中文

Journal of Applied Sciences ›› 2009, Vol. 27 ›› Issue (3): 238-0243.

• Communication Engineering • Previous Articles     Next Articles

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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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

CLC Number: