Abstract
Discussed is a timing emulation and operating system which predicts loading for microprocessors and enables efficient generation of software found in such applications as the Global Positioning System. The timing emulator is applied to two classes of user equipment, a conventional fast-multiplexed design and a fully integrated processor featuring continuous state feedback into the spread-spectrum demodulation and tracking loops. Timing data are developed for five representative microprocessors ranging from 818 to 32132 register/bus widths. The advanced integrated processor requires augmentation of the 32132 processor with a math co-processor. The emulator is used to develop speed requirements on the co-processor. Lastly, the software development system is described. This contains a multi-tasking operating system and matrix library written in the language “C” which may be easily adapted to a range of radio-navigation problems.
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