Abstract
The BeiDou Navigation Satellite System (BDS) is currently building its third phase (BDS-3), which will provide services to users around the world. In addition to backward compatibility with BDS-2, BDS-3 satellites are equipped with the B1C and B2 interoperable signals for compatibility with GPS and Galileo systems. To evaluate performance and optimize processing methods, we designed and implemented a real-time software receiver with the ability to process all BDS-3 signals in parallel. A complete description of all signal processing aspects is given. To reduce the reliance on high-performance hardware while maintaining the independent analysis capabilities of acquisition performance in real-time software receivers, a B1I-aided acquisition method for reducing the search space of other signals from the same satellite is applied. An unambiguous tracking method is proposed to solve the ambiguity problem of the Quadrature Multiplexed Binary Offset Carrier (QMBOC) signal that can be used for matching reception of the pilot component of the B1C signal.
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