The Research And Implementation Of The M-GNSS Positioning Receiver

With Beidou-2navigation system providing regional navigation service and the ICDdocument of B1frequency point for Beidou-2released,domestic GNSS manufacturers arebound to face the challenges of their foreign counterparts.Faced with competition fromforeign GNSS manufacturers, GNSS terminal must launch differentiated products, in orderto take advantage of the Beidou terminal market.The existing GNSS receiver positioningonly by receiving a navigation satellite signal, can’t do positioning compensation by otherresources.In response to the deficiencies of the existing GNSS receiver,the M-GNSSpositioning receiver device is designed in this paper.It is the GNSS receiver device havingmulti-GNSS Integrated Positioning and cloud positioning compensation function. Theresearch the M-GNSS positioning device in this paper is detailed as the following aspects:1. The composition of the GNSS satellite signals, the working principle of GNSSsatellite navigation system, the hardware&software architecture and the working principleof the apparatus the typical GNSS positioning receiver is studied, then the demand ofM-GNSS positioning receiver device is analyzed.2. A further analysis of the demand of M-GNSS positioning receiver device is doneincluding the four core modules, which names RF modules, correlator modules, positioningsolver modules and communication management module. A Research with each module’sexisting technologies or solutions work principle, structure, advantages and disadvantagesand feasibility etc is done before the design idea of the core modules is given. The finaldesign of the overall architecture of M-GNSS positioning receiver device is provided, usingDSP+FPGA+MCU scheme.3. On the basis of the overall architecture of the M-GNSS positioning receiver device,the RF module of the receiving apparatus, the positioning of the M-GNSS FPGA relevantmodules, DSP positioning solver module and the MCU communication managementmodule is detailedly designed from hardware and software functions.4. Test environment is built, the function of RF receiver module of the M-GNSSpositioning receiver device, channel module, positioning solver modules andcommunication management module is tested and analyzed. The result of the GNSSpositioning receiver device is analyzed.The output protocal of the M-GNSS positioningreceiver device is detailed.