文章摘要
朴大志,孙长瑜,李启虎.空间相关性对水声多输入多输出系统信道容量的影响[J].声学技术,2006,(6):573~579
空间相关性对水声多输入多输出系统信道容量的影响
Effect of spatial correlation on underwater acoustic MIMO capacity
投稿时间:2006-04-20  修订日期:2006-07-11
DOI:
中文关键词: 多输入多输出  水声  空间相关  信道容量
英文关键词: MIMO  underwater acoustics  spatial correlation  channel capacity
基金项目:
作者单位
朴大志 中国科学院声学研究所, 北京, 100080
中国传媒大学信息工程学院, 北京, 100024 
孙长瑜 中国科学院声学研究所, 北京, 100080 
李启虎 中国科学院声学研究所, 北京, 100080 
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中文摘要:
      通过三维多径相关模型,以垂直收发阵为例研究了信道参数如声线角度扩展范围、到达方向和收发阵元间距对水声MIMO信道容量的影响。如果考虑静止的收发阵,且不考虑信道中散射体的运动时,MIMO系统的信道容量由收发阵元信号的空间相关性决定,当空间相关性较小时,增加收发阵元数可以带来较大的信道容量增益,而当空间相关性较大时,随着收发阵元数的增加信道容量将趋于饱和。
英文摘要:
      The effect of channel parameters such as angle spread, angle of arrival, and array element spacing on the underwater acoustic MIMO capacity is studied with a three-dimensional multipath correlation model using a vertical transmitting and receiving array. In a MIMO system with static transmitting and receiving arrays, regardless of the movement of scatters in the underwater acoustic channel, the capacity is dependent on the spatial correlation among array element signals at the transmitter as well as at the receiver. If correlation between elements of the channel matrix is weak, increasing the number of array elements will greatly increase the MIMO capacity. In a channel of strong correlation, increasing the number of array elements will cause the MIMO capacity to approach saturation.
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