Nokia Corporation

Core Wireless Licensing S.a.r.l.

Zhengdi Qin

Juha Ylitalo

Harri Valio

A method including correlating a code having a first offset with a signal to produce a first correlation result; correlating the code having a second offset with the signal to produce a second correlation result; determining a cost function using the first correlation result and the second correlation result; and adjusting the first offset and the second offset in dependence upon the cost function, wherein the cost function uses a first weighting for the first correlation result and a second, different weighting for the second correlation result.

Methods, apparatuses and computer program products for code correlation of multi-path spread spectrum signals

For processing a sequence of samples of a signal, it is assumed that the signal comprises a carrier that is modulated by a code composed of a sequence of chips. A method of wiping-off an influence by the carrier on the sequence of samples and downsampling the sequence of samples (step; step; step) is shown, as well as utilizing the downsampled sequence of samples as a new sequence of samples for further processing (step; step; step). Also shown are a corresponding processing component, a corresponding electronic device, a corresponding system, a corresponding software program code and a corresponding software program product.

Processing a sequence of samples of a signal using downsampling

The invention relates to a receiving method and a receiver to be used in a cellular radio system. The received signal is FFT transformed and the spreading code of the receiver is FFT transformed in transform means (). A transformed signal () and spreading code () are multiplied to provide a product () whose phase is shifted by the propagation delay of the signal in shift means (). After this, a shifted product () is IFFT transformed in inverse transform means () at the same time as the components of the transmitted signals that have propagated on different paths are combined, whereby the information of the signal can be detected.

Receiving method and receiver

The invention relates to interpretation of a transmitted signal from signals obtained at the signal reception end from an antenna vector including several antenna elements. The inventive idea is to interpret the signal in two steps. In the first step, directed signal beams are formed of the multidimensional signal obtained from the antenna vector. In the second step, the directed signals are input to an optimum merger which deduces the transmitted signal from several signal branches used as input.

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Tampere, Finland

Zhengdi Qin