MC-CDMA信号子载波参数盲估计
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摘要
为解决多载波码分多址(MC-CDMA)信号子载波参数估计问题,提出四阶循环累积量算法。利用MC-CDMA信号子载波之间的正交性,对信号的每一路子载波分别求其四阶循环累积量,进行累加求出信号的四阶循环累积量,估计出MC-CDMA信号的子载波数目和子载波频率间隔。通过分析单载波信号的四阶循环累积量,估计单载波信号的载波频率,进一步识别出MC-CDMA信号和单载波信号。仿真结果表明,该算法在较低信噪比下可以有效估计MC-CDMA信号的子载波参数和单载波信号的载波频率。
To solve the subcarrier parameter estimation problem in multi carrier-code division multiple access(MC-CDMA)signal,the fourth-order cyclic cumulants method was proposed.Using the orthogonality between subcarriers of the MC-CDMA signal,the fourth-order cyclic cumulants was obtained for each subcarrier of the signal,and the fourth-order cyclic cumulants of the signal was accumulated.The number of subcarriers and the subcarrier frequency interval of the MC-CDMA signal were estimated.Based on the analysis of the fourth-order cyclic cumulants of the single carrier signal,carrier frequency of the signal was estimated.The MC-CDMA signal and the single carrier signal were identified.The simulation results show that the proposed algorithm can effectively estimate the subcarrier parameters of the MC-CDMA signal and the carrier frequency of the single carrier signal at lower signal-to-noise ratio.
To solve the subcarrier parameter estimation problem in multi carrier-code division multiple access(MC-CDMA)signal,the fourth-order cyclic cumulants method was proposed.Using the orthogonality between subcarriers of the MC-CDMA signal,the fourth-order cyclic cumulants was obtained for each subcarrier of the signal,and the fourth-order cyclic cumulants of the signal was accumulated.The number of subcarriers and the subcarrier frequency interval of the MC-CDMA signal were estimated.Based on the analysis of the fourth-order cyclic cumulants of the single carrier signal,carrier frequency of the signal was estimated.The MC-CDMA signal and the single carrier signal were identified.The simulation results show that the proposed algorithm can effectively estimate the subcarrier parameters of the MC-CDMA signal and the carrier frequency of the single carrier signal at lower signal-to-noise ratio.
引文
[1]Wojuola OB,Mneney SH,Srivastava V.Performance of DSCDMA and MC-CDMA systems in Gaussian and Rayleigh fading channels[C]//IEEE International Conference on Computational Intelligence and Computing Research.IEEE,2015:1-6.
[2]Rasadurai K,Kumaratharan N.Performance of MC-CDMA system thorough Turbo block codes[C]//International Conference on Electronics and Communication Systems.IEEE,2015:532-537.
[3]ZHANG Linyuan,YANG Wei.Channel estimation of timefrequency coded cooperation MC-CDMA in mine tunnel[J].Journal of China Coal Society,2015,40(2):481-486(in Chinese).[张琳园,杨维.矿井巷道时频编码协作MC-CDMA信道估计[J].煤炭学报,2015,40(2):481-486.]
[4]XU Jingjing,YANG Wei,ZHANG Linyuan,et al.Adaptive power allocation for time-frequency coded cooperation MC-CDMA system in mine roadway[J].Journal of China Coal Society,2015,40(8):1969-1976(in Chinese).[许晶晶,杨维,张琳园,等.矿井巷道时频编码协作MC-CDMA自适应功率分配[J].煤炭学报,2015,40(8):1969-1976.]
[5]ZHANG Linyuan,YANG Wei.The wireless transmission of time-frequency coded cooperation MC-CDMA in mine tunnel[J].Journal of China Coal Society,2014,39(6):1177-1183(in Chinese).[张琳园,杨维.矿井巷道时频编码协作MCCDMA无线传输[J].煤炭学报,2014,39(6):1177-1183.]
[6]ZHENG Wenxiu,ZHAO Guoqing,LUO Ming.Blind estimation of OFDM sub-carrier frequencies based on the high-order cyclic cumulants[J].Journal of Electronics&Information Technology,2008,30(2):346-349(in Chinese).[郑文秀,赵国庆,罗明.基于高阶循环累积量的OFDM子载波盲估计[J].电子与信息学报,2008,30(2):346-349.]
[7]CAO Peng,PENG Hua,ZHANG Jincheng.Blind estimation of OFDM sub-carrier frequencies over frequency-selective fading channel[J].Video Engineering,2011,35(3):67-70(in Chinese).[曹鹏,彭华,张金成.频率选择性衰落信道下OFDM子载波数盲估计[J].电视技术,2011,35(3):67-70.]
