| 多普勒频移测量方法研究 |
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| 引用本文： | 刘丽哲,冯东升.多普勒频移测量方法研究[J].无线电工程,2009,39(5):51-53. |
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| 作者姓名： | 刘丽哲 冯东升 |
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| 作者单位： | 1. 中国电子科技集团公司第五十四研究所,河北,石家庄,050081
2. 中国人民解放军61846部队,河北,涿州,072750 |
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| 摘 要： | 多普勒频移是表征多径衰落信道时变特性的重要参数。从实测角度出发,根据多普勒功率谱与信道时间差相关函数之间的傅里叶变换关系,提出了一种基于接收信号电平测量的多普勒频移测量方法。开发了相应的数据处理软件,将测量数据以直观的图形表示出来,利用此测量方法在多条野外线路上进行了多普勒频移测量,获得了较精确的数值,为进行多径衰落信道下通信系统的合理设计起到了重要作用。
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| 关 键 词： | 多普勒频移 自相关函数 接收电平 衰落速率 |
Research on Measure Method of Doppler Shift |
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| LIU Li-zhe,FENG Dong-sheng.Research on Measure Method of Doppler Shift[J].Radio Engineering of China,2009,39(5):51-53. |
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| Authors: | LIU Li-zhe FENG Dong-sheng |
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| Affiliation: | LIU Li-zhe, FENG Dong-sheng (1. The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China; 2. The Unite 61846 of PLA, Zhuozhou Hebei 072750, China) |
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| Abstract: | Doppler shift is an important parameter for characterizing the time-varying muhipath fading channel. In this paper, a measuring method of Doppler shift based on the measurement of received signal level is introduced according to the Fourier transform relationship between Doppler spectrum and the correlation function of the difference in channel time. A corresponding software of data proeessing is developed, and measured data can be shown in visual graphics. The Doppler shifts of several field lines are measured using this method, and the results are quite accurate, which provides an important reference for the design of an optimum communication system with multipath fading channel. |
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| Keywords: | Doppler shift autoeorrelation function RSSI fading rate |
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