Testing GPS systems and devices with M-Code

A major component of GPS modernization, M-Code offers further improvement to the anti-jamming and secure access of radio-navigation signals to the armed forces. M-Code is required for all US DOD applications after FY17. This paper provides a brief update on the introduction of M-code as the replacement for the previous generation of encrypted GPS known as SAASM. It then describes testing M-Code compatible systems by RF simulation for integrators and testers of navigation systems to ensure a successful transition to M-Code receivers.