通道之间幅相特性的不一致性(通道失配)严重影响着智能天线的性能,而通道均衡器是补偿通道失配的一种方法.如果不剔除因均衡而注入的信号,则它将严重影响用户的检测性能.本文在现有方法的基础上提出了一种新的校正方法,该方法利用自适应干扰抑制的原理抑制了注入信号,从而检测性能大大提高.最后,基于仿真实验的结果,讨论了均衡器及干扰抑制的性能与一些主要参数的关系.
Abstract
The performance of a smart antenna system is deteriorated markedly by the mismatch among antenna element channels.To combat this,an equalizer is usually used,but the detection of useful signals for active users is degraded since the additional signal is required in equalization.A new calibration method is proposed in this paper,which can mitigate the additional signal.Simulation results are presented to demonstrate its effectiveness,and the relationship between the performance and some key parameters is also discussed.
关键词
智能天线 /
自适应均衡器 /
自适应干扰抑制 /
校正
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Key words
smart antenna /
adaptive equalizer /
adaptive interference suppression /
calibration
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中图分类号：
TN82
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参考文献
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[7] 吴洹,张玉洪,吴顺君.用于阵列处理的自适应均衡器的研究[A].雷达信号处理重点实验室学术论文选编,第2部分:机载雷达空时二维信号处理,242-249.
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[9] 维德罗,史缔恩斯著.王永德,龙宪惠译校.自适应信号处理[M].四川大学出版社,1991.
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脚注
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基金
国家教育部跨世纪人才培养计划基金; 国家自然科学基金 (No.69802009)
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