【摘要】 为了提高基于子空间的盲多用户检测方法的性能,在简要介绍了现有的跟踪向量序列的主要子空间和特征元素的快速算法的基础上,提出了正交压缩近似投影子空间跟踪算法(OPASTd),该算法在应用压缩技术的同时,保证了每次迭代估计出的信号子空间的正交性。将该算法应用于多用户检测系统时,系统的抗多址干扰(MAI)和抗远近效应的能力和其他算法相比都有所提高,特别是在抗远近效应方面提高较大。更多还原

【Abstract】 For improving the performance of blind multi-user detection,the existing algorithms for fast tracking of principal subspace and principal components of a vector sequence were introduced.Then,the orthonormal projection approximation and subspace tracking of deflation(OPASTd)algorithm which uses deflation technique was presented.This algorithm guarantees the orthonormality of the signal subspace at each iteration.When it was applied in a multi-user detection system,the resistance to MAI and near-far effect was enhanced,especially the near-far effect was nearly eliminated.is better than especially the near-far effect is nearly eliminated.更多还原