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针对16波束61阵元数字波束成形(DBF)星载相控阵天线的高速信号处理要求,提出以实信号处理为主体的分布式DBF网络架构,较复信号处理模式节省了一半的资源和数据传输量。通过时域Hilbert变换和分布式算法对波束成形网络各单元进行合理设计,降低了算法的运算量,也减少了硬件资源开销;同时通过单音闭环校正回路设计,改善了射频通道一致性。研制了DBF网络硬件平台和半实物仿真系统,验证了算法设计的正确性。本文提出的算法对资源有限的阵列信号处理有一定的借鉴意义。
In order to meet the high-speed signal processing requirements of 16-beam 61-element digital beamforming (DBF) spaceborne phased array antenna, a distributed DBF network architecture based on real signal processing is proposed. Half the resources and data are saved in the complex signal processing mode Transfer volume. Through time-domain Hilbert transform and distributed algorithm, each unit of beamforming network is reasonably designed, which reduces the computational complexity of the algorithm and reduces the hardware resource overhead. At the same time, the single channel closed loop correction circuit design improves the consistency of the RF channel. Developed DBF network hardware platform and hardware-in-the-loop simulation system to verify the correctness of algorithm design. The algorithm proposed in this paper is of some reference to array signal processing with limited resources.