A method for evaluating MPSK performance using a (M/2)PSK signal set

As data rate demands on existing satellite systems increase, the need to evaluate more bandwidth efficient modulation schemes such as M-ary phase Shift Keying (MPSK) becomes important. However, the unavailability of higher order modems operational at higher data rates and the construction of such a complex device for testing purposes can make evaluation difficult. In support of NASA grant NAG 5-1491, New Mexico State University has developed a method of evaluating the performance of 8PSK in a satellite channel using a QPSK signal set. This paper will discuss this technique and will generalize the results to the use of any (M/2)PSK signal set to evaluate MPSK modulation. Verification by both computer simulation and hardware implementation will also be discussed

The Sky's the Limit: Re-lightable Outdoor Scenes via a Sky-pixel Constrained Illumination Prior and Outside-In Visibility

Inverse rendering of outdoor scenes from unconstrained image collections is a challenging task, particularly illumination/albedo ambiguities and occlusion of the illumination environment (shadowing) caused by geometry. However, there are many cues in an image that can aid in the disentanglement of geometry, albedo and shadows. We exploit the fact that any sky pixel provides a direct measurement of distant lighting in the corresponding direction and, via a neural illumination prior, a statistical cue as to the remaining illumination environment. We also introduce a novel `outside-in' method for computing differentiable sky visibility based on a neural directional distance function. This is efficient and can be trained in parallel with the neural scene representation, allowing gradients from appearance loss to flow from shadows to influence estimation of illumination and geometry. Our method estimates high-quality albedo, geometry, illumination and sky visibility, achieving state-of-the-art results on the NeRF-OSR relighting benchmark. Our code and models can be found https://github.com/JADGardner/neusk

Security of infantile attachment as assessed in the strange situation: its study and biological intrepretation

We study the Ainsworth \u27Strange Situation\u27 procedure to assess attachment between infant and parent, and intrepret individual variation in terms of modern human behavioral ecology ( sociobiology