LORAN Receiver Structure for Cross Rate Interference Cancellation

摘要

With the recent mid-continent expansion of LORAN in North America, the planned future expansion in Europe, and with LORAN and Pulse-8 sharing the same band in Europe, the dominant source of interference frequently is cross rate LORAN signals. Recent advances in digital signal processing technology have now made it possible to implement in real time digital filters with notches at all of the cross rate harmonics. The authors' filter is implemented on a Spectrum TMS320C30 based board installed in an MS-DOS computer. This is the same hardware the authors use to implement the Russian VLF/Omega and DGPS MSK receivers. As in those cases, the hardware system is an excellent test platform for basic research and concept evaluation, and is not an 'end product'.