Simulating MIMO techniques in a reverberation chamber

Abstract

Abstract-We present a general method for over-the-air test of antenna setups and/or post-processing algorithms used in advanced transmission schemes. The method utilizes a reverberation chamber to simulate various levels of multipath in the propagation environment. Multipath is essential for correctly estimating the performance of multiple-antenna systems. Our test set-up enables measurement of data throughput with standard laboratory instruments. With this test set-up, antenna setups can be studied while isolated from any specific system hardware implementation.Index Terms-antenna array, antenna diversity, beam forming, bit error rate, multipath, multiple-input, multiple-output wireless system, reverberation chamber, wireless system.

MRC Diversity and MIMO Capacity Evaluations of Multi-Port Antennas Using Reverberation Chamber and Anechoic Chamber

“…From the antenna point of view, both diversity gain [3] and MIMO capacity [6] are appropriate parameters for multi-port antenna characterizations in multipath environments. Due to the measurement repeatability and convenience of the reverberation chamber, it has become a popular multipath emulator [10]- [12] for measurements of multi-port antennas [13]- [18] and active MIMO terminal [19]- [21]. The reverberation chamber emulates a rich isotropic multipath (RIMP) environment, being a contrast to the well known pure Line-Of-Sight (LOS) in an anechoic environment [20].…”

Investigation of the Effect of Noise Correlations on Diversity Gains and Capacities of Multiport Antennas Using Reverberation Chamber

“…Unlike that in [16] where an open-circuit channel concept was used, in the paper, we deal with composite channels including overall antenna effects (i.e., spatial correlation, mutual coupling, and antenna efficiencies) directly, which are more convenient for measured channels [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Provided that mutual coupling effects can be included correctly using antenna impedance matrices and with the right channel normalization, the open-circuit channel approach gives the same result as the composite channel (including overall antenna effect) approach [4].…”

“…However, the full radiation pattern measurement is also time-consuming. As an alternative, the reverberation chamber is getting more and more popularity for MIMO terminal characterization (and even system tests) due to its fast and repeatable measurements [6][7][8][9][10][11][12][13][14]. A reverberation chamber is basically a large metal cavity with mode-stirrers inside to create a Rayleigh-fading environment [15].…”

Improved MIMO Throughput With Inverse Power Allocation—Study Using USRP Measurement in Reverberation Chamber

“…M EASUREMENT-BASED characterizations of multiple-input-multiple-output (MIMO) systems are essential for the development of MIMO devices. Being a convenient tool for emulating multipath environments, the reverberation chamber (RC) has been used for various over-the-air (OTA) tests of MIMO systems [1]- [6]. In particular, simple yet accurate throughput models have been presented in [1]- [3], which have been validated by measurements of Long Term Evolution (LTE) systems in an RC.…”