S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Others_전기·정보공학부
Optimum PSK signal constellation for Multi-Phase B-CDMA Systems
다중 위상 B-CDMA 시스템에서 최적의 PSK 신호 매핑
- Seo, Yeong-Jin; Lee, Yong-Hwan
- Issue Date
- 제16회 신호처리합동학술대회논문집, 2003년
- Although CDMA system can efficiently support multiple users, it suffers from large peak-to-average power ratio (PAPR) as the number of users increases. It requires the use of a highly linear power amplifiers with a large back off. Recently, a new CDMA scheme, called binary CDMA (B-CDMA), has been proposed to alleviate this problem . In B-CDMA systems, the envelope of multi-user CDMA signals is truncated into a small number of levels to reduce the PAPR. The performance of B-CDMA system is mainly limited by two types of noise; the truncation and decision error. The truncation noise can be minimized by Lloyd-max algorithm . In this paper, the optimum PSK signal constellation is analytically designed in multi-phase B-CDMA to minimize the decision errors. Finally, the analytic results are verified by computer simulation.
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