A High-Speed Special Purpose Processor for Underground Object Detection


IEICE TRANSACTIONS on Electronics   Vol.E75-C   No.10   pp.1250-1258
Publication Date: 1992/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microprocessors)
Category: Application Specific Processors
FFT,  VLSI,  underground objects,  pulse radar,  

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Most communication cables are laid underground. In order to make construction and maintenance works easier, systems to detect buried objects have already been developed using the electromagnetic pulse radar technique. However, existing detection systems are not really practical due to their rather limited processing speed. To achieve sufficient processing speed, two dedicated custom FFT LSI's are designed and realized with 0.8 µm-CMOS technology. The two chips have an equivalent processing capacity of 200 MOPS. An efficietn hardware algorithm for address generation and 2 word parallel processing are introduced. In addition, an enhanced system organization is developed together with an improved pattern recognition scheme and aperture synthesis hardware. The new processor executes a FFT/parameter extraction operation in 4 seconds and aperture synthesis in 1 second. This speed meets the design target, and a real time detection system for underground objects becomes possible.