ptt3i
2010-11-07, 12:42 AM
Adaptive Power Control for Space Communications
his paper investigates the implementation of power control techniques for crosslinks communications during a rendezvous scenario of the crew exploration vehicle (CEV) and the lunar surface access module (LSAM). During the rendezvous, NASA requires that the CEV supports two communication links: space-to-ground and crosslink simultaneously. The crosslink will generate excess interference to the space-to-ground link as the distances between the two vehicles decreases, if the output power is fixed and optimized for the worst-case link analysis at the maximum distance range. As a result, power control is required to maintain the optimal power level for the crosslink without interfering with the space-to-ground link. A proof-of-concept will be described and implemented within Goddard Space Flight Center (GSFC) Communications, Standard, and Technology Lab (CSTL)
his paper investigates the implementation of power control techniques for crosslinks communications during a rendezvous scenario of the crew exploration vehicle (CEV) and the lunar surface access module (LSAM). During the rendezvous, NASA requires that the CEV supports two communication links: space-to-ground and crosslink simultaneously. The crosslink will generate excess interference to the space-to-ground link as the distances between the two vehicles decreases, if the output power is fixed and optimized for the worst-case link analysis at the maximum distance range. As a result, power control is required to maintain the optimal power level for the crosslink without interfering with the space-to-ground link. A proof-of-concept will be described and implemented within Goddard Space Flight Center (GSFC) Communications, Standard, and Technology Lab (CSTL)