Investigation on Dynamic Resource Allocation for Multiple Antenna OFDM Based System

Abstract

In this paper we propose a transceiver structure to reduce the interference between transmitting subcarriers and receiving subcarriers. Its performance in terms of signal to interference and noise ratio (SINR) is evaluated by both analysis and simulation and is incorporated into a recently proposed cooperation strategy for Orthogonal Frequency Division Multiple Access (OFDMA) systems to examine its performance under the realistic structure. The conventional Discrete Fourier Transform (DFT)-based approach will cause energy leakage in multipath channel with non-sample-spaced time delays. The improved DFT-based channel estimation method uses symmetric property to extend the LS estimate in frequency domain, and calculates the changing rate of the leakage energy, and selects useful paths by the