Automatic repeat request (ARQ) Break large files into packets FILE PKT PKT PKT Check received packets for errors Use a feedback channel to request retransmissions Retransmit packets containing errors acket Receive ACK
The signal suffers an attenuation loss l Received power PR= PT/L Received snr=E,/No, Eb=Pr/Rb Antennas are used to compensate for attenuation loss Capture as much of the signal as possible
Collaborate Document Management Plan and design up front Create a short model section for information content and order Create a layout template Create a document control system for revisions Accept individual responsibility and deadlines
Uniqueness of Satellite Manufacture Small production runs Extreme operational environments Limited repair/replace options after launch High product cost and importance High cost test environment Highly coupled designs minimize weight and maximize performance but yield high complexity
