Deltanode Solutions Aktiebolag

Allgon Ab

Bird Technologies Group, Inc.

Deltanode Solutions Ab

Daniel Kerek

Peter Lidberg

An amplifier circuit including an amplifying stage and a predistortion stage is disclosed. The amplifier circuit outputs an output signal X. The predistortion stage is arranged for providing a predistortion signal Xto be added to an input signal Xof the amplifier circuit in order to compensate for non-linearites of said amplifying stage. According to the present invention, the amplifier circuit includes a working point unit arranged for determining a suitable working point WPto be used for said amplifying stage based on said predistortion signal X, and for adjusting an actual working point WPbeing used by said amplifying stage towards said suitable working point WP.

Amplifying stage working point determination

A first and a second interconnection unit comprising a respective first and a second communication interface, a first and a second electro-optical converter, and a multiplexing unit, is disclosed. The first interconnection unit is adapted to receive electrically transmitted analog and digital information, convert said information into electrically transmitted information, and to multiplex the information so as to enable transmission over a bidirectional link. The second interconnection unit is adapted to receive and de-multiplex the transmitted analog and digital information, to convert it back into electrically transmitted analog and digital information, and to output said information. A system comprising the first and second interconnection units is also disclosed. The system is adapted for supplying both analog services and digital services with communication information over the bidirectional link.

Communication system for analog and digital communication services

A Distributed Antenna System (DAS) including a distribution network is disclosed. The DAS is arranged for providing signaling between a Remote Unit Controller (RUC) and at least one active Remote Unit (RU) of said DAS, wherein said RUC is connected to a core network and is arranged for providing RF signals to said DAS. A first part of a spectrum of said signaling is allocated for transmission of at least one RF link to and from said at least one active RU. The present invention is characterized in that at least one second part of said spectrum, being separate from said first part, is allocated for transmission of at least one digital link for supplying digital communication signals for one or more of: at least one Remote Radio Head (RRH) unit, at least one Wireless Local Area Network (WLAN) unit, at least one pico base station, at least one femto base station, and at least one Ethernet unit.

Distribution network for a distributed antenna system

A method and device for determining the stability margin of a RF repeater. The method is carried out in two steps, viz. establishing the amplification of the repeater as a function of the frequency in a frequency band, and observing the magnitude of wave-like variations in the established frequency response, this magnitude constituting a measure of the stability margin such that an increasing magnitude corresponds to a decreasing stability margin.

Growing community of inventors

Danderyd, Sweden

Daniel Kerek