An antenna-channel-antenna modeling methodology for estimating MIMO system performance

Performance evaluation of an IEEE 802.11n Access Point antenna system

“…where gi R and gJ are the active E-field radiation patterns of the i th receive andjth transmit antennas obtained from simulations or measurements, RT is a complex dyadic representing the polarization and path loss transfer function for a given ray propagating through the channel, and (¢JR' OR) and (¢JT' 0T) are the local spherical coordinate angles at the receiver and transmitter, respectively [4,5]. In the frequency domain, the contributions from the individual rays are vectorially added to obtain the resultant channel matrix.…”

“…The modeling of the MIMO system follows the methodology described in [4,5]. The propagation environment is modeled as clusters of rays leaving the transmitter and landing on the receiver, in a manner similar to those described in previous literature [1 -5].…”

“…Typically, these methods involve the characterization of the propagation environment and account for the effect of the antennas by means of a correlation matrix based on the envelope correlation coefficient between the antennas, or create an approximate transfer function of the communication link by coupling the antenna parameters to the channel models [1][2][3]. In this article, the performance of a 3-port MIMO antenna system for an 802.IIn AP device is analyzed by combining an electromagnetics-exact representation of the antennas and a plane wave decomposition for the propagation environment [4,5]. The antenna performance is simulated using Finite Element Method (FEM) tools.…”

“…In fact, it is more appropriate to consider and compare the performance of such systems at the capacity or data rate levels. Several methods have been proposed for the characterization of MIMO systems [1][2][3][4]. Typically, these methods involve the characterization of the propagation environment and account for the effect of the antennas by means of a correlation matrix based on the envelope correlation coefficient between the antennas, or create an approximate transfer function of the communication link by coupling the antenna parameters to the channel models [1][2][3].…”