Techniques Based on Resource Allocation in Chunk Based OFDMA: A Survey

Abstract — The emerging demand for diverse data applications in next generation wireless networks entails both high data rate wireless connections and intelligent multiuser scheduling designs. Orthogonal frequency division multiple access is capable of delivering high speed connections in a multipath environment by dividing an entire channel into many orthogonal narrow band subcarriers and thus eliminating inter symbol interferences, which limits the available data rates. In this paper, we have investigated about resource allocation problem for the downlink of Orthogonal Frequency Division Multiple Access (OFDMA) wireless multicast systems. It is assumed that the Base Station (BS) consists of multiple antennas in a Distributed Antenna System (DAS) or Collected Antenna System (CAS), whereas each user is equipped with a single antenna., The allocation unit is a set of contiguous subcarriers (chunk) in conventional OFDMA systems. The aim of this investigation is to propose an efficient algorithm to maximize the total throughput with respect to total available power and average Bit Error Rate (BER) over a chunk