Multidimensional Resource Allocation Strategy for High-Speed Railway MIMO-OFDM System
With the wide deployment of high-speed railway at more than 300 kilometers per hour, providing various services effectively for users in the train becomes both practical demand and interesting challenge for wireless communication. Resource allocation problem in high-speed railway communication system is one of the key issues to improve the efficiency of resource utilization. In this paper, the authors propose a multidimensional resource allocation strategy for high-speed railway downlink Orthogonal Frequency-Division Multiplexing (OFDM) system with Multiple Input Multiple-Output (MIMO) antennas. Sub-carrier, antenna, time slot, and power are considered jointly, which is modeled as a nonlinear integer programming problem.