| 二维扩展频谱系统下的PARAFAC接收机 |
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| 引用本文： | 张小飞,徐大专.二维扩展频谱系统下的PARAFAC接收机[J].南京邮电大学学报(自然科学版),2007,27(2):5-9. |
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| 作者姓名： | 张小飞 徐大专 |
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| 作者单位： | 南京航空航天大学,信息科学与技术学院,江苏,南京,210016 |
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| 基金项目： | 移动通信国家重点实验室开放基金
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南京航空航天大学校科研和教改项目 |
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| 摘 要： | 对二维扩展频谱系统的接收信号经过IDFT(离散傅里叶反变换)模块后的信号进行分析,表明此信号具有三线性模型特征;为此,提出了二维扩展频谱系统下PARAFAC(平行因子)接收机算法,该算法先利用三线性交替最小二乘(TALS)算法估计出信源矩阵,然后对其进行判决.仿真结果说明:二维扩展频谱系统PARAFAC接收机算法性能随着SNR增加越来越逼近于非盲相干检测接收机,而且在较低SNR条件下它们具有相近的性能.该算法无需时域扩频码、频域扩频码和信道衰落信息,是一种真正意义上的盲的检测算法.
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| 关 键 词： | 二维扩展频谱系统 平行因子 三线性模型 信号检测 扩展频谱系统 PARAFAC 接收机算法 Systems Spread Spectrum 检测算法 意义 信息 信道衰落 频域扩频码 算法性能 条件 相干检测 逼近 仿真结果 判决 源矩阵 估计 最小 性交 |
| 文章编号： | 1673-5439（2007）02-0005-05 |
| 收稿时间： | 2006-08-09 |
| 修稿时间： | 2006年8月9日 |
PARAFAC Receiver for Two-dimensional Spread Spectrum Systems |
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| ZHANG Xiao-fei,XU Da-zhuan.PARAFAC Receiver for Two-dimensional Spread Spectrum Systems[J].Journal of Nanjing University of Posts and Telecommunications,2007,27(2):5-9. |
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| Authors: | ZHANG Xiao-fei XU Da-zhuan |
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| Institution: | College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | An analysis of the DFT received signal of two-dimensional spread spectrum system shows that the received signal has trilinear model characteristics.Hence PARAFAC(PARArallel FACtor) receiver algorithm for two-dimension spread spectrum system is proposed in this paper.The algorithm uses trilinear alternating least square algorithm to attain the source matrix and then makes decision for the matrix.The simulation results reveal that,in comparison to non-blind correlator receiver,the performance of PARAFAC receiver algorithm is approaching to the former with SNR increasing and is similar to the former under the condition of lower SNR.It is a true blind detection algorithm in that it needs no knowledge of channel fading information as well as time domain and frequency domain spread spectrum codes. |
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| Keywords: | two-dimension spread spectrum system PARAFAC(parallel factor) trilinear model siganl detection |
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