Space-time duality in multiple antenna channels
Space-time duality in multiple antenna channels
复制标题
多天线通道中的时空对偶性
DOI：
10.1109/twc.2009.070938
复制
发表时间：
2009
影响因子：
10.4
通讯作者：
Kaushik Chakraborty
中科院分区：
文献类型：
--
作者：
M. Franceschetti;Kaushik Chakraborty
本文从第一性物理原理出发，研究了散射体在多天线信道中的信息传输问题。电磁辐射所能传输的信息量与发射天线和散射体组成的系统的空间波数和时频谱以及接收域的空间扩展有关。场的空间信息含量与信道的相关通信模式的数量有关。它示出，对于窄带频率传输的空间和时间可以解耦，导致在辐射系统的容量的计算中的时空信息对偶原理。相反，在宽带频率传输的情况下，它表明，时间和空间不能解耦，它们共同表征波的信息内容。
The concept of information transmission in a multiple antenna channel with scattering objects is studied from first physical principles. The amount of information that can be transported by electromagnetic radiation is related to the space-wavenumber and the time-frequency spectra of the system composed by the transmitting antennas and the scattering objects, and to the spatial extension of the receiving domain. The spatial information content of the field is related to the number of relevant communication modes of the channel. It is shown that for narrow-band frequency transmission space and time can be decoupled, leading to a space-time information duality principle in the computation of the capacity of the radiating system. In contrast, in the case of wide-band frequency transmission, it is shown that time and space cannot be decoupled and they jointly characterize the wave's information content.