Video-aware MIMO precoding with packet prioritization and unequal modulation

摘要: Video streaming over wireless networks can achieve large quality and capacity gains from transmission techniques that are aware of the video content. This paper proposes modifying conventional multiple-input multiple-output (MIMO) systems to realize these by introducing video-aware PHY layer decisions. Specifically, a new packet prioritization method is introduced splits data among spatial streams based on loss visibility per-stream SNRs. The objective maximize throughput weighted visibility, metric coined perceived throughput. globally-optimal splitting policy derived. Furthermore, unequal modulation per stream proposed visibility-based dropping optimized satisfy delay constraints. We derive vs. MIMO precoding prove gain averaged divided worst stream.