In global navigation satellite system (GNSS), with the increase in the number of observational satellites comes an increase in the probability of simultaneous multiple-satellite faults. Therefore, the multiple-satellite faults should be taken into account in receiver autonomous integrity monitoring (RAIM). The approach of fault detection is simpler than that of fault exclusion and the fault detection rate (FDR) is higher than the fault exclusion rate (FER), considering the features of satellite navigation system, a novel multiple-satellite faults exclusion method was proposed based on fault detection, named random search method (RSM). The binary code for observational satellites was employed in the new method. Firstly, the initial fault free constellation was obtained by random initialization in RSM. And the final fault free constellation with the largest number of observational satellites was obtained by the search of unselected satellites gradually based on the initialization result. And so, the function of fault exclusion was realized. Simulation results show that, in most cases, the FER of RSM is more than 99%. And the new method has the capable of fault exclusion either for single satellite fault or for simultaneous multiple-satellite faults, and it can effectively meet the requirement of autonomous integrity of GNSS.
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