The Study, Based On Self-study Related To The Onboard Gps Receiver Design

The Missile-borne GPS receiver is the one of the most important parts of guided cartridge. Compare with the normal GPS receiver, the Missile-borne GPS has some special requirements need to accomplished, such as the high overload resistance and dynamic adaptation, quick-position which are difficult to design. The assignment will discuss the difficult points of design and search for the realized solutions. In addition, it is associated with the design measurement of normal receiver, discovering the design measurement of the Missile-borne GPS which base on the self-researched correlator.The assignment describes two aspects of design of the GPS receiver. The one of the aspects is the hardware design which is including the schematic design and PCB design, and another is software design which is including the design of fast acquisition algorithm, carrier tracking loop and code tracking loop design, navigation desolation research. In addition, this assignment reports the results of the performance of the receiver. In order to achieve the high resistance of overload, it shoose the suitable components and parts for the receiver and arrange the PCB reliable, moreover, it is canned the receiver as a whole.To adapt the High dynamic environment, it adopts the carrier tracking loop model which is mixed the second-order FLL and third-order PLL and uses the phase-locked loop independent and normalize code discriminator to increase the robustness of the tracking loop. To reduce the time of GPS first location. it develop GPS sign's fast-acquisition based on the FFT, which Realize the carrier wave parallel processing and the code serial processing. On this basis, it is through a series of experiments, including drop hammer experiment, high-speed rotating floor experiment and dynamic simulation experiment to test the performance of the receiver.The assignment achieves the result of experiments about the Missile-borne GPS receiver. It is shown that the receiver can afford the max attack which is up to 3000g axial direction overloads attack and more than 10000r/s radial and tangential overload. Moreover, the study has shown the tracking loop is working stable in the condition of thirty-eight g uniformly accelerated motion. Finally, the Fast Acquisition Algorithm is reliable. Under the pre-assemble ephemeris condition, the first locate within ten second.