| 一种正交空时分组码盲识别方法 |
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| 引用本文： | 赵知劲,陈林,沈雷,王海泉.一种正交空时分组码盲识别方法[J].压电与声光,2012,34(1):143-147. |
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| 作者姓名： | 赵知劲 陈林 沈雷 王海泉 |
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| 作者单位： | 1. 杭州电子科技大学通信工程学院,浙江杭州,310018
2. 杭州电子科技大学通信工程学院,浙江杭州 310018;浙江省综合信息网技术重点实验室,浙江杭州 314001 |
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| 基金项目： | 通信抗干扰国家重点实验室基金资助项目，浙江省综合信息网技术重点实验室开放课题基金资助项目 |
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| 摘 要： | 由于正交空时分组码(OSTBC)编码矩阵具有正交特性,可得正交空时分组码的虚拟信道矩阵的相关矩阵为对角矩阵。根据此原理,文中提出相关矩阵的非主对角元素能量与主对角元素能量之比的特征参数和基于此特征参数的正交空时分组码识别方法;同时利用最小描述长度(MDL)准则估计出信号子空间维数,即每组发射信号所含符号数。仿真结果表明,在不同发射天线数和接收天线数下,所提出的识别方法都具有较好的识别性能;符号数的估计性能与正确识别概率具有相同的变化规律。
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| 关 键 词： | 盲识别 正交空时分组码 虚拟信道矩阵 恒模算法 |
A Method for Blind Recognition of Orthogonal Space time Block Coding (OSTBC) |
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| ZHAO Zhijin,CHEN Lin,SHEN Lei and WANG Haiquan.A Method for Blind Recognition of Orthogonal Space time Block Coding (OSTBC)[J].Piezoelectrics & Acoustooptics,2012,34(1):143-147. |
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| Authors: | ZHAO Zhijin CHEN Lin SHEN Lei and WANG Haiquan |
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| Affiliation: | 1(1.School of Communication Engineering,Hangzhou University of Electronics Science and Technology,Hangzhou 310018,China; 2.Key Lab.of Comprehensive Information Technology in Zhejiang Province,Hangzhou 314001,China) |
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| Abstract: | Because the coding matrix in the orthogonal space-time block coding(OSTBC) has the orthogonal properties,the correlation matrix of the virtual channel matrix is a diagonal matrix.A characteristic parameter,which is the ratio of the energy of non-diagonal elements of primary of the correlation matrix to the energy of its primary diagonal elements,is proposed.A new method for blind recognition of OSTBC is proposed.MDL criterion is used to estimate the dimension of the signal subspace,that is,the number of symbols containing in each group of transmitted signals.The simulation results demonstrate that the proposed method achieves good performance to identify OSTBC when the numbers of transmitting antennas and receiving antennas are different.The estimation performance trend of the number of symbols is the same as the probability of correct identification. |
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| Keywords: | blind recognition orthogonal space-time block coding(OSTBC) virtual channel matrix constant modulus algorithm |
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