In this paper, a new tracking system for Code Shift Keying (CSK) is proposed. In the proposed system, a pair of synchronizing pseudo-noise (PN) sequences which consist of a manchester coded and a polar coded PN sequence are used. In this paper, the proposed system is applied to the external synchronization system with the synchronization PN sequence. The tracking error performance and the Bit error rate (BER) performance that takes the tracking error into account are evaluated by theoretical analysis. As the result, in single-user case, it is shown that BER performance of the proposed system is much the same as that of the conventional system. In multi-user case, the proposed system is superior to the conventional system. In particular, when BER achieves 10{sup}(-6) and the number of users is 10, the proposed system is superior to the conventional system by about 1dB.
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