论文部分内容阅读
性能最佳和近似最佳的码本在分频多址(CDMA)通信系统中有着重要的应用,它们用来区分不同用户发出的信号.目前,性能最佳的码本大多是由有限交换群上的差集合来构造的.丁存生和冯涛用有限交换群上的几乎差集合构造近似最佳的码本,使得码本参数(码长和码字个数)的选取更加的灵活,从而便于应用领域的选择.本文作者借助于构造几乎差集合的各种方法,在减弱几乎差集合要求条件的情形下构造了若干系列的码本,它们也是近似最佳的.近年来,丁存生等用有限域上的8阶分圆类发现了一类新的几乎差集合.本文用类似的方法构造方式构造出了一类近似最佳码本,但减弱了几乎差集合的要求条件.
Codebooks with best performance and best approximation have important applications in frequency division multiple access (CDMA) communication systems and are used to distinguish signals from different users. Currently, the best performing codebooks are mostly composed of limited switched groups On the finite difference swarm group, Ding Cun-Sheng and Feng Tao constructed the approximate optimal codebook, which made the selection of codebook parameters (code length and number of codewords) more flexible, The choice of fields of application.With the help of constructing various methods of almost poor set, the authors constructed some series of codebooks under the condition of weakening the requirements of almost poor set, which are also approximately the best approximation.In recent years, A new kind of almost poor set was found for the 8th order circle class in the domain.This paper constructs a kind of approximate best codebook in a similar way to construct, but weakens the requirements of almost poor set.