Telefonaktiebolaget Lm Ericsson (publ)

Mathias Schulist

Branislav M Popovic

Wolfgang Granzow

Georg Frank

Alexander Maurer

The invention relates to a multipath propagation delay determining means (STU, FIGS. ) for determining a power delay spectrum (DPS) of a CDMA signal transmission between a CDMA base station (BS) and a CDMA mobile station (MS) on a plurality of propagation paths (P , P ) within a cell (CL) of a CDMA communication system, comprising an A/D conversion means (A/D) for converting an analog CDMA multipath signal (S , S ) received from at least one antenna (Ant , Ant ) within said cell (CL) into a digital CDMA multipath signal (S , S ) consisting of consecutive radio frames (RF . . . RFn) including consecutive time slots (TS . . . TSm) with complex pilot symbols (PSi) and data symbols (Pdi), a demultiplexing means (PI-DEMUX) for extracting complex pilot symbols (PSi) and data symbols (PDi) from at least two consecutive time slots (TSk&minus;1, TSk, TSk&plus;1) of each radio frame (RFn) and for storing them consecutively in a memory means (BUF) thereof; and a searching means (S . . . SL) for determining a power delay profile (DPS, DPS , DPS , FIG. ) of said each antenna (Ant. , Ant. ) on the basis of said extracted and stored complex pilot symbols and said data symbols (PSi, PDi).

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Erlangen, Germany

Mathias Schulist