Synchronization establishing and tracking circuit for CDMA base station

A synchronization establishing and tracking circuit for a CDMA base station comprising:

• a spreading code generator generating a spreading code sequence;
• a correlator calculating correlation between said spreading code sequence and a quasi-coherent signal corresponding to a received signal received by said CDMA base station;
• a ranking circuit storing a plurality of ranked phases;
• and
• a phase setting circuit setting said phase to a selected phase selected from among said plurality of ranked phases.

A synchronization establishing and tracking method for a CDMA base station comprising:

• generating a first spreading code sequence;
• calculating first correlation between said first spreading code sequence and a first quasi-coherent signal corresponding to a first received signal received by said CDMA base station;
• generating a second spreading code sequence;
• calculating second correlation between said second spreading code sequence and a second quasi-coherent signal corresponding to a second received signal received by said CDMA base station;
• producing an added quasi-coherent signal on which said first and second quasi-coherent signals are added;
• and
• determining a first phase of said first spreading code sequence based on said added quasi-coherent signal.

A synchronization establishing and tracking method for a CDMA base station comprising:

• generating a spreading code sequence;
• calculating correlation between said spreading code sequence and a quasi-coherent signal corresponding to a first received signal received by said CDMA base station;
• storing a plurality of ranked phases;
• and
• setting said phase to a selected phase selected from among said plurality of ranked phases.