研究gps弱信号定位跟踪，是很难得的文献，有较高的参考价值-The weak GPS signal-processing work described here was part of the development of an innovative GPS tag – TrackTagTM

The MST717 is a highquality ASIC for NTSC / P AL car TV application. It receives analog NTSC / P AL CVBS and S-V ideo inputs from TV tuners, DVD or VCR sources, including weak and distorted signals, as well as analog RGB input from GPS systems.