7/10 ,  H04B7/26

Abstract: Power control apparatus (54) and an associated method for a transmitting station (32) operable in a TDMA communication system (30). The transmitting station includes transmitter branches (38) for communicating communication signal bursts during selected time slots (12). Communication signal bursts transmitted upon adjacent time slots partially overlap so that a receiving station (34) is able to extract information from a communication signal burst transmitted upon an adjacent time slot.

公开(公告)号：FI973200A0

公开(公告)日：1997-08-01

申请号：FI973200

申请日：1997-08-01

Applicant: ERICSSON TELEFON AB L M

Inventor： OESTMAN THOMAS ,  GUSTAFSSON MAGNUS ,  JAERLEHOLM ANDERS

IPC: H03G3/20 ,  H03G7/00 ,  H03G

Abstract: A device and method are provided for fully realizing the precision gained internally from a conventional digital signal processor by generating a feed forward automatic gain control (AGC) signal. The feed forward AGC bit is indicative of the output of the digital signal processor being multiplied by a gain factor when the output from the digital filter included in the digital signal processor is below a threshold value. When the feed forward AGC signal is received by an inphase and quadrature (I/Q)-to-(logR/ phi ) converter connected to the digital signal processor, a corresponding value is subtracted from the radius component of the signal calculated by the (I/Q)-to-(logR/ phi ) converter. Because conventional digital signal processors have 16 IO bits, the feed forward AGC signal allows an input signal with a dynamic range and precision exceeding 16 bits to be transferred from the digital signal processor without loosing performance. As a result, a digital signal processor with a fewer number of IO bits than is nominally required for the precision and dynamic range of the output signal is implemented.

公开(公告)号：CA2211094A1

公开(公告)日：1996-08-08

申请号：CA2211094

申请日：1996-01-30

Applicant: ERICSSON TELEFON AB L M

Inventor： OESTMAN THOMAS ,  GUSTAFSSON MAGNUS ,  JAERLEHOLM ANDERS

IPC: H03G3/20 ,  H03G7/00

Abstract: A device and method are provided for fully realizing the precision gained internally from a conventional digital signal processor (30) by generating a feed-forward automatic gain control (AGC) signal. The feed-forward AGC bit is indicative of the output of the digital signal processor being multiplied by a gain factor when the output from the digital filter (31, 32) included in the digital signal processor is below a threshold value. When the feed-forward AGC signal is received by an inphase and quadrature (I/Q)-to-(logR/) converter (50) connected to the digital signal processor, a corresponding value is subtracted from the radius component of the signal calculated by the (I/Q)-to- (logR/) converter. Because conventional digital signal processors have 16 IO bits, the feed-forward AGC signal allows an input signal with a dynamic range and precision exceeding 16 bits to be transferred from the digital signal processor without loosing performance. As a result, a digital signal processor with a fewer number of IO bits than is nominally required for the precision and dynamic range of the output signal is implemented.

公开(公告)号：DE60035051T2

公开(公告)日：2008-01-24

申请号：DE60035051

申请日：2000-07-04

Applicant: ERICSSON TELEFON AB L M

Inventor： UTTERBORN CEYLON ,  OESTMAN THOMAS ,  STOLT TOMAS

IPC: H04B7/005 ,  H01Q1/24 ,  H03F3/60 ,  H04B1/04 ,  H04B7/26

Abstract: The present invention is related to a terrestrial cellular radio communication network comprising at least a first base station (BS1) in which a common set of multi carrier power amplifiers (409-412) are used to amplify radio signals transmitted by the first base station (BS1) in different cells. The invention enables reductions in the total maximum output power the first base station (BS1) needs to support when downlink power control functions, such as power control or discontinuous transmission, and/or Adaptive Channel Allocation are applied in the cells served by the first base station (BS1).

公开(公告)号：DE69737932D1

公开(公告)日：2007-08-30

申请号：DE69737932

申请日：1997-05-27

Applicant: ERICSSON TELEFON AB L M

Inventor： FORSSEN ULF ,  OESTMAN THOMAS ,  BOTTOMLEY GREGORY E

IPC: H04B7/08 ,  H04L25/08 ,  H01Q3/26 ,  H03M13/23 ,  H04B7/02 ,  H04B7/10 ,  H04B7/26 ,  H04L1/06 ,  H04L25/03 ,  H04W16/28

Abstract: Recently, interference rejection combining techniques have been proposed which can increase significantly the performance of the uplink in C/I limited environments. Another interesting property of the IRC techniques is that their C/I performance does not degrade as the correlation between the received signals increases. This feature of IRC techniques is exploited in the present invention to allow for a reduced spacing between the antennas. According to another aspect of the present invention, the performance of the downlink is improved using beamforming techniques to "steer" base station transmissions toward a desired mobile station. In this way, the performance of the downlink is improved using beamforming techniques to a degree similar to that at which the uplink has been improved using IRC techniques. This allows the system designer to more fully exploit the variations in system design associated with improving the uplink performance.

公开(公告)号：DE69836623D1

公开(公告)日：2007-01-25

申请号：DE69836623

申请日：1998-01-09

Applicant: ERICSSON TELEFON AB L M

Inventor： HAGERMAN BO ,  FORSSEN ULF ,  OESTMAN THOMAS ,  MAHLER HANS

IPC: H01Q3/26 ,  H01Q25/00 ,  H04B7/26 ,  H04W16/28

Abstract: Directional beam generative apparatus, and an associated method, for a radio communication station forms directional antenna beam patterns for the communication of communication signals with remote communication stations operable in a TDMA communication system. Channels are allocated for effectuation of communications between the radio communication station and the remote stations responsive to indications of locations at which the remote communication stations are indicated to be positioned. Remote communication stations indicated to be positioned within a selected area are allocated to channels formed upon a single carrier.