Performance Comparison of Baseband Modulation Methods in DS-CDMA Communication System

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Journal of the Korea Institute of Military Science and Technology 2002;5(1):24-36.

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대역확산통신시스템에서 기저대역변조 방식에 따른 성능 비교

이성민, 김환우

¹국방과학연구소
²충남대학교

Abstract

It is important to use frequency resource effectively to support much more users, to maximize the DS-CDMA system performance. In this paper, we use MPSK, QAM, MFSK and PR coder as a baseband modulation method for DS-CDMA system. Increasing user's number, we compare the performance of each system using different baseband modulation method, by expecting BER performance. BPSK has generally good performance, in case of low power operation of terminal 8FSK has excellent performance relatively, PR has excellent performance when high power operation of terminal and also good for situation of excessive user's number. QAM is not suitable for DS-CDMA system.