| 时空调制扩频通信定位系统抗多径测角测距方法 |
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| 引用本文： | 史庭祥,宋茂忠. 时空调制扩频通信定位系统抗多径测角测距方法[J]. 应用科学学报, 2004, 22(2): 136-139 |
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| 作者姓名： | 史庭祥 宋茂忠 |
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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： | 国家自然科学基金资助项目(69972018) |
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| 摘 要： | 在时空调制扩频通信系统基础上,针对多径环境提出一种抗码片内多径干扰的测角测距方法.首先分析了时空调制信号在多径下的接收和解调信号,接着就解调表达式采用冲激响应估计和多径分量提取算法,实现了码跟踪误差和多径分量的联合估计,再利用换算关系得到方位角和距离.仿真结果表明,在多径下系统的测角测距性能得到很大的改善.
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| 关 键 词： | 全球定位系统 无线定位 多径抵消 扩频通信 移动通信 信号检测与估计 |
| 文章编号： | 0255-8297(2004)02-0136-04 |
| 收稿时间： | 2002-12-28 |
| 修稿时间： | 2003-06-11 |
A Scheme of Direction-Finding and Ranging in the Presence of Multipath Interference for a New Integrated System of Communication and Radiolocation with Space-Time Modulation |
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| SHI Ting-xiang,SONG Mao-zhong. A Scheme of Direction-Finding and Ranging in the Presence of Multipath Interference for a New Integrated System of Communication and Radiolocation with Space-Time Modulation[J]. Journal of Applied Sciences, 2004, 22(2): 136-139 |
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| Authors: | SHI Ting-xiang SONG Mao-zhong |
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| Affiliation: | College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | We carry out research on how to promote the accuracy of direction-finding and ranging in the presence of multipath interference in a new integrated system of communication and radiolocation with space-time modulation. First, we analyze how this space-time signal is received and demodulated in a multipath environment. Second, multipath channel pulse response is estimated without taking channel noise into account, a kind of joint-estimation, which is combined with a simple new algorithm for extracting multipath components is realized. Finally, simulation results are given. The results of the simulation demonstrate that the accuracy of the location is improved after adopting the method. |
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| Keywords: | multipath mitigation spread spectrum communication mobile communication GPS wireless location signal detection and estimation |
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