Digital cross-correlation is central to many applications including but not limited to Digital\nImage Processing, Satellite Navigation and Remote Sensing. With recent advancements in digital\ntechnology, the computational demands of such applications have increased enormously. In this paper\nwe are presenting a high throughput digital cross correlator, capable of processing 1-bit digitized\nstream, at the rate of up to 2 GHz, simultaneously on 64 channels i.e., approximately 4 Trillion\ncorrelation and accumulation operations per second. In order to achieve higher throughput, we\nhave focused on frequency based partitioning of our design and tried to minimize and localize high\nfrequency operations. This correlator is designed for a Passive Millimeter Wave Imager intended for\nthe detection of contraband items concealed on human body. The goals are to increase the system\nbandwidth, achieve video rate imaging, improve sensitivity and reduce the size. Design methodology\nis detailed in subsequent sections, elaborating the techniques enabling high throughput. The design\nis verified for Xilinx Kintex UltraScale device in simulation and the implementation results are given\nin terms of device utilization and power consumption estimates. Our results show considerable\nimprovements in throughput as compared to our baseline design, while the correlator successfully\nmeets the functional requirements.
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