Channel capacity estimation in TDMS-based MIMO measurements

Time-division multiplexed switching (TDMS)-based multiple-input multiple-output (MIMO) channel sounders are widely used for wireless channel measurements due to their effective costs. However, measurement noise such as phase noise in the local oscillators as well as additive white Gaussian noise (AWGN) can result in significant errors in channel capacity estimates. This study analyzes the impact of phase noise and AWGN on channel capacity in TDMS-based MIMO measurements, with a channel capacity estimator presented that reduces the impact of noise on both the spatial multiplexing gain and on the power gain. Simulations demonstrate that the estimator consistently obtains the true capacity for various MIMO channel scenarios, even if only a limited number of observations are available.

[1]  Attaphongse Taparugssanagorn,et al.  Characteristics of Short-Term Phase Noise of MIMO Channel Sounding and Its Effect on Capacity Estimation , 2009, IEEE Transactions on Instrumentation and Measurement.

[2]  Fredrik Tufvesson,et al.  Measurement of keyhole effect in a wireless multiple-input multiple-output (MIMO) channel , 2003, IEEE Communications Letters.

[3]  Michael A. Jensen,et al.  A Low-Cost Open-Hardware Wideband Multiple-Input–Multiple-Output (MIMO) Wireless Channel Sounder , 2008, IEEE Transactions on Instrumentation and Measurement.

[4]  H. El-Sallabi,et al.  Reducing Impact of Phase Noise on Accuracy of Measured MIMO Channel Capacity , 2007, 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring.

[5]  H. Bolcskei,et al.  Impact of phase noise on MIMO channel measurement accuracy , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[6]  Thomas Kailath,et al.  Detection of signals by information theoretic criteria , 1985, IEEE Trans. Acoust. Speech Signal Process..

[7]  Alfred O. Hero,et al.  Detection of the Number of Signals Using the Benjamini-Hochberg Procedure , 2007, IEEE Transactions on Signal Processing.

[8]  Mérouane Debbah,et al.  Channel Capacity Estimation Using Free-Probability Theory , 2007, IEEE Transactions on Signal Processing.

[9]  Reinaldo A. Valenzuela,et al.  Effects of thermal noise on accuracy of measured BLAST capacities , 2001 .

[10]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[11]  Boaz Nadler,et al.  Nonparametric Detection of Signals by Information Theoretic Criteria: Performance Analysis and an Improved Estimator , 2010, IEEE Transactions on Signal Processing.

[12]  Y. Selen,et al.  Model-order selection: a review of information criterion rules , 2004, IEEE Signal Processing Magazine.

[13]  Donald C. Cox,et al.  Channel and capacity estimation errors , 2002, IEEE Communications Letters.

[14]  Ammar B. Kouki,et al.  On MIMO channel capacity, correlations, and keyholes: analysis of degenerate channels , 2002, IEEE Trans. Commun..

[15]  Jørgen Bach Andersen,et al.  Array gain and capacity for known random channels with multiple element arrays at both ends , 2000, IEEE Journal on Selected Areas in Communications.