非理想正交发射信号对频控阵波束的影响

为考察发射非理想正交基带信号对频控阵波束的影响,基于频控阵信号模型引出了基带信号正交问题,从数学上推导频控阵发射非理想正交基带信号情况下的波束表达式,进一步分析匹配接收处理性能.基于频控阵波束发射和匹配接收计算量,提炼出影响分析评估因子,构建了频控阵基带发射信号正交特性与波束、匹配接收性能的定量分析关系.基于6类典型随...

Effect of transmitting nonideal quadrature signal on frequency diversity array beamform

To analyze the impact of transmitting nonideal quadrature signal on FDA (frequency diversity array) beamform, based on the signal model of FDA, the orthogonality issue of baseband signal was brought out, the beamform expression was deduced mathematically under the condition that FDA system transmitting nonideal orthogonal baseband signal, and the performance of matched reception processing was further analyzed. Based on the calculation amount of beamform transmission and matched reception of FDA system, the influencing factors were extracted, and a quantitative analysis of the relationship between the orthogonal characteristics of the baseband signals and the performance of the beamform and matched reception was constructed. Based on the numerical simulation of six kinds of typical random distribution biphasic coded baseband signals, the correctness of theoretical analysis was verified by experiments. Different random distributions show different baseband signal orthogonal characteristics, and their influence on the performance of FDA beamform transmission and matching reception varies with the orthogonal characteristics. From the perspective of orthogonality, the application potential of baseband signal based on Normal, Uniform and Logistic random distribution is better.