A 1.5-GHz 6.144T Correlations/s 64 x 64 Cross-Correlator With 128 Integrated ADCs for Real-Time Synthetic Aperture Imaging

作者：Bell John^*; Knag Phil; Sun Shuanghong; Lim Yong; Chen Thomas; Fredenburg Jeffrey; Chen Chia Hsiang; Zhai Chunyang; Rocca Aaron; Collins Nicholas; Tamez Andres; Pernillo Jorge A; Correll Justin M; Tanner Alan B; Zhang Zhengya; Flynn Michael P

来源：IEEE Journal of Solid-State Circuits, 2017, 52(5): 1450-1457.

DOI：10.1109/JSSC.2017.2660059

• Circuits
• Mixed analog digital integrated circuits
• Synthetic aperture radar
• System-on-chip

A 65-nm CMOS, 18-mm(2), 1.5-GHz 64 x 64 cross-correlator with 128 on-chip analog-to-digital converters (ADCs) enables real-time synthetic aperture radiometric imaging. This brief enables high-resolution synthetic aperture radiometry by greatly improving the integration and energy efficiency of the mixed-signal baseband cross-correlator. The design supports analog-in and digital correlation out, removing approximately 5 W of power that would otherwise be needed for I/O between the ADCs and the digital correlation core. The prototype 6.144T correlation/s 1.5 Gsamples/s 64 x 64 correlator is designed for satellite-based radiometric imaging of water in the atmosphere. Massive parallelism together with an optimized correlation scheme leads to a measured energy consumption of only 0.35 pJ/correlation/cycle. A correlation efficiency greater than 90% is achieved for input signal levels greater than -30 dBm.

• 出版日期2017-5