Telefonaktiebolaget Lm Ericsson (publ)

Soren Andersson

Ulf Goran Forssen

Sven Oscar Petersson

Fredrik Bengt Ovesjo

Carl Fredric Kornestedt

A method and a system for calibrating the reception and transmission of an antenna array for use in a cellular communication system is disclosed. The calibration of the reception of the antenna array is performed by injecting a single calibration signal into each of a number of receiving antenna sections, in parallel. The signals are collected after having passed receiving components that might have distorted the phase and amplitude. Correction factors are generated and applied to received signals. The calibration of the transmission of the antenna array is performed in a similar way. A single calibration signal is generated and injected into each of a number of transmitting antenna sections, one at a time. The signals are collected, one at a time, after having passed transmitting components that might have distorted the phase and amplitude. Correction factors are generated and applied to signals that are to be transmitted.

Antenna array calibration

A method, and associated apparatus, for determining cell relationships in a radio communication system, such as a cellular communication system. The cell relationships describe how communications in a cell are disturbed by communications in other cells. The cell relationships are used, for example, in frequency planning procedures and procedures by which to determine neighbor cell lists.

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Stockholm, Sweden

Soren Andersson