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By combining the polarized modulation and the spatial modulation technique, dual-polarized spatial modulation (DPSM) has been recently proposed for MIMO transmission to improve the spectral efficiency and reduce the space occupancy. The performance of DPSM over correlated Rayleigh and Rice fading channels has been studied, showing that DPSM technique outperforms uni-polarized SM technique. For a general...
The sum rate performance of distributed multiple-input multiple-output (D-MIMO) systems with Zero-Forcing (ZF) receivers over semi-correlated K fading channels involves special functions, which hinders us to further manipulations. To solve this issue, we derive the closed-form expressions of the achievable sum rate by using moment matching method, which is achieved by using a Gamma distribution to...
We study the generalized degrees of freedom (gDoF) of the block-fading noncoherent MIMO channel with asymmetric distributions of link strengths, and a coherence time of T symbol durations. We first derive the optimal signaling structure for communication over this channel, which is distinct from that for the i.i.d MIMO setting. We prove that for T = 1, the gDoF is zero for MIMO channels with arbitrary...
This paper presents a performance analysis of adaptive modulation (AM) schemes in multiple-input multiple-output (MIMO) orthogonal space-time block code (OSTBC) systems over Nakagami-M keyhole channels. We consider a constantpower variable discrete-rate AM strategy and assume that the maximum ratio combining (MRC) technique is used at the receiver. Analytical expressions for the average spectral efficiency...
This paper presents outdoor wideband small-scale spatial fading and autocorrelation measurements and results in the 73 GHz millimeter-wave (mmWave) band conducted in downtown Brooklyn, New York. Both directional and omnidirectional receiver (RX) antennas are studied. Two pairs of transmitter (TX) and RX locations were tested with one line-of-sight (LOS) and one non-line-of-sight (NLOS) environment,...
We investigate non-coherent multi-antenna signal processing which requires no channel state information (CSI) at either transmitter or receiver ends. With non-coherent constellations over Grassmannian manifold, a receiver employing generalized likelihood ratio test (GLRT) algorithm offers the maximum-likelihood performance even without CSI. The conventional GLRT relies on the assumption that the wireless...
The massive MIMO technique has played the most important role in 5G wireless communication. It is anticipated that the new techniques employed in massive MIMO will not only improve peak service data rates significantly, but also enhance capacity, coverage, low-latency, efficiency flexibility, compatibility and convergence, thus meeting the focusing demands imposed by optimal detection. This paper...
This paper presents a multi-group independent sub-channels allocation precoding (MGISAP) algorithm for multi-group space-time coding (MGSTC) systems in correlated high frequency Multiple Input Multiple Output (HF-MIMO) channels. In this algorithm, we jointly consider singular value decomposition (SVD) and optimization of grouping and power allocation to increase the robustness in correlated fading...
For the LTE standard using multiple-input multiple-output (MIMO) radio-access technology, there is a high challenge to evaluate car antennas appropriately, taking into account the antenna environment formed by the car body in the MIMO channel. New statistical methods are required on base of the propagation properties of antennas which are integrated close to each other in a reflecting and refracting...
This paper proposes a normalized belief with the aid of node selection (NS) method in Gaussian belief propagation (GaBP) detection especially for a large multiuser multiple-input multiple-output (MU-MIMO) configurations in bands below 6 GHz. GaBP is known as an efficient detector regarding low computational complexity as well as high detection capability only if the BS has hundreds of receive antennas...
One of the most efficient techniques that is inevitable for the state of the art communication system in today's wireless communication is multiple-input multiple-output (MIMO) technology. MIMO provides robustness against multipath fading using spatial diversity gain, and increases data rate by spatial multiplexing gain. These gains are achieved due to the usage of several antennas. This paper presents...
Large scale multiple-input multiple-output (LS-MIMO) is a relatively new concept which can be used to increase the data rate and throughput of wireless networks. In this paper, performance analysis for LS-MIMO has been carried out for mobile-to-mobile (M2M) communication network over Ν-α-μ fading channels. The orthogonality condition for LS-MIMO over cascaded independent and identically distributed...
In this paper, we investigate the performance of spatial modulation (SM) for vehicle-to- infrastructure (V2I) and vehicle-to-vehicle (V2V) communications over a generalized multiple scattering channel. This channel model provides a realistic statistical description of an intervehicular communication environment and includes as special cases the Rician, Rayleigh, and double-Rayleigh channels. We derive...
Full duplex MIMO communication is one of the key techniques for 5G wireless communication. The main challenge in full duplex operation is the cancellation of the self-interference (SI). In this paper, Transmit Antenna Cancellation technique is considered with symmetric placement of antennas to cancel SI in full duplex MIMO systems. The performance of a full duplex system with this cancellation technique...
Two new non-data-aided (NDA) signal-to-noise ratio (SNR) estimators for multiple antenna systems are presented. The proposed estimators rely on higher- order moments of the received signal and employ the time-diversity of the fading channel. While one requires a priori knowledge about the number of transmit antennas, the other estimates the SNR without such knowledge. The performance of the proposed...
This paper considers distributed massive MIMO networks where a large number of antennas, either collocated or geographically scattered over a region, communicate with mobile users. This communication is impaired by interference from similar transmissions in adjacent regions and by noise. Focusing on zero-forcing (ZF) reception, we derive simple expressions that very accurately approximate the instantaneous...
In this paper, orthogonal space time block coding (OSTBC) in multiple input multiple output (MIMO) systems is employed. The considered channel is the triply selective fading channel (the spatially correlated obeying Kronecker model, time varying and frequency selective). The precoded OSTBC probability of error over triply selective Rayleigh fading channels is investigated for phase shift keying/quadrature-amplitude...
We propose a novel per-tone minimum mean square error (MMSE) receiver for filter-bank multicarrier (FBMC) systems to transmit quadrature amplitude modulation (QAM). To mitigate the residual interference problem, we consider interference channels from the other subcarriers and symbol durations. Simulation results show that the proposed receiver can improve the bit error rate (BER) performance of FBMC...
A Massive MIMO system is equipped with more antennas than traditional MIMO system. Channel modeling for MIMO system has been well studied. However, study for Massive MIMO system channel modeling has just begun. In this paper, we prove the correctness of the spherical wave assumption and the non-stationary properties on both time and array axes. Then, we propose a novel twin-multi-ring channel model...
This paper is concerned with a multiuser uplink massive MIMO system in Ricean flat fading. To avoid the pilot contamination issue, we firstly propose a simple equal gain combining scheme based only on the line-of-sight (LOS) component for a Ricean link in the uplink scenario with a single cell or multiple cells. Then we investigate the power-scaling law for the Ricean link when the transmit power...
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