Siemens Aktiengesellschaft

Nokia Networks Oy

Nokia Oyj

Telekom Austria Aktiengesellschaft

Ernst Bonek

Klaus Hugl

Josef Rasinger

Juha Laurila

Arpad-Luwdig Scholtz

Arpad-Ludwig Scholtz

Josef Fuhl

Gerhard Schultes

A procedure for the semi-blind separation and detection of digital co-channel signals, whereby after a simultaneous spatial-temporal equalization, iterative projections of the symbol vectors to be detected, in a vector subspace or a symbol alphabet &OHgr; of finite size are initialized making use of a network user identifier ID . These projections are then used to adapt the symbol vectors S to the vector subspace and to the symbol alphabet &OHgr; of finite size, making use of the method of least squares algorithm but performing only matrix multiplications without eigenvalue or singular decompositions.

Iterative projection with initialization using a network user identifier

A beamforming method and device for adaptive antenna arrays including several antenna elements ( . to .M) in the downlink of frequency duplex systems, wherein antenna weights (W (f )) are determined for the antenna elements ( to .M) for downlink transmission on the basis of directional information of the uplink; in detail, the antenna weights (W (f )) for downlink transmission are determined on the basis of the power angle spectrum (APS ) of the uplink of the individual users (B to BK), wherein the power angle spectrum (APS ) is modified by masking out undesired regions.

Beamforming method and device

For each K subscriber of a cellular mobile radio network who is supplied with one and the same frequency and one and the same time slot a decision-feedback and therefore non-linear antenna pre-processing facility with a decision-feedback structure is used comprising forward filters backward filters and decision circuits for the adaptation of the antenna weighting factors, wherein the backward filters are adapted to the length of the processing window D of MLSE, and the output signals of the forward filters for the actual data detection are taken to the MLSE of the subscriber concerned, before the subtraction of the feedback component takes place. Each of the receiver structures similar to K can be adapted and operated independently from the other K-1 structures. A common vectorial MLSE for the common data detection of all K subscribers can be employed.

Process and device for the increase of subscriber capacity in a cellular mobile radio network

Process and device for converting digitally modulate high-frequency

Transmitting and/or receiving arrangement for portable appliances

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Vienna, Austria

Ernst Bonek