| 天线相关性对空时频移键控(ST-FSK)系统性能的影响 |
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| 引用本文： | 蒋慧娟,谭笑,沈越泓. 天线相关性对空时频移键控(ST-FSK)系统性能的影响[J]. 应用科学学报, 2006, 24(4): 433-436 |
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| 作者姓名： | 蒋慧娟 谭笑 沈越泓 |
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| 作者单位： | 1. 解放军理工大学通信工程学院, 江苏南京 210007;2. 解放军理工大学63 研究所, 江苏南京 210007 |
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| 摘 要： | 给出了在已知天线相关因子条件下接收端的非相干ML判决度量,讨论了天线存在相关性时进制数、天线相关因子、信噪比和可靠性指标的关系.理论分析和仿真结果都表明:发射天线相关性的存在相当于破坏了发射信号的酉特性,迫使系统付出额外的“功率”代价.相应的“功率”代价随着相关因子的增加而非线性增加,而与进制数的关系很小.
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| 关 键 词： | 天线相关性 非相干最大似然检测 空时频移键控 |
| 文章编号： | 0255-8297（2006）04-0433-04 |
| 收稿时间： | 2005-05-10 |
| 修稿时间： | 2005-05-102005-09-06 |
Effect of Antenna Correlation on ST-FSK System Performance |
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| JIANG Hui-juan,TAN Xiao,SHEN Yue-hong. Effect of Antenna Correlation on ST-FSK System Performance[J]. Journal of Applied Sciences, 2006, 24(4): 433-436 |
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| Authors: | JIANG Hui-juan TAN Xiao SHEN Yue-hong |
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| Affiliation: | 1. Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China;2. Research Institute No. 63, PLA University of Science and Technology, Nanjing 210007, China |
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| Abstract: | Space-time frequency keying(ST-FSK) can be merged naturally into frequency-hopping communication systems.Based on a previous study,this paper presents an incoherent ML decision metric in the receiver with knowledge of transmitter antenna correlation,and discusses the relationship between correlation factor,SNR,and reliability index for binary ST-FSK and quaternary ST-FSK in the presence of antenna correlation.The theoretical analysis employs random variable decomposition.Simulation results show that the presence of transmitting antenna correlation,which is equivalent to destruction of unitary characteristics,imposes extra power cost on the performance of ST-FSK systems.The corresponding power cost increases nonlinearly with correlation factor,but makes little difference for binary ST-FSK and quaternary ST-FSK. |
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| Keywords: | space-time frequency-shift keying incoherent maximum likelihood(ML) detector antenna correlation |
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