US Patent Issued to NEC on June 30 for "Multi-band DAS with enhanced SNR, increased sampling rate and minimized inter-location interference" (California, New Jersey Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,369, issued on June 30, was assigned to NEC Corp. (Tokyo).

"Multi-band DAS with enhanced SNR, increased sampling rate and minimized inter-location interference" was invented by Junqiang Hu (Davis, Calif.) and Yue-Kai Huang (Princeton, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A distributed acoustic sensing (DAS) system that collects many frequency bands within the system (in particular, analog to digital converter, or ADC) bandwidth. The bands are divided into multiple groups, and within each group, the inter-band interference from band i to band j is at least l1 dB lower than the power of band j. For different groups, the inter-band inter...