GPS Receiver Equipment Software Development And Implementation

Global Position System (GPS) is a new-generation precise positioning system. It has some advantages that others don't have, such as high precision, all-weather suitability, and total global coverage. GPS is widely used in both military and civil field. In this case, GPS receiver as one of important part of GPS is developing rapidly and new technology upgrade rapidly.The thesis is based on the background of developing the GPS receiver equipment. The development and the software implementation of the receiver, especially on the channel, are presented. The channel that is the core of the receiver, mainly completes acquisition and tracking, bit/frame synchronization, which are directly related to the receiver. The software is the key to the GPS receiver, because it accomplishes the position computation. The software is running on the TMS320C6713.In the thesis ,the constitutes of GPS constellation ,WGS-84 coordination system for GPS positioning, and universal GPS timing system are precisely introduced .Then it describes the overall design of receiver software and the core modules of software realize on DSP. Firstly, we assign the software/hardware resource of system and design the software module structure, the control of the real-time tasks and the data flow graph. Then, the significant modules are respectively described. Several key technologies applied in user receiver equipment are researched, including signal acquisition and tracking, signal synchronization, etc. At the last, the equipment is verified by using general test equipment. The test results indicate that the user receiver has the functions of acquisition and tracking, bit/frame synchronization and navigation solution. And the receiver has satisfied the demand of the design.