CDMA中的半盲恒模算法
Semi-blind Constant Modulus Algorithm for CDMA System
-
摘要: 该文研究了应用于CDMA上行链路多用户检测中的半盲恒模算法。它首先利用非盲算法消除所有小区内干扰用户的影响,接着再利用盲算法抵消剩余的干扰。通过仿真实验,将之与盲恒模算法及解相关算法相比较,可以看出在于扰用户增多时,本文提出的半盲恒模算法的性能明显优于另外两种算法。
-
关键词:
- CDMA; 多用户检测; 半盲恒模
Abstract: The semi-blind Constant Modulus (CM) algorithm which applied in the Multi-User Detection (MUD) of CDMA is studied. This approach fully utilizes all known users information, performs not-blind detector to suppress the interferes within the cell, and exploits blind detector to suppress the inter-cell interference. Compared with the blind CM algorithm and the decorrelating algorithm, the proposed semi-blind CM algorithm exhibits better SIR and BER performances and it is more robust when the system is heavily loaded. -
Hoing M, Madhow U. Blind adaptive multiuser detection[J].IEEE Trans. on Info. Theory.1995, 41(4):944-[2]Anders H. Semi-blind decorrelating multiuser detectors for CDMA: subspace methods[A]. IEEE PIMRC98[C], Boston,USA, 1998:202 - 207.Anders H. Semi-blind multi-user detectors for CDMA: subspace methods[A]. Proc. of ACSSC[C]. Pacific Grove, USA, 1998:1858- 1862.[3]Anders H. Hybrid semi-blind multiuser detectors for CDMA:subspace tracking methods[A]. Proc.of ICASSP[C]. Phoenix,USA, 1999:2695 - 2698.[4]Varanasi M. Near-optimum detection in synchronous codedivision multiple-access systems[J]. IEEE Trans. on Commu.,1990, 39(3): 825 - 836.[5]Xu Z.[J].Cheng R. Multistage semi-blind adaptive multiuser detector for reverse link in CDMA systems[A]. IEEE IC C 2001[C]. Helsinki, Finland.2001,:-[6]Wang X, Poor H. Blind adaptive multiuser detection:a subspace approach[J].IEEE Trans. On Info. Theory.1998, 44(2):677-[7]Xu C, Feng G. Comments on a linearly constrained constant modulus approach to blind adaptive multiuser interference suppression[J].IEEE Comm. Lett.2000, 4(1):280- -
计量
- 文章访问数: 2141
- HTML全文浏览量: 98
- PDF下载量: 893
- 被引次数: 0
下载:
