Abstract:

This paper explores the Kinhood System (BDS-CDRadio) generated by a cross-domain technical innovation of the symbiotic FM data broadcasting technology (CDRadio) and BeiDou Satellite Navigation System (BDS).The system uses CDRadio broadcast technology to transmit differential correction data of GNSS.With a typical information sharing nature,it has no user scale limits,no concurrency constraints that normally happened in a communication system,and makes a short time-delay which is stable and reliable.The Kinhood transmitting section basically shares original radio broadcast facilities with a small input but wide coverage,which provides extremely low cost,high precision and real-time services of GNSS for massive numbers of receivers.The top third-party authorized tests by Academy of Broadcasting Planning and National Geomatics Center of China prove that:the Kinhood symbiotic digital broadcast keeps the analog FM signal quality in line with the national FM standard,and the digital signal coverage is same as that of analog FM signal at the digital-analog power ratio of -20 dB.The Kinhood System has ideal ground-based augmentation results,especially in the high dynamic scenarios,differential correction data receptions from the radio broadcast enjoy higher stability than the mobile communication transmission.

Key words: symbiotic FM data broadcasting, BeiDou satellite navigation, Kinhood system, ground-based augmentation, public precision positioning