移动通信带状网中智能天线的设计

Design of Smart Antenna for Zonal Network of Mobile Communication

针对移动通信中带状网内信号空间分布不同于蜂窝网内信号空间分布的特点,提出了一种新的均匀线阵的设计准则。此准则突破了传统的均匀线阵的阵元间距一般不超过信号的载波波长一半的限制,根据信号空间角度的分布来设计阵元间距。理论和仿真都证明了以此准则设计的均匀线阵与相同阵元数目且阵元间距为载波波长一半的均匀线阵相比,在避免了空间角度模糊问题出现的同时可有效地提高阵列的空间谱分辨能力。

For mobile communication, signal in zonal network has different characteristic of space distribution from that in cellular network. Based on the fact, a new design-criteria of ULA (uniform linear array) is presented. Breaking the traditional limit of interelement spacing of no more than carrier's half-wavelength, the criteria designs the interelement spacing according to the space distribution of signal impinging on ULA. Both the theoretical analysis and experimental result confirm the newly designed ULA can avoid the problem of angle ambiguity and achieve obviously higher resolution than that of ULA with interelement spacing of half-wavelength of carrier in the case of the same number of elements at the same time.