[8]LIU Yu,ZHANG Tianqi,LI Can.Blind estimation of OFDM sub-carrier frequencies based on the high-order cyclic cumulants[J].Science Technology and Engineering,2014,14(20):251-256(in Chinese).[刘瑜,张天琪,李灿.基于高阶循环累积量的正交频分复用(OFDM)信号子载波调制识别算法[J].科学技术与工程,2014,14(20):251-256.]
[9]ZHENG Wenxiu,ZHAO Guoqing,LUO Ming.Blind estimation of star-QMA carrier frequency based on the cyclostationary cumulants[J].Systems Engineering and Electronics,2008,30(2):233-235(in Chinese).[郑文秀,赵国庆,罗明.基于循环累积量的星型QAM载波盲估计[J].系统工程与电子技术,2008,30(2):233-235.]
[10]YAN Zhan,KANG Kai,WANG Hongjun.An improved blind carrier frequency estimation algorithm for satellite MPSK signals[J].Telecommunication Engineering,2013,53(9):1186-1190(in Chinese).[燕展,康凯,王红军.一种改进的卫星MPSK通信信号盲载频估计算法[J].电讯技术,2013,53(9):1186-1190.]
[2]Rasadurai K,Kumaratharan N.Performance of MC-CDMA system thorough Turbo block codes[C]//International Conference on Electronics and Communication Systems.IEEE,2015:532-537.
[3]ZHANG Linyuan,YANG Wei.Channel estimation of timefrequency coded cooperation MC-CDMA in mine tunnel[J].Journal of China Coal Society,2015,40(2):481-486(in Chinese).[张琳园,杨维.矿井巷道时频编码协作MC-CDMA信道估计[J].煤炭学报,2015,40(2):481-486.]
[4]XU Jingjing,YANG Wei,ZHANG Linyuan,et al.Adaptive power allocation for time-frequency coded cooperation MC-CDMA system in mine roadway[J].Journal of China Coal Society,2015,40(8):1969-1976(in Chinese).[许晶晶,杨维,张琳园,等.矿井巷道时频编码协作MC-CDMA自适应功率分配[J].煤炭学报,2015,40(8):1969-1976.]
[5]ZHANG Linyuan,YANG Wei.The wireless transmission of time-frequency coded cooperation MC-CDMA in mine tunnel[J].Journal of China Coal Society,2014,39(6):1177-1183(in Chinese).[张琳园,杨维.矿井巷道时频编码协作MCCDMA无线传输[J].煤炭学报,2014,39(6):1177-1183.]
[6]ZHENG Wenxiu,ZHAO Guoqing,LUO Ming.Blind estimation of OFDM sub-carrier frequencies based on the high-order cyclic cumulants[J].Journal of Electronics&Information Technology,2008,30(2):346-349(in Chinese).[郑文秀,赵国庆,罗明.基于高阶循环累积量的OFDM子载波盲估计[J].电子与信息学报,2008,30(2):346-349.]
[7]CAO Peng,PENG Hua,ZHANG Jincheng.Blind estimation of OFDM sub-carrier frequencies over frequency-selective fading channel[J].Video Engineering,2011,35(3):67-70(in Chinese).[曹鹏,彭华,张金成.频率选择性衰落信道下OFDM子载波数盲估计[J].电视技术,2011,35(3):67-70.]
[8]LIU Yu,ZHANG Tianqi,LI Can.Blind estimation of OFDM sub-carrier frequencies based on the high-order cyclic cumulants[J].Science Technology and Engineering,2014,14(20):251-256(in Chinese).[刘瑜,张天琪,李灿.基于高阶循环累积量的正交频分复用(OFDM)信号子载波调制识别算法[J].科学技术与工程,2014,14(20):251-256.]
[9]ZHENG Wenxiu,ZHAO Guoqing,LUO Ming.Blind estimation of star-QMA carrier frequency based on the cyclostationary cumulants[J].Systems Engineering and Electronics,2008,30(2):233-235(in Chinese).[郑文秀,赵国庆,罗明.基于循环累积量的星型QAM载波盲估计[J].系统工程与电子技术,2008,30(2):233-235.]
[10]YAN Zhan,KANG Kai,WANG Hongjun.An improved blind carrier frequency estimation algorithm for satellite MPSK signals[J].Telecommunication Engineering,2013,53(9):1186-1190(in Chinese).[燕展,康凯,王红军.一种改进的卫星MPSK通信信号盲载频估计算法[J].电讯技术,2013,53(9):1186-1190.]