Effects of applying realistic channel conditions on performance prediction of UCA-VBLAST-MIMO systems
نویسنده
چکیده
as: Mang ng Saud Abstract Recently, many realistic spatially and temporally clustered channel models were developed to be applied in the simulations of multiple input multiple output (MIMO) systems. IEEE 802.11n standard channel model includes spatio-temporal fading correlation effects and accounts for six various real propagation profiles. These profiles represent variety of propagation scenarios for indoor environments. This paper presents the impact of applying various channel model conditions on the link performance of Vertical Bell Laboratories Space-Time detection (VBLAST-MIMO) systems that employ Uniform Circular array (UCA). Also, capacity and channel estimation accuracy for this system are investigated under different channel conditions. The effect of varying the SNR on the Channel State Information (CSI) error and capacity for UCAMIMO systems are included. Training based techniques such as Least Square (LS), scaled least square (SLS) and minimum mean square error (MMSE) methods and relaxed MMSE (RMMSE) are considered for estimating channel properties. It is found that the presence of spatial correlation can help to improve the Channel estimation accuracy at low SNR for UCA-VBLAST-MIMO system under different spatial correlation conditions. a 2012 King Saud University. Production and hosting by Elsevier B.V. All rights reserved.
منابع مشابه
Effect of Fading Correlation on the Performance of Spatial Multiplexed MIMO systems with circular antennas
In this paper the performance of the Vertical Bell Laboratories Space-Time (V-BLAST) detection that is used in spatial multiplexed MIMO system is investigated when fading correlation effects is included. Simulations of MIMO systems are developed employing accurate stochastic spatial channel model for both the uniform linear array (ULA) and uniform circular array (UCA) geometries. Systems applyi...
متن کاملAn Adaptive Channel Model for VBLAST in Vehicular Networks
The wireless transmission environment in vehicular ad hoc systems varies from line of sight with few surroundings to rich Rayleigh fading. An efficient communication system must adapt itself to these diverse conditions. Multiple antenna systems are known to provide superior performance compared to single antenna systems in terms of capacity and reliability. The correlation between the antennas ...
متن کاملFRFD MIMO Systems: Precoded V-BLAST with Limited Feedback Versus Non-orthogonal STBC MIMO
Full-rate (FR) and full-diversity (FD) are attractive features in MIMO systems. We refer to systems which achieve both FR and FD simultaneously as FRFD systems. Nonorthogonal STBCs can achieve FRFD without feedback, but their ML decoding complexities are high. V-BLAST without precoding achieves FR but not FD. FRFD can be achieved in VBLAST through precoding given full channel state information ...
متن کاملSemi-blind Channel Estimation and Iterative Detection for MIMO-OFDM Systems
The combination of MIMO and OFDM techniques has been recently explored for providing high speed data communication over fading dispersive channels. Bit interleaved coded modulation (BICM) architecture with iterative detection and decoding techniques (IDD) at the receiver has been found to attain good performance (close to Turbo MIMO) with moderate complexity. The scheme however relies on the av...
متن کاملLow complexity MIMO detection algorithm
The multi antenna systems offer a much larger channel capacity than the traditional single antenna systems. The price which has to be extra paid is detection complexity. In this paper we examine performance of the low complexity algorithm called zero forcing–maximum likelihood (ZFML) [5]. We find this algorithm appropriate for MIMO (Multiple Input Multiple Output) systems using more receive tha...
متن کامل