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In this paper, a new Rayleigh VANET model based on sum-of-sinusoids method (SoS) is presented. Some important statistical properties, such as variance of autocorrelation of the complex envelope and autocorrelation of the squared envelope are derived in detail. Furthermore, for above derived statistical properties, we give an detailed analysis about them by comparing their closeness between simulation...
In this paper, we have analyzed the performance of diversity technologies using experimental data recorded from mobile underwater channel environments in order to analyze the usability of MIMO techniques in underwater channel environments. After analyzing the experimental data we found out that high diversity gain should not be expected when using a stationary transmitter with a stationary array of...
This paper presents field experiments on open-loop precoding multiple input multiple output (MIMO) using a testbed targeting International Mobile Telecommunication - Advanced (IMT-Advanced) systems. Open-loop MIMO is realized by applying Rotational OFDM (R-OFDM) to MIMO transmission. MIMO R-OFDM is more robust with respect to correlated channels than conventional open-loop MIMO-OFDM as was shown by...
A game theoretic approach is used to derive the optimal decentralized power allocation (PA) in fast fading multiple access channels where the transmitters and receiver are equipped with multiple antennas. The players (the mobile terminals) are free to choose their PA in order to maximize their individual transmission rates (in particular they can ignore some specified centralized policies). A simple...
In this paper, a new wideband multiple-input multiple-output (MIMO) fading channel model for vehicle-to-vehicle (V2V) communications is proposed. The MIMO V2V channel model, called for brevity T-model, captures the propagation effects that occur if vehicles move towards a junction with a side road and corner buildings. The starting point for the derivation of the T-model is a new geometric T-junction...
This paper presents results from a measurement campaign that was conducted to characterize the multiple input multiple output (MIMO) channel characteristics in a low-rise urban environment in the military UHF frequency band. Data were collected in Baltimore, Maryland using a 2times3 MIMO testbed in June 2007. Testing consisted of transmitting orthogonal channel probes from a stationary transmit test...
A channel sounder for wideband car-to-car 2 x 2 multiple input multiple output (MIMO) radio channel measurements at 5.7 GHz with a bandwidth of 1 GHz has been developed. With the use of highly accurate synchronization units a high degree of coherence was achieved. The HHI-channel-sounder has been used in a measurement campaign in typical urban traffic scenarios in Berlin, Germany. This paper presents...
This paper presents a multiple-input multiple-output (MIMO) space-time geometrical channel model with hyperbolically distributed scatterers for a macrocell mobile environment. The model is based on a one-ring scattering assumption. This MIMO model provides statistics of the time of arrival (TOA) and direction of arrival (DOA). It is assumed that there is no line of sight (LOS) between the transmitter...
This paper addresses adaptive channel estimation for time-varying mobile wireless channels with nonstationary statistics. We presents a reduced complexity adaptive channel estimator based on a set membership filtering approach known as the Optimal Bounding Ellipsoid (OBE) algorithm. To exploit time and frequency domain correlation properties of the channel in an efficient low-complexity way, we allow...
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