Performance of the multi phased mc-cdma system with nonlinear amplifier

Cheol Yong Ahn, Chi Hun Ahn, Seung Moon Ryu, Dong Ku Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Multi-code CDMA (MC-CDMA) can not only be integrated easily with a conventional system, but also achieve good spectral efficiency and high processing gain. However, it suffers from high value of peak-to-average power ratio (PAPR). In this paper, we propose a multi-phase CDMA (MP-CDMA) system that can provide variable rate service and is not susceptible to the nonlinear characteristics of the amplifier. The clipping is introduced at the output of the multi-code modulator and at the input of the MPSK modulator in order to improve the performance of the MPSK chip demodulator and reduce the system complexity. The system performance is compared for the different number of codes and different clipping levels. The optimum clipping level is also evaluated for a different number of codes in both AWGN and frequency flat fading channel.

Original languageEnglish
Article number993528
Pages (from-to)396-399
Number of pages4
JournalIEEE Wireless Communications and Networking Conference, WCNC
Volume1
DOIs
Publication statusPublished - 2002 Jan 1

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Code division multiple access
Modulators
Demodulators
Fading channels
Processing

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "Multi-code CDMA (MC-CDMA) can not only be integrated easily with a conventional system, but also achieve good spectral efficiency and high processing gain. However, it suffers from high value of peak-to-average power ratio (PAPR). In this paper, we propose a multi-phase CDMA (MP-CDMA) system that can provide variable rate service and is not susceptible to the nonlinear characteristics of the amplifier. The clipping is introduced at the output of the multi-code modulator and at the input of the MPSK modulator in order to improve the performance of the MPSK chip demodulator and reduce the system complexity. The system performance is compared for the different number of codes and different clipping levels. The optimum clipping level is also evaluated for a different number of codes in both AWGN and frequency flat fading channel.",
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Performance of the multi phased mc-cdma system with nonlinear amplifier. / Ahn, Cheol Yong; Ahn, Chi Hun; Ryu, Seung Moon; Kim, Dong Ku.

In: IEEE Wireless Communications and Networking Conference, WCNC, Vol. 1, 993528, 01.01.2002, p. 396-399.

Research output: Contribution to journalArticle

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