The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Mirrored Aperture Synthesis (MAS) was proposed to improve spatial resolution with fewer antennas for passive microwave remote sensing. In this paper, an Experiment System of MAS (ESMAS) at 36.4GHz is introduced, which is designed for verifying the principle and performance of MAS. ESMAS is composed of an antenna array, four reflectors, a receiving channel array, a synchronous acquisition subsystem,...
Global Navigation Satellite System Reflectometry (GNSS-R) was regarded as a promising way to observe atmospheric duct by utilizing low elevation angle ocean surface reflected signals. To invest the Delay maps' feature of low elevation angle reflected signals in the atmospheric duct, a shipborne GNSS-R campaign was conducted in July, 2015 by the scientific investigation ship called Shiyan 3 on the...
In this work, we study the application of analog Joint Source Channel Coding (JSCC) techniques for the transmission of correlated information over fading Multiple Access Channels (MACs) using multiple receive antennas. We consider the distributed encoding of the user information with two different analog JSCC schemes: module-like mappings and uncoded transmission. We evaluate the performance of these...
The performance of a multiple-input-multiple-output (MIMO) system employing circularly polarized (CP) antennas are addressed in the case of indoor propagations. In particular, the comparison between a MIMO system employing CP antennas with respect to linearly polarized (LP) ones has been carefully investigated. To this purpose a set of antennas operating in CP or LP has been designed to operate at...
In this paper, we study influences that affect interference immunity of ultra-wideband (UWB) short-pulse radio communication systems and assess the degree of influence by modeling operation of radio communication system in different modes for two types of channels. The approach to modeling the UWB communication system is described.
The channel estimate and carrier frequency offset (CFO) acquisition are two essential bases for multiple-inputmultiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) techniques. In high-mobility scenario, the fast time varying channel and the serious Doppler frequency shift will make the channel tracking and CFO estimation much more challenging. In this paper, the achievable limits...
In this paper, we propose a two-step algorithm that can achieve any tradeoff point between antenna selection complexity and performance for a massive multiple-input multiple-output (M-MIMO) system. The