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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...
The authors have proposed a method of estimating the location of the receiving terminal by a triangulation technique using DOD information from the multiple transmitters, which is calculated only from the Received Signal Strength Indicator (RSSI). In our previous study, DODs are calculated using four beacon signals, but the number of the antennas for each array is limited to two, which offers insufficient...
This paper proposes a downlink MU-MIMO-OFDM transmission using simple receive antenna selection. In the proposal, base station transmits to users with selected receive antenna per subcarrier to obtain diversity gain. The proposal also decreases computational complexity by narrowing down the number of antenna combination in accordance with correlation value between receive antennas at each user. From...
Multiple Input Multiple Output (MIMO) sensor, which is utilized for intruder detection by channel state information (CSI) in MIMO propagation channel, has been proposed. We have focused on wide range human detection in indoor scenario by applying array antenna with wide element spacing in the horizontal place at transmit and receive antennas. On the other hand, human detection with limited range such...
The need for high data rate is growing since the multimedia applications are gaining popularity which needs high data rate and quality of service. Multiple Input Multiple Output (MIMO) transmission system is one of the most promising approach of the Smart Antenna Technology which uses multiple antennas in the transmitter and the receiver side and is currently followed for high-rate wireless communication[1]...
We characterize third-dimension (3D) of channel measurements based on two dimension channel model with fully-synchronize propagation of first time LTE-A multi-user centralized multiple-input, multiple-output(MU-MIMO) with sixteen transmitter antennas and three users. By exploiting the spatial correlation of signals originating from neighboring receiving antennas, there is a need for an accurate and...
In this paper, a novel impulsive noise (IN) cancel- lation scheme based on structured compressed sensing (SCS) for multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) power line communication systems is proposed. The SCS theory is introduced to IN recovery for the first time in this paper to the best of the authors' knowledge, and the gap of lack of research on the...
Spectrum sensing is one of component in cognitive radio (CR). The sensing algorithm that usually used is the matched filter and the energy detector. Because there is a shortage in energy detector, which is very sensitive to noise power uncertainty. Then formed a new method based on the covariance matrix of the received signal. In this paper analysis on cognitive radio spectrum sensing using signal...
Currently the research of multi-user MIMO system mainly focuses on the analysis of channel capacity. Low complexity is also attractive to the implementation of a receiver, and thus interference cancellation decoding is often adopted in practice. Partial Interference Cancellation (PIC) group decoding is one effective decoding algorithm for point-to-point MIMO systems which addressing the complexity...
The large number of analog received signals to be processed in massive MIMO systems renders conventional high-precision analog-to-digital conversion (ADC) not feasible in terms of cost- and power-efficiency. In this paper we present a novel ADC architecture inspired by the principles of integer-forcing source coding, which jointly reconstructs the received signals in the digital domain. This scheme...
Consider a two-user MIMO Gaussian Broadcast Channel with two antennas at the transmitter and two single-antenna receivers. While Dirty Paper Coding (DPC) achieves capacity, its practical adoption needs a precise comparison with the popular method of Zero Forcing Beam Forming (ZFBF). In this work, we obtain a simplified expression for the exact difference in sum rate between DPC and ZFBF at all SNRs...
An expression of correlation function of channel coefficients when one-ring scattering model is derived. Based on the correlation function a recursive model of channel coefficients is obtained. A nonrecursive algorithm of channel filtration is derived with Wiener filtration theory.
This paper presents capacity calculations for different MIMO antenna systems. The capacity calculations are applied for a new proposed channel model entitled the spherical model. The presented MIMO antenna systems are consisted of two configurations. Each configuration has four trapezoidal antennas. Configuration I is designed with and without defected ground slot. Configuration II also is designed...
The Direction of Arrival (DOA) algorithms can estimate the incident angles of all the received signals impinging on the array. These algorithms give the DOAs of all the relevant signals of the user sources and interference sources. However, they are not capable of distinguish and identify which one is the direction of the desired user. In this paper, we propose to use a reference signal which is known...
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...
Phased arrays can be used to estimate the direction-of-arrival (DOA) of UHF RFID tags. To save on energy consumption and hardware costs, in this paper we explore the possibility of using single bit analog-to-digital converters for our phased array setup. This setup consists of an off-the-shelf Impinj R2000 reader and a custom phased array with 4 receiving channels. The proposed system quantizes the...
This paper presents a cyclic autocorrelation function (CAF) diversity combining technique for spectrum sensing using test statistics shared among multiple receive antennas with time-averaged weights. We recently reported a weighted CAF diversity combining technique, however, the weight factor has a noise component, which negatively affects the performance. This technique reduces the noise component...
In this paper, we present a new detector for cognitive radio system based on the Canonical Correlation Significance Test (CCST). Unlike existing CCST approaches, which can only be applied on Multi-Antenna System (MAS), our algorithm can be extended for both Single Antenna System (SAS) and MAS. For SAS, the proposed algorithm exploits the time diversity of cyclostationary signals in order to detect...
The paper presents the results of experimental distribution of encryption keys based on random carrier phase of fading radio signal measured in a multipath environment. The random bits extraction scheme was proposed and tested in practice. The proposed scheme is universal and applicable to measurements digitizing of any observable random variable. Experimental study of spatial correlation of multipath...
The signal or clutter separation in airborne MIMO SAR by the information of the direction-of-departure (DOD) or the direction-of-arrival (DOA) is able to be of benefit to the suppression of the “unwanted” signals. As the signal separation performance after using the blocking matrix algorithm is greatly affected by the estimate deviation of the direction. Moreover, the direction of the “unwanted” signal...
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