FH／MFSK多址系统中一种多用户检测算法
A Multiuser Detection Scheme for FH/MFSK Multiple Access Systems
-
摘要: 该文在对快跳频多址系统中同频干扰图案分析的基础上,提出了一种利用理想功控的条件进行同频干扰消除的多用户检测算法。这一算法是在时频矩阵上通过工作频点能量级的检测、分类,逐级判断重构干扰图案的基础上完成同频干扰的抵消。从理论分析与数值仿真两方面对这一算法进行了研究。结果表明,与已有的多址干扰消除算法相比,所提出的多用户检测算法不仅计算复杂度较低,算法的收敛性较好,而且适用于高斯信道与多经衰落信道。Abstract: This paper presents a multiuser detection algorithm for the frequency hopping MFSK (M-ary Frequency Shift Keying) multiple access systems under the assumption of ideal power control. By detecting and classifying the energy levels in the frequency hopping slots of the time-frequency matrix, the interference pattern is identified and the cochannel interference is cancelled step-by-step. Theoretical analysis and computer simulation results show that the new detector has lower complexity, better convergence stability, and is suitable for the AWGN and Rayleigh fading channels.
-
Viterbi A J. A processing satellite transponder for multiple access by low-rate mobile users[A]. Proc. Digital Satellite Communications Conference[C]. Montreal. Canada. 1978:166 - 173.[2]Goodman D J, Henry P S. Frequency-hopped multilevel FSK for mobile radio[J]. Bell Syst. Tech. J., 1980, 59(6): 1257 - 1275.[3]Fiebig U C. On the potential of FFH/MFSK CDMA for mobile radio systems[C]. Spread Spectrum Techniques and Applications,Proceedings 1998 IEEE 5th International Symposium on,Brussels, Belgium, 1998:332 - 337.[4]Verdu S. Optimum multiuser asymptotic effficiency[J].IEEE Trans. on Commun.1986, 34(9):890-[5]Mabuchi T, Kohno R. Muitiuser detection scheme based on canceling cochannel interference for MFSK/FH-SSMA system[J].IEEE J. on Selected Areas in Comm.1994,12(4):593-[6]Fiebig U C. Interative interference cancellation for FFH/MFSK MA system[J]. IEEProc.-Commun, 1996, 143(6): 380- 388.[7]Su Y T, Ye-Shun Shen, Chu-Ya Hsiao. On the detection of a class of fast frequency-hopped multiple access signals[J].IEEE J. on Selected Areas in Comm.2001, 19(11):2151-[8]Karen W H. Multistage multiuser detection for FHMA[J].IEEE Trans. on Commun.2000, 48(9):1550-[9]Varanasi M K, Aazhang B. Multistage detection in asynchronous code-division multiple-access communications[J].IEEE Trans.on Commun.1990, 38(4):509-[10]Lin S Y, Yang G C. Improved cochannel interference cancellation for MFSK/FH-SSMA systems[J].IEEE J. on Selected Areas in Comm.1999, 17(11):1940-[11]Wang Xia, Zhu Shihua, Zhang Penghui. Performance of fast frequency hopped multiple access system with M-FSK modulation[C]. Proceedings of the 7th International Conference on Telecommunications, Zagreb, Croatia, 2003:657 - 660. -
计量
- 文章访问数: 2372
- HTML全文浏览量: 125
- PDF下载量: 939
- 被引次数: 0
下载:
