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Pages 73-76

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From page 73... ... • The terrestrial network authorized by FCC Order 20-48 will create unaccept able harmful interference for DoD missions. The mitigation techniques and other regulatory provision in FCC Order 20-48 are insufficient to protect national security missions. Read the entire page →
From page 74... ... The database will be helpful in ruling out Ligado's influence in harmful interference in many cases and help identify potentially interfering Ligado emitters, but attributing harmful interference as experienced by identified receivers to one or more Ligado emitters will be difficult. In the case of harmful interference with GPSs, the effectiveness and practicality of any of the foregoing potential mitigations depends on the type of receiver and the ap plication. Read the entire page →
From page 75... ... The remainder of this section's comments apply to DoD's use of Commercial Devices. First, potential harmful interference to GPS receivers from Ligado emitters in 9 See, for example, S Read the entire page →
From page 76... ... When asked by the committee if DoD could describe any engagement with Ligado to resolve any specific or general interference scenarios or cases since the April 22, 2020, Order and Authorization, DoD responded, "Per NTIA direction there has been no engagement with Ligado since the April 22, 2020, Order and Authorization pending resolution of the petition for reconsideration." The previous discussion addressed the potential harmful interference from Ligado emissions on DoD operations as it relates to GPS receivers. This analysis now turns to po tential harmful interference from Ligado's uplink emissions in the band between 1627.5 and 1637.5 MHz. Read the entire page →

From page 73...

... • The terrestrial network authorized by FCC Order 20-48 will create unaccept able harmful interference for DoD missions. The mitigation techniques and other regulatory provision in FCC Order 20-48 are insufficient to protect national security missions.

Read the entire page →

From page 74...

... The database will be helpful in ruling out Ligado's influence in harmful interference in many cases and help identify potentially interfering Ligado emitters, but attributing harmful interference as experienced by identified receivers to one or more Ligado emitters will be difficult. In the case of harmful interference with GPSs, the effectiveness and practicality of any of the foregoing potential mitigations depends on the type of receiver and the ap plication.

Read the entire page →

From page 75...

... The remainder of this section's comments apply to DoD's use of Commercial Devices. First, potential harmful interference to GPS receivers from Ligado emitters in 9 See, for example, S

Read the entire page →

From page 76...

... When asked by the committee if DoD could describe any engagement with Ligado to resolve any specific or general interference scenarios or cases since the April 22, 2020, Order and Authorization, DoD responded, "Per NTIA direction there has been no engagement with Ligado since the April 22, 2020, Order and Authorization pending resolution of the petition for reconsideration." The previous discussion addressed the potential harmful interference from Ligado emissions on DoD operations as it relates to GPS receivers. This analysis now turns to po tential harmful interference from Ligado's uplink emissions in the band between 1627.5 and 1637.5 MHz.

Read the entire page →

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