Multipath propagation delay determining means using periodically inserted pilot symbols
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United States of America Patent
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May 4, 2004
Issued Date -
N/A
app pub date -
May 26, 1999
filing date -
May 1, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a multipath propagation delay determining means (STU, FIGS. 6, 7) 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 (P1, P2) 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.sub.1, S.sub.2) received from at least one antenna (Ant1, Ant2) within said cell (CL) into a digital CDMA multipath signal (S.sub.1, S.sub.2) consisting of consecutive radio frames (RF1 . . . RFn) including consecutive time slots (TS1 . . . 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-1, TSk, TSk+1) of each radio frame (RFn) and for storing them consecutively in a memory means (BUF) thereof; and a searching means (S1 . . . SL) for determining a power delay profile (DPS, DPS1, DPS2, FIG. 14) of said each antenna (Ant.1, Ant.2) on the basis of said extracted and stored complex pilot symbols and said data symbols (PSi, PDi).
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