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A class of band-limited chip waveforms for DS-CDMA systems

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Journal of Electronics (China)

Abstract

In Direct Sequence Code Division Multiple Access (DS-CDMA) systems, the chip waveform affects the implementation, system bandwidth, envelope uniformity, eye pattern and Multiple user Access Interference (MAI). In this paper, based on an elementary density function of a second order polynomial, a class of second order continuity pulses is proposed. From this class of pulses, we can find some members having faster decaying rate, bigger eye opening, more uniform envelope and stronger anti-MAI capability than the Nyquist waveform. The normalized-bandwidth-pulse-shape-factor product, the decaying rate of the tail of the time waveform, the opening of the eye diagram, and the envelope uniformity of the second order continuity pulses are addressed in the paper that provide the basic information for the selection of the chip pulse for CDMA systems.

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Authors and Affiliations

  1. Dept of Telecommun., Nanjing University of Posts and Telecommun., Nanjing, 210003, China

    Song Rongfang Ph.D. (male, professor), Bi Guangguo & Xie Daxiong

  2. Department of Radio Engineering, Southeast University, Nanjing, 210096, China

    Bi Guangguo

  3. ZTE Corporation, Shenzhen, 518057, China

    Xie Daxiong

Authors
  1. Song Rongfang Ph.D.
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  2. Bi Guangguo
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  3. Xie Daxiong
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Corresponding author

Correspondence to Song Rongfang Ph.D..

Additional information

Supported by University Natural Science Research Project of Jiangsu (No.03KJB510088) and National Natural Science Foundation of China (No.60572130).

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Song, R., Bi, G. & Xie, D. A class of band-limited chip waveforms for DS-CDMA systems. J. of Electron.(China) 24, 10–15 (2007). https://doi.org/10.1007/s11767-005-0060-7

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  • DOI: https://doi.org/10.1007/s11767-005-0060-7

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