Telefonaktiebolaget Lm Ericsson (publ)

Peter Pääkkönen

Miguel Berg

Chenguang Lu

Per-Erik Eriksson

Elmar Trojer

Adrien Comeau

Ulf Skärby

Leonard Lightstone

Garry Irvine

Andrzej Plotka

Jurek Dabrowski

François Cardinal

The disclosure relates to a method for controlling an uplink noise figure and gain in a distributed antenna system network comprising at least one intermediate radio unit and one or more remote radio heads connected via a respective link to the at least one intermediate radio unit. The method comprises: establishing a target noise figure, an adjusting, for each link between the one or more remote radio heads and the intermediate radio unit, attenuation such as to obtain the target noise figure for each remote radio head connected to the at least one intermediate radio unit. The disclosure also relates to corresponding distributed antenna system network, devices, computer programs, and computer program products.

Method and node for controlling an uplink noise figure and gain

Systems and methods for determining a location of a wireless device are disclosed. In one embodiment, a method of operation of a central processing node for a shared cell of a cellular communications network includes obtaining signal strength measurements for a signal received from a wireless device at multiple Reception/Transmission (R/T) points in the shared cell. The signal strength measurements are simultaneous signal strength measurements made on signal discrimination space resources in an uplink of the shared cell. Further, the signal discrimination space resources are matched to capabilities of power meters utilized to generate the signal strength measurements. The method further includes identifying one or more of the R/T points having the best signal strength measurements and estimating a location of the wireless device based on known locations of the identified R/T point(s).

Method, apparatuses and system for improved wireless device location in shared cells

Disclosed is a method performed by a base station system of a wireless communication network, for increasing signal quality of signals sent from a radio head (RH) to a radio unit (RU) over a metallic conductor. The base station system comprising a baseband unit (BBU), the RU, and the RH, and the RU is connected to the RH via the metallic conductor. The method comprises, at the RH: amplifying, by an amplification unit, a signal to be transmitted from the RH to the RU; changing the signal amplification level of the amplification unit; and transmitting the amplified signal to the RU. The method further comprises, at the RU: receiving the amplified signal and compensating, by a compensating unit capable of adapting its amplification level, for the change in signal amplification level performed at the RH such that the strength of the signal is transparent to the base station system.

Methods, base station system, radio unit and radio head of a wireless communication network, for increasing signal quality of signals sent from the radio head to the radio unit

A directional coupler for radio frequency application, comprising: an input () for receiving a radio frequency input signal; a port () for delivering a radio frequency output signal; a first elongated conductor (), suspended in air between two ground planes, for connecting the input () with the port (); the first conductor () comprising a sandwich structure with a first upper conductive strip (A), a first intermediate layer comprising a dielectric material and a first lower conductive strip (B); a second elongated conductor (), suspended in air between two ground planes, the second elongated conductor () comprising a sandwich structure with a second upper conductive strip (A), a second intermediate layer comprising a dielectric material and a second lower conductive strip (B); said first elongated conductor () and said second elongated conductor () being substantially parallel; said first upper and lower conductive strips and said second upper and lower conductive strips, respectively, having conductive interconnections ().

Directional coupler, antenna interface unit and radio base station having an antenna interface unit

Growing community of inventors

Stockholm, Sweden

Peter Pääkkönen