A signaling technique for Emergency Position Indicating Radio Beacons (EPIRBs) using FSK modulation, with detection employing a bank of narrow-band filters, was designed and implemented by the Federal Republic of Germany for ESA tests with the ATS-6 satellite. An alternative signaling scheme using spread-spectrum pseudo-noise (PN) modulation with phase-locked loop demodulation and correlation detection was felt to give improved performance in a multiple EPIRB environment. This report presents a description and comparative analysis of the two designs.
The Coast Guard operates a diverse complement of servicing vessels to service aids to navigation. Of these, the fleet of 28 WLB's (seagoing buoy tende...
The Federal Highway Administration (FHWA) within the U.S. Department of Transportation has been using its cooperative driving automation (CDA) program...
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