Multi-path search apparatus and method in a wireless communication system

A multi-path search apparatus for a terminal of a Time Division Duplex (TDD) wireless communication system, the multi-path search apparatus comprising:

• a 1st correlator configured to get a 1st correlation value between a received signal and a 1st code comprising a pilot signal component for downlink synchronization;
• a 2nd correlator configured to get a 2nd correlation value between the received signal and a 2nd code comprising a signal component for channel estimation;
• a coupler configured to coherently or noncoherently couple the 1st correlation value and the 2nd correlation value;
• and
• a multi-path information generator configured to get the correlation energy of the output of the coupler and to generate multi-path information.

A multi-path search method in a wireless communication system, the method comprising:

• getting a 1st correlation value between a received signal and a 1st code;
• getting a 2nd correlation value between the received signal and a 2nd code;
• coupling the 1st correlation value and the 2nd correlation value and outputting a coupled correlation value;
• and
• getting the correlation energy of the coupled correlation value and generating multi-path information.

A multi-path search method for a terminal of a Time Division Duplex (TDD) wireless communication system, the method comprising:

• getting a 1st correlation value between a received signal and a 1st code comprising a pilot signal component for downlink synchronization;
• getting a 2nd correlation value between the received signal and a 2nd code comprising a signal component for channel estimation;
• coupling the 1st correlation value and the 2nd correlation value and outputting the coupled correlation value;
• and
• getting the correlation energy of the coupled correlation value and generating multi-path information.