主方向能量最大化协作波束形成波束调零方法

Main direction energy maximized beam nulling method for collaborative beamforming

为避免协作波束形成(CB)过程中虚拟阵列对非目标接收机造成干扰,提出了一种CB虚拟阵列波束调零方法。该方法能够在单个阵元发射功率存在上限的约束条件下,优化阵元的幅度和相位,使阵列在目标接收机所在方向上产生尽可能大的辐射功率并且在非目标接收机所在方向上形成功率零点。仿真结果证明了所提方法的有效性。此外,零点数量越多,阵列在主方向的辐射功率越小。

To avoid the virtual array from causing interference to unintended receivers during collaborative beamforming,a beam nulling method for CB virtual array was proposed.The method can optimize the amplitude and phase of the array elements in the case where the transmit power of a single array element is limited,so that the virtual array can achieve as higher radiation power as possible in the direction of the intended receiver and form power nulls in other directions of unintended receivers.The simulation results prove the effectiveness of the proposed method.Moreover,the more the number of nulls,the smaller the radiation power in the main direction is.