| http://www.w3.org/ns/prov#value | - Referring back to FIG. 1, pilot signal spreading circuits 104-1 to 104-N (N is an integer not less than two; the same applies to the following description) respectively spread pilot signals 40-1 to 40-N for the antennas 107-1 to 107-N with unique codes assigned to the respective spreading circuits.
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