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We present the theoretical development of a simple Receiver Autonomous Integrity Monitoring (RAIM) algorithm by modifying a Conventional Snapshot RAIM algorithm and its implementation on DSP platform. Integrity describes a navigation system capability to be responsible for well-timed warnings to users as soon as the satellite or whole constellation should not be used for navigation. RAIM algorithms detect, identify those satellite anomalies and failures and calculates the Protection Level (PL). PL is the 1east measurable position error along with the certain possibilities of missed detection and a false alert. The developed algorithm uses conventional snapshot based RAIM algorithm with some changes in the threshold measurements for the protection level calculations, which is then compared with a tested predefined threshold to provide precise positioning and a high level of integrity due to setting a very tight fault detection threshold and Protection Level. Final1y, the developed algorithm is implemented on DSP TMS320C641XX keeping the computational/processing requirements for RAIM Algorithm as low as possible and simulations are performed to compare the results.