| 摘要 |
In a spread spectrum receiver, a despread section 102 despreads received signals ELI and ELQ through correlation of spread signals PnI and PnQ. An integration section 103 integrates I-phase correlation data PELI and Q-phase correlation data PELQ. A lead/lag addition section 104 adds, to I-phase integration data PELICc, lead/lag information representing whether the signal output from the integration section is in a lead phase or a lag phase. A delay circuit 108 delays, by one symbol, Q-phase integration data PELQCc and I-phase lead/lag information added integration data PELIa. A lead/lag level difference output section 109 outputs a level difference TAC between lead phase and lag phase. Further, a timing control section 112 controls the phase of the entire loop so as to eliminate the level difference, thus tracking synchronization of the spread signals.
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