论文标题
MWA绑定阵列处理III：通过多相合成过滤器的微秒时间分辨率
MWA tied-array processing III: Microsecond time resolution via a polyphase synthesis filter
论文作者
论文摘要
描述了Murchison广场阵列（MWA）的新的高时间分辨率观察模式，从而实现了最高偏振阵列的带宽，并且时间分辨率为〜0.8 $μ$ s。此模式利用多相合成过滤器来“撤消”标准MWA电压捕获系统（VCS）观察模式的多相分析滤波阶段。识别和量化了高时间分辨率数据重建的潜在误差源，而对于典型的噪声主导的样本，背靠背系统引起的S/N损失不超过-0.65 dB。通过观察三个具有已知结构的脉冲星，在微秒时尺度上进行了进一步验证。
A new high time resolution observing mode for the Murchison Widefield Array (MWA) is described, enabling full polarimetric observations with up to 30.72 MHz of bandwidth and a time resolution of ~0.8 $μ$s. This mode makes use of a polyphase synthesis filter to "undo" the polyphase analysis filter stage of the standard MWA's Voltage Capture System (VCS) observing mode. Sources of potential error in the reconstruction of the high time resolution data are identified and quantified, with the S/N loss induced by the back-to-back system not exceeding -0.65 dB for typical noise-dominated samples. The system is further verified by observing three pulsars with known structure on microsecond timescales.
