公开(公告)号：CA2314102A1

公开(公告)日：1999-06-24

申请号：CA2314102

申请日：1998-12-11

Applicant: ERICSSON TELEFON AB L M

Inventor： MAZUR SARA ,  FORSSEN ULF GORAN ,  GUDMUNDSON BJORN GUDMUND ,  KARLSSON JONAS

IPC: H04J13/04 ,  H04B7/08 ,  H04B7/26 ,  H04L1/06

Abstract: Mobile stations using antenna diversity are described. Techniques for combining CDMA signals received over plural antennas at a mobile unit are provided which suppress interference from undesired base stations.

公开(公告)号：GB2331682A

公开(公告)日：1999-05-26

申请号：GB9903530

申请日：1997-08-08

Applicant: ERICSSON TELEFON AB L M

Inventor： KARLSSON JONAS ,  TEDER PAUL ,  EWERBRING LARS-MAGNUS

IPC: H04B1/707 ,  H04J13/04

Abstract: A receiver device (703) downspreads signals from a band spreading signal, which generates downspread symbol sequences (803). A vector generator (704) generates symbol vectors (805) which include a symbol from each downspread symbol sequence (803). An auxiliary receiver (705) detects symbol vectors (805) in a first window (809) with the length of one symbol time. The auxiliary receiver (705) generates provisional estimates of the symbol vectors (805) with the help of a device with a first window algorithm (811). A delaying module (706) delays the symbol vectors (805) from the vector generator (704) by one symbol time before they reach a main receiver (707). The main receiver (707) detects in a second window (806) the symbol vectors (805) with the length of one symbol time. The main receiver (707) uses a device with a second window algorithm (808) in order to estimate the received symbol vectors (805) with reference taken to the previously estimated symbol vectors in the main receiver (705) and the provisional estimates of the symbol vectors (805) from the auxiliary receiver (705). A component generator (710) divides up the estimated symbol vectors (807) from the main receiver into separate components (815).

公开(公告)号：AU9562598A

公开(公告)日：1999-05-10

申请号：AU9562598

申请日：1998-10-09

Applicant: ERICSSON TELEFON AB L M

Inventor： KARLSSON JONAS ,  OVESJO FREDRIK

IPC: H04W64/00 ,  H04Q7/38 ,  H04Q7/22 ,  G01S5/12

Abstract: A system and method for improving the accuracy of a location estimation measurement within a telecommunication system is disclosed. During a cessation of transmissions by a local base transceiver system in communication with the mobile station, the mobile station communicates with other, more remote base transceiver systems and trilateration and other distance measuring techniques are employed to calculate the position of the mobile station in relation to those remote base transceiver systems. In another embodiment of the present invention, the local base transceiver system is also used to calculate the position. In still another embodiment, during a cessation of transmissions by the mobile stations in communication with a local base transceiver system, the local base transceiver system is better able to use remote mobile stations for trilateration.

公开(公告)号：CA2294224A1

公开(公告)日：1998-12-30

申请号：CA2294224

申请日：1998-05-26

Applicant: ERICSSON TELEFON AB L M

Inventor： LUNDSJOE JOHAN ,  KARLSSON JONAS ,  OVESJOE FREDRIK

IPC: H04B7/08 ,  H04B7/10 ,  H04B7/26 ,  H04W16/00 ,  H04W16/24 ,  H04Q7/36

Abstract: The present invention relates to sectorization of a cellular CDMA-system. Each sectorized cell (CELL) in the CDMA-system comprises a number of antenna sectors (AS1-AS8) having overlapping regions. Each cell is allocated a number of at least two different pilot channels (P1, P2). Two antenna sectors having a common overlapping region are not allowed to use the same pilot channel. At least one of said pilot channels (P1, P2) are reused within the cell, by at least two antenna sectors with no common overlapping region. The antenna sectors that use the same pilot signal are constituting a logical sector (LS1, LS2). A mobile station can communicate with the base station in a cell by using one or more antenna sectors within one or more logical sectors. If a mobile station communicates with the base station within a number of antenna sectors within the same logical sector, no softer handoff is required between the antenna sectors.

公开(公告)号：AU3872297A

公开(公告)日：1998-03-06

申请号：AU3872297

申请日：1997-08-08

Applicant: ERICSSON TELEFON AB L M

Inventor： KARLSSON JONAS ,  TEDER PAUL ,  EWERBRING LARS-MAGNUS

IPC: H04B1/707 ,  H04J13/04

Abstract: A receiver device (703) downspreads signals from a band spreading signal, which generates downspread symbol sequences (803). A vector generator (704) generate symbol vectors (805) which include a symbol from each downspread symbol sequence (803). An auxiliary receiver (705) detects symbol vectors (805) in a first window (809) with the length of one symbol time. The auxiliary receiver (705) generates provisional estimates of the symbol vectors (805) with the help of a device with a first window algorithm (811). A delaying module (706) delays the symbol vectors (805) from the vector generator (704) by one symbol time before they reach a main receiver (707). The main receiver (707) detects in a second window (806) the symbol vectors (805) with the length of one symbol time. The main receiver (707) uses a device with a second window algorithm (808) in order to estimate the received symbol vectors (805) with reference taken to the previously estimated symbol vectors in the main receiver (705) and the provisional estimates of the symbol vectors (805) from the auxiliary receiver (705). A component generator (710) divides up the estimated symbol vectors (807) from the main receiver into separate components (815).