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应用科学学报 ›› 2009, Vol. 27 ›› Issue (3): 238-0243.

• 通信工程 • 上一篇    下一篇

IDMA中的线性同余交织器研究(英)

雷萌1， 朱光喜1;2， 林沛1， 陈永辉1   

  1. 1. 华中科技大学电子与信息工程系，武汉430074
    2. 华中科技大学光电国家实验室，武汉430074
  • 收稿日期:2008-11-15 修回日期:2009-03-26 出版日期:2009-05-28 发布日期:2009-05-28

Linear Congruential Interleavers in IDMA

  1. 1. Department of Electronics and Information Engineering, Huazhong University of Science and Technology,
    Wuhan 430074, China
    2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology,
    Wuhan 430074, China
  • Received:2008-11-15 Revised:2009-03-26 Online:2009-05-28 Published:2009-05-28
  • About author:Corresponding authors TASSING Remi, Ph.D. candidate, research interests including interleave-division multiple-access and multiuser detection, E-mail: tassingremi@gmail.com; ZHU Guang-xi, Ph.D. supervisor, professor, research interests including broadband multimedia communication and related topics, E-mail: gxzhu@mail.hust.edu.cn
  • Supported by:

    Project supported by the“863”National High-Tech Research and Development Program of China (No.2008AA01Z211); the International Science and Technology Cooperation Program(No.2008DFA11630)

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摘要：

        提出一种基于线性同余生成器(LCG)来构造IDMA系统中随机交织器的方法. 该方法通过选择LCG的参数使其周期达到最大. 为了设计方便，取LCG的模为2 的整数幂. 利用文中的方法产生母交织器，再对其进行循环移位，即得到每个用户的交织器. 其中超出交织范围的随机数将被丢弃. 数学推导证明，在上述条件下LCG的模必须严格大于交织器的深度. 利用基向量相关峰值方法和误比特率性能证明了文中方法的有效性.

关键词: 交织多址 ,   线性同余生成器 ,   基向量相关性峰值 ,   循环移位 ,   随机交织器

Abstract:

      A method based on linear congruential generator (LCG) is used to construct random interleavers for interleave-division multiple-access (IDMA). One interleaver, called the mother interleaver, is first generated and then cyclically shifted to obtain the other interleavers, each belonging to one user. We propose to choose the LCG parameters such that its maximum period is reached and, for convenience, the LCG modulus is a power of 2. With these settings, the modulus should be strictly greater than the interleaver size. A mathematical proof is provided for this matter. Out-of-bound random numbers are simply discarded. Finally, peak basis correlation and bit-error rate analysis are used to show correctness of the theoretical expectations. 

Key words: interleave-division multiple-access (IDMA) ,  linear congruential generator (LCG) ,  peak basis correlation(PBC) ,  cyclic shift , random interleaver

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