一种可扩展的混合FPGA/GPU FX关联函数
A Scalable Hybrid FPGA/GPU FX Correlator
摘要：
射电天文成像阵列包括大量的天线，O（10^2-10^3）已经提出了一个信号处理的挑战，因为需要O（N^2）交叉相关的信号从每个天线和必要的信号路由。这激发了分组化关联函数架构的实现，该架构将现场可编程门阵列（FPGA）应用于将时域转换为频域数据的O（N）“F级”，并且将图形处理单元（GPU）应用于执行每个天线的频谱之间的外积的O（N ^2）“X级”。该设计可容易地扩展到至少O（10^3）个天线。给出了外场试验中获得的条纹、能见度幅值和天空图像结果。
英文摘要：
Radio astronomical imaging arrays comprising large numbers of antennas, O(10^2-10^3) have posed a signal processing challenge because of the required O(N^2) cross correlation of signals from each antenna and requisite signal routing. This motivated the implementation of a Packetized Correlator architecture that applies Field Programmable Gate Arrays (FPGAs) to the O(N) "F-stage" transforming time domain to frequency domain data, and Graphics Processing Units (GPUs) to the O(N^2) "X-stage" performing an outer product among spectra for each antenna. The design is readily scalable to at least O(10^3) antennas. Fringes, visibility amplitudes and sky image results obtained during field testing are presented.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
