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Volume 24 Issue 8
Aug.  2002
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Zhang Hua, Gong Yaohuan . The space-temporal interference cancellation technology for the uplink of wcdma system[J]. Journal of Electronics & Information Technology, 2002, 24(8): 1102-1108.
Citation: Zhang Hua, Gong Yaohuan . The space-temporal interference cancellation technology for the uplink of wcdma system[J]. Journal of Electronics & Information Technology, 2002, 24(8): 1102-1108.

The space-temporal interference cancellation technology for the uplink of wcdma system

  • Received Date: 2000-11-14
  • Rev Recd Date: 2001-08-13
  • Publish Date: 2002-08-19
  • This paper simplifies the adaptive parallel interference cancellation (PIC) scheme into a ne method named soft-decision variant averaging amplitude estimation PIC technology. Relative to the adaptive PIC, the new method cuts down large amount of computational complexity, furthermore, it has better robustness than the adaptive PIC method. The simulations indicate that when a single sensor is used at the base station, the new method performs worse than the adaptive PIC method, especially under near far conditions. However, when an antenna array is used at the base station, and the array output is fed into PIC processing, the two PIC methods perform almost the same. Therefore, accounting to the frame structure of WCDMA, a space-temporal interference cancellation scheme including pilot-bits assisted LMS-DRMTA algorithm and soft-decision averaging amplitude estimation PIC is proposed for the uplink of WCDMA system. The overall scheme is characterized by low complexity and strong robustness.
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  • L.C. Godara, Applications of antenna arrays to mobile communications, Part I: Performance improvement, feasibility, and system considerations, Proc. IEEE, 1997, 85(7), 1031-1060.[2]B.G. Agee, Blind separation and capture of the communication signals using a multitarget constant modulus beamformer, Proc. IEEE Military Comm. Conf., Boston, MA, Oct., 1989,19.2.1-19.2.7.[3]Z. Rong, et al., Simulation of multitarget adaptive array algorithms for wireless CDMA systems,IEEE Vehicular Technology Conf., Phoenix, AZ, May 5-7, 1997, 1 5.[4]Z. Rong, et al., Despread-respread multi-target constant modulus array for CDMA systems, IEEE Communications Letters, 1997, 1(4), 114-116.[5]Guoqing Xue, Jianfeng Weng, et al., Adaptive multisatge parallel interference cancellation for CDMA, IEEE J. on SAC., 1999, SAC-17(10), 1815-1827.[6]T. Ojanpera.[J].et al., Qualitative comparison of some multiuser detector algorithms for wideband CDMA, VTC98, Ottawa, Canada, May.1998,:-[7]张华,等,WCDMA系统基站阵列接收方案带训练序列的LMS-DRMTA算法,电子与信息学报,2002,24(4),527-533[8]H. Liu, et al., Blind Equalization in antenna array CDMA systems, IEEE Trans. on Signal Processing, 1997, SP-45(11), 161-171.[9]D. Divasalar, et al., Improved parallel interference cancellation for CDMA, IEEE Trans. on Communications, 1998, COM-64(2), 258-268.
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