Cell search method for multi-mode telecommunication apparatus, such apparatus, and computer program for implementing the method

A multi-mode telecommunication apparatus comprising:

• a radio receiver arranged to receive signals present in a frequency range;
• a transformer means arranged to transform signals received by the radio receiver into frequency domain;
• a power spectral density estimator arranged to estimate power spectral density of signals transformed by the transformer;
• a probability estimator arranged to estimate probability of different communication modes, said probability estimator comprising a correlator arranged to correlate the estimated power spectral density with power spectral density signatures of said different communication modes;
• a plurality of cell searchers, each arranged to perform cell searching for a communication mode;
• and
• a controller arranged to assign the one of said plurality of cell searchers to perform cell search according to the estimated most probable communication mode.

A computer readable storage medium having stored therein instructions, which when executed by a processor cause the processor to perform a cell search method for a multi-mode telecommunication apparatus, the method comprising:

• receiving signals present in a frequency range;
• transforming received signals into frequency domain;
• estimating power spectral density from transformed signals;
• estimating probability of different communication modes by correlating the estimated power spectral density with power spectral density signatures of said different communication modes;
• and
• performing cell search according to estimated most probable communication mode.