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Spatial Modulation (SM) is a recently proposed joint coding and modulation scheme for Multiple-Input-Multiple-Output (MIMO) wireless systems, which is receiving a growing interest. SM offers a low-complexity alternative to the design of MIMO wireless systems, which avoids multiple Radio Frequency (RF) chains at the transmitter and high-complexity interference cancellation algorithms at the receiver,...
In this paper, we present a single-chip design for the accelerated verification of multiple-input multiple-output (MIMO) wireless communication systems. Our design integrates the data source, MIMO transmitter, multipath fading channel, MIMO receiver, data sink and error performance measurement on a single chip for prototyping and verification at hardware speeds. The implemented baseband fading channel...
This paper presents computationally efficient channel models, considered specifically from the point-of-view of network-level simulations. We outline models applicable at various system protocol layers of wireless communication systems, which take into account small-scale fading channel environments, and the time-variant error behavior relevant for mobile receivers. The presented models can be utilized...
Collision mitigation is one of classical research issues for wireless local area networks (WLANs). Recently, multiple-input multiple-output (MIMO) transmission techniques have been widely deployed in wireless systems, while a multi-user MIMO-based collision mitigation scheme in uplink WLANs was proposed by authors, and we showed the scheme is very efficient for the uplink performance. However, for...
Multiple-input multiple-output (MIMO) systems are a promising candidate for future wireless communications systems. It is the radio propagation channel that determines crucially the characteristics of the entire MIMO system. Therefore, accurate modeling of MIMO channels is an important requisite for MIMO system design, simulation, and deployment. Moreover, the multidimensional statistical behaviour...
The need for accurately characterizing the spatial domain of the wireless channel has become increasingly important with the growing use of wireless technology. To facilitate the development of signaling strategies and Multiple-Input Multiple-Output (MIMO) system architectures, many different channel modeling strategies have been employed. When it is desirable to create many different channel matrix...
It is well known that orthogonal frequency division multiplexing (OFDM) produces high peak to average power ratio (PAPR) and is highly sensitive to both frequency offset and phase noise. The high peak signal often forces practical amplifiers to operate in the nonlinear region. As a result, it causes additional degradation to the systempsilas performance. Since the frequency bandwidth is a scarce resource,...
Cross-polarized antenna systems are used to reduce equipment size in MIMO systems while still achieving low inter-antenna correlation. One fundamental parameter of cross-polarized MIMO systems is the cross-polar discrimination (XPD). This paper proposes a model to determine the XPD as a function of channel condition and under different antenna configurations. The environment is supposed to have a...
The standard IEEE 802.16 was originally conceived for targeting local and metropolitan area networks, for relatively small link distances. However, the significant deployment of novel wireless-based applications as well as the availability of advanced transmission techniques has suggested a possible extension of the standard-based systems to mountainous and isolated areas. From the propagation point...
This paper proposes a closed-form expression for the correlation coefficient and the cross-polarization discrimination (XPD) of a randomly oriented dual- or tri-polarized MIMO system. The environment is supposed to have a truncated Laplacian power azimuth spectrum that is widely used in standardization bodies. correlation and XPD are shown to be highly sensitive to receiver orientation, azimuth spread...
This paper investigates the capabilities of analytical MIMO channel models in correctly capturing the underlying correlation structure of geometrically-based channel structures. The limitations and performance differences of two correlation-based analytical models, the Kronecker model and a structured eigenbasis model are examined. Additional insight into the limitations of using either model in accurately...
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