OFDMA上行链路SIC方法及性能分析

doi:10.13190/jbupt.200901.24.wangwb

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (1): 24-28.doi: 10.13190/jbupt.200901.24.wangwb

OFDMA上行链路SIC方法及性能分析

王卫兵朱秋萍徐心毅

武汉大学电子信息学院

收稿日期:2008-05-20 修回日期:2008-10-12 出版日期:2009-01-28 发布日期:2009-01-28
通讯作者: 王卫兵

A Successive Interference Cancellation in Uplink OFDMA Systems and Performance Analysis

WANG Wei-Bing

Received:2008-05-20 Revised:2008-10-12 Online:2009-01-28 Published:2009-01-28
Contact: WANG Wei-Bing

摘要/Abstract

摘要：

提出一种基于信噪比最优顺序的正交频分多址(OFDMA)上行链路快速串行干扰消除(SIC)方法．该方法利用干扰矩阵的各列近似正交特性，按照它们的相关程度，得到解调后信噪比最优的串行干扰消除子载波排列，避免了伪逆矩阵的求解，具有解调后各子载波上信号的信噪比联合最优、计算量低的特点，且可应用在任何子载波分配策略中．理论分析了OFDMA上行链路中各用户存在频偏时系统性能的下降．计算机仿真结果表明，该SIC方法能减小系统误码率．

Abstract:

A successive interference cancellation (SIC) algorithm based on signal to noise ratio (SNR) is proposed to mitigate the interference in the uplink orthogonal frequency division multiple access (OFDMA)systems. An optimal permutation of the detection order based on post SNR can be first found for the orthogonality of columns in interference matrix. Performance degradation in OFDMA uplink with CFOs is analyzed. Compared with other interference cancellation algorithms, there is no need for pseudo inverse operation. The algorithm is optimized on the means of SNR of all subcarriers in OFDMA systems and also applied in generalized carrier assignment scheme (CAS). The validity of the proposed algorithm is proved to be validated by numerical simulations.

Key words: orthogonal frequency division multiple access, successive interference cancellation, multi access interference, inter-carrier interference

王卫兵朱秋萍徐心毅. OFDMA上行链路SIC方法及性能分析[J]. 北京邮电大学学报, 2009, 32(1): 24-28.

WANG Wei-Bing. A Successive Interference Cancellation in Uplink OFDMA Systems and Performance Analysis[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2009, 32(1): 24-28.

参考文献

[1] IEEE-SA. IEEE Std 802.16E—2005, Standard for local and metropolitan area networks part 16[S]. New York: The Institute of Electrical and Electronics Engineering, Inc, 2006. 104.
[2] Tevfik Y, Huseyin A. Carrier frequency offset compensation with successive cancellation in uplink OFDMA systems[J]. IEEE Trans on Wireless Commun, 2007, 6(10): 3546-3551.
[3] Choi J, Lee C, Jung H W, et al. Carrier frequency off- set compensation for uplink of OFDM-FDMA systems[J]. IEEE Commun Lett, 2000, 4(12): 414-416.
[4] Cao Zhongren, Tureli U, Yao Yudong, et al. Frequency synchronization for generalized OFDMA uplink//Global Telecommunications Conference 2004. : IEEE Press, 2004: 1071-1075.
[5] Varanasi M K. Decision feedback multiuser detection: a systematic approach[J]. IEEE Trans on Info Theory, 1999, 45(1): 219-240.
[6] Trajkovic V D, Rapajic P B, Kennedy R A. Adaptive ordering for imperfect successive decision feedback multiuser detection[J]. IEEE Trans on Commun, 2008, 56(2): 173-176.
[7] Huang Defeng, Letaief K B. An interference cancellation scheme for carrier frequency offsets correction in OFDMA systems[J]. IEEE Trans on Commun, 2005, 53(7): 1155-1165.
[8] Huang Min, Chen Xiang, Zhou Shidong, et al. Analysis of iterative ICI cancellation algorithm for uplink OFDMA systems with carrier frequency offset. IEICE Trans on Commun, 2007, E90-B(7): 1734-1745.
[9] Huang Min, Chen Xiang, Zhou Shidong, et al. Iterative ICI cancellation algorithm for uplink OFDMA system with carrier frequency offset//Vehicular Technology Conference. : IEEE Press, 2005: 1613-1617.
[10] Wolniansky P W, Foschini G J, Golden G D, et al. VBLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel//Signals, Systems and Electronics 1998. Pisa: IEEE Press, 1998: 295-300.
[11] Greville T N E. Some applications of the pseudo inverse of a matrix[J]. SIAM Review, 1960, 2(1): 15-22.
[12] Liu Yuan, Mikhael W. Blind carrier frequency offset estimation for OFDM systems based on kurtosis//Circuits and Systems 2005. : IEEE Press, 2005: 127-130.
[13] Choi J. Nulling and cancellation detector for MIMO channels and its application to multistage receiver for coded signals: performance and optimization[J]. IEEE Trans on Wireless Commun, 2006, 5(5): 1207-1216.(上接第13页)
[3] Wu Yunnan, Chou P A, Kung S Y. Information exchange in wireless networks with network coding and physical-layer broadcast//2005 Conference on Information Sciences and Systems. Baltimore: , 2005: 203-209.
[4] Katti S, Rahul H, Hu Wenjun, et al. XORs in the air: practical wireless network coding//Proceedings of ACM SIGCOMM 2006 Conference. New York: ACM, 2006: 243-254.
[5] Zhang Shengli, Liew S C, Lam P P. Physical-layer network coding//MobiCom'06. Los Angeles: ACM, 2006: 358-365.
[6] Popovski P, Yomo H. Bi-directional amplification of throughput in a wireless multi-hop network//VTC 2006-Spring. Melbourne: IEEE Press, 2006: 588-593.
[7] Popovski P, Yomo H. Wireless network coding by amplify and forward for bi-directional traffic flows[J]. IEEE Communications Letters, 2007, 11(1): 16-18.
[8] Rankov B, Wittneben A. Spectral efficient protocols for half-duplex fading relay channels[J]. IEEE Journal on Selected Areas in Communications, 2007, 25(2): 379-389.
[9] 吕凌, 于宏毅, 郭金淮. 基于MAP映射算法的物理层网络编码性能分析[J]. 西安电子科技大学学报, 2007, 34(7): 55-58. Lü Ling, Yu Hongyi, Guo Jinhuai. Performance analysis of physical-layer network coding based on MAP mapping algorithm[J]. Journal of Xidian University, 2007, 34(7): 55-58.

OFDMA上行链路SIC方法及性能分析

A Successive Interference Cancellation in Uplink OFDMA Systems and Performance Analysis

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