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Signal Acquisition Techniques for Receiving Arrays of Large-Aperture Antennas

机译:接收大口径天线阵列的信号采集技术

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This paper considers the signal phase acquisition problem for arrays of large-aperture steerable antennas. In particular, long-range signal acquisition is considered for those cases in which the signal-to-noise ratio in each antenna-receiver channel is too low to permit signal phase-lock in each individual receiver. Techniques are discussed which promise to extend the array acquisition sensitivity toward that of an equivalent-area single-aperture antenna. Several acquisition methods are analyzed mathematically and an approximate minimum power threshold estimated for each technique. A numerical comparison between the acquisition techniques for various assumed atmospheric conditions is presented which indicates the limitations on array sensitivity imposed by both the transmission medium and the acquisition technique.
机译:本文考虑了大口径可控天线阵列的信号相位捕获问题。特别是,对于每个天线接收器通道中的信噪比太低而无法在每个单独的接收器中进行信号锁相的情况,考虑使用远程信号采集。讨论了有望将阵列采集灵敏度扩展到等效面积单孔径天线的技术的技术。对几种采集方法进行了数学分析,并估算了每种技术的近似最小功率阈值。给出了各种假定的大气条件下的采集技术之间的数值比较,这表明传输介质和采集技术对阵列灵敏度的限制。

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