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    초록·키워드

    PN code synchronization is necessary in all spread spectrum systems. This is accomplished by generating a local replica of the PN signal in the receiver and then synchronizing this local PN signal to the received PN signal. The current PN synchronization methods have the shortcoming that they may require complexed hardware structures. and once the hardware structures are decided, there is no flexibility. In all currently available methods for PN synchronization, a few drawbacks may be noticed;when the synchronization is not accomplished, the phase of the local PN generator is updated by the local Phase Locked Loop (PLL) and the synchronization procedure is repeated. Therefore they require excessive hardware to control the PLL [5]. And if the H/W structure is fixed, there is no flexibility to structure modification. In this paper, we focus our attention on the algorithm of S/W controlled PN synchronization to improve the flexibility. Namely, we can apply the proposed algorithm to both initial code acquisition and code tracking system. We implement this algorithm with a Field Programmable Gate Array (FPGA).

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      UCI(KEPA) : I410-ECN-0101-2009-569-013235711