基于分集技术的射频仿真角度精度提高

研究了提高射频仿真系统的角度精度的方法。提出了三元组分集技术,该技术通过使用多个三元组同时对同一个点目标进行模拟来提高仿真角度精度。不同三元组具有相互独立的角度误差的电磁能流在空中汇集,称之为空间合并。当各三元组的能流配以合适的权重时,空间合并会给出最佳的角度精度。该文依据最大比率合并算法,给出了各三元组的最佳权重。当5个三元组进行分集时,仿真角度误差的方差可以减小到原来的60%以下。参与分集的三元组数目越大,仿真角度精度越高。这对于进一步提高三元组射频仿真精度具有理论意义和实用价值。

Improvement of angle simulation accuracy of RFSS based on diversity

The technology to improve the angle simulation accuracy of the three-unit-array (TUA) radio-frequency-simulation-system (RFSS) is studied. TUA diversity technology is given through using multiple TUAs to simulate a same target simultaneously. Because the amplitude error is independent among different TUAs, the angle error is independent too. And then the electromagnetic wave (EMW) of these TUAs with different energy flow direction error will superpose together, which is called space combining. The EMW of these TUAs should have proper power weight to get best results. Therefore, the algorithm of max-ratio combining need be adopted. The optimal weight is given in this paper for TUA diversity with space combining. As a result, when five TUAs are used to simulate a point target, the variance of the angle error can be decreased to be less than 60%. The more TUAs are used, the more accurate the angle is. It is helpful in the further improvement of the angle simulation accuracy in the TUA RFSS.