Nokia Corporation

Nokia Siemens Networks Oy

Petri Komulainen

Markku J Heikkila

Juha Pekka Karjalainen

Antti Tölli

Risto Timisjärvi

Harri Pennanen

There is provided a solution for improving the efficiency of a mobile communication network applying a distributed antenna system. The solution includes avoiding inter-cell interference with only a limited amount of backhaul information exchange between the base stations of the distributed antenna system, and applying beamforming techniques according to determined user allocation.

Interference avoidance in mobile communication network employing distributed antenna system

Control of receiver antenna diversity is described in relation to apparatuses, user radio terminals, a method, and a computer program. The apparatus comprises an interface configured to obtain information on a power control procedure of a radio receiver and a processing unit configured to switch on/off a receiver antenna diversity branch of the radio receiver on the basis of a comparison between a predetermined condition and the information on the power control procedure.

Control of receiver antenna diversity

A receiver for use in a CDMA telecommunications system is disclosed. The receiver includes at least one antenna for receiving signals from a CDMA channel, where the received signals include a desired user signal. The receiver also includes combining circuitry, for performing chip waveform filtering and maximal ratio combining, to produce mutually correlated chip estimates of the received signals. The receiver further includes an adaptive separator, for adaptively separating the mutually correlated chip estimates, and a correlator, for despreading the output of the adaptive separator to obtain an estimate for data symbols of the desired user signal. In addition, the receiver further includes estimating circuitry, coupled to the combining circuitry, for estimating a response of the channel, where the combining circuitry utilizes the channel response estimate as a reference.

Unsupervised adaptive chip separation filter for CDMA terminal

A receiver for use in a CDMA telecommunications system is disclosed. The receiver includes at least one antenna for receiving signals from a CDMA channel, an estimator for estimating an impulse response of the channel, and an adaptive equalizer. The estimator provides a reference for the adaptive equalizer, and the adaptive equalizer operates to estimate a transmitted chip sequence of the channel and to restore orthogonality among the received signals. The adaptive equalizer includes circuitry for utilizing a blind adaptive algorithm to estimate the transmitted chip sequence of the channel.

Growing community of inventors

Oulu, Finland

Petri Komulainen