| 摘要 |
PROBLEM TO BE SOLVED: To provide a pilot signal receiver capable of improving reception performance when combining and receiving pilot signal carriers. SOLUTION: Aπ/4 shift delay detection circuit 60 performs the phase rotation correction of -π/4. Thus, phase rotation accompanying the addition of the guard interval of 1/8 to an effective symbol length is corrected. Also, a 2-carrier reception circuit 110 and 1-carrier reception circuits 120 and 130 detect the pilot signals of 4 carriers and adders 140-142 add and combine the signals. Thus, compared to the case of detecting, adding and combining 2 carriers, more carrier composition gain is obtained and reception sensitivity is improved further. Also, a wide band frequency correction circuit 76 and a complex multiplication circuit 75 correct frequency shift in which a carrier interval is≥±1/2. Thus, a reception tuner and an oscillator or the like can cope with temperature drift. COPYRIGHT: (C)2008,JPO&INPIT
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