Device or node localization is one of the important issues to be resolved in 5G Utra-Dense network. Accurate measurement techniques using conventional Time of Arrival (ToA), Time Difference of Arrival (TDoA), Angle of Arrival (AoA) and Received Signal Strength Indicator (RSSI) can be adopted to enhance localization accuracy. However, with the introduction of MIMO to increase spectral efficiency...

1 The purpose of this paper is to study how the different propagation environments as well as antenna configurations impact on the performances of space-time block coded (STBC) MIMO systems. Based on the geometrical differences such as one-ring model and elliptical model with different distributions of scatters, the comparisons on system performances are presented here. The impacts of the mean ...

This paper proposes a new low complexity angle of arrival (AOA) method for signal direction estimation in multi-element smart wireless communication systems. The new method estimates the AOAs of the received signals directly from the received signals with significantly reduced complexity since it does not need to construct the correlation matrix, invert the matrix or apply eigen-decomposition, ...

This paper presents an angle-of-arrival (AOA) measurement system based on microwave photonic frequency down conversion. It has the novelty of no LO is needed for conversion process. Instead, a ramp waveform used to shift optical carrier, which phase modulated by signal in subsequent stage. Two low-frequency IF signals are generated after photodetection. The AOA incoming can be determined measur...

The joint communication and sensing (JCAS) technique has drawn great attention due to its high spectrum efficiency by using the same transmit signal for both sensing. Exploiting correlation between uplink (UL) channel results, we propose a sensing-aided Kalman filter (SAKF)-based state information (CSI) estimation method UL JCAS, which exploits angle-of-arrival (AoA) improve CSI accuracy. A (KF...

A wireless sensor network (WSN) consists of spatially distributed autonomous devices using sensors connected via a wireless link. Sensors may be designed for pressure, temperature, sound, vibration, motion... Initially WSN were developed for military applications (battlefield surveillance). Now, many civilian applications (environment monitoring, home automation, traffic control) may take advan...

The aim of this paper is to present a new indoor localization approach by employing the Angle-of-arrival (AOA) and Received Signal Strength (RSS) measurements in Wi-Fi network. To achieve this goal, we first collect the Channel State Information (CSI) by using the commodity Wi-Fi devices with our designed three antennas to estimate the AOA of Wi-Fi signal. Second, we propose a direct path ident...

In this paper, a method for sensor placement to improve the placement quality based on angle of arrival of signal in a specific area is proposed. The installation place of sensors may be constrained with specified boundaries. In this method, the criterion of maximum quality of placement is the Cramer-Rao bound. The generalized pattern search as an effective method is used to maximize error boun...

Radio orbital angular momentum (OAM) communications require accurate alignment between the transmit and receive beam directions. Accordingly, a key feature of OAM receivers is ability to reliably estimate angle arrival (AoA) multi-mode beams. Considering limitations existing AoA estimation techniques, in this paper, we propose an easier-to-implement method based on applying multiple times estim...

For the multiple users communication or multiple target detection, it is important to separate multiple targets or users that are included in the same communication or radar antenna beam. In this paper, a combined OFDM (orthogonal frequency division multiplexing) system and bandpass sampling method using MUSIC (multiple signal classification) algorithm for automatic AOA (angle of arrival) track...