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    초록·키워드

    Code Tracking Loop is one of main subjects in Direct Sequence-Spread Spectrum(DS-SS) that is popular in commercial applications. We described characteristics of the full Digital Delay Locked Loop(DDLL) for CDMA PCS system. we derived its S-curve characteristic to present its proper operation. Above Code Tracking Loop was implemented using Field Programmable Gate Array(FPGA) and Digital Signal Processor (DSP) for PCS Testbed and logic simulation was performed. Operation of this equipment was verified by call test.

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      UCI(KEPA) : I410-ECN-0101-2009-567-012297457