Nyquist pulse shaping criterion for two-dimensional systems

Abstract

We present Nyquist pulse shaping conditions for twodimensional (2-D) digital communication systems to be free from inter-symbol interference, for general regular sampling grids. We provide examples of 2-D pulse functions satisfying these Nyquist conditions. In particular, we show that a family of 2-D pulse functions that we construct as separable pulse functions from one-dimensional Nyquist-1 pulse functions obey the 2-D Nyquist criterion and moreover include the one with minimum support area in the frequency domain.

Logistics Pure Electric Vehicle Routing Based on GA-PSO Algorithm

“…In the face of the increasingly serious energy and environmental problems, the vigorous development of electric vehicles has become an important means of the "double carbon" strategy, combined with the current good prospects of the logistics industry, the application of electric vehicles to logistics transport has great practical significance. Most of the research on traditional vehicles is to consider reducing energy consumption, mainly from two directions: optimization of path and optimization of speed [1].With the great development of transportation electrification, the path planning problem of electric vehicles has been gradually attracted attention, and increasing scholars have started to research the joint optimization problem between grid and transportation network [2].Reference [3] presents the electric vehicles path optimization problem under time-sharing tariff. Reference [4] focused on the coupling relationship between the electric power system and electric vehicle fleet and customer demand, and carried out the joint optimization of the system.…”