Part of the spatial-diversity roadmap #127. Depends on #A, #H. Speculative.
Goal
Assess whether transmit beam-steering is feasible for a moving broadcast
source (the drone), where coherent multi-chain combining could focus energy toward
the ground station — the strongest form of the #H energy lever (EIRP per PA-watt
scales with N).
The hard part
Beamforming needs direction/CSI, and a one-way video broadcast has no per-packet
feedback. The adaptive-link return channel gives slow/coarse direction at best, and
the source is moving. This issue is a feasibility study, explicitly downstream
of the feedback-free diversity techniques (#C–#E), not a commitment to implement.
Scope
- Characterize what direction/CSI quality is achievable from the existing return
channel and airframe attitude, and how stale it is for a moving platform.
- Model the achievable beam-steer gain vs pointing error and update rate.
- Decide go / no-go vs simply lighting up more chains for (feedback-free) diversity
at the same baseline cost.
Part of the spatial-diversity roadmap #127. Depends on #A, #H. Speculative.
Goal
Assess whether transmit beam-steering is feasible for a moving broadcast
source (the drone), where coherent multi-chain combining could focus energy toward
the ground station — the strongest form of the #H energy lever (EIRP per PA-watt
scales with N).
The hard part
Beamforming needs direction/CSI, and a one-way video broadcast has no per-packet
feedback. The adaptive-link return channel gives slow/coarse direction at best, and
the source is moving. This issue is a feasibility study, explicitly downstream
of the feedback-free diversity techniques (#C–#E), not a commitment to implement.
Scope
channel and airframe attitude, and how stale it is for a moving platform.
at the same baseline cost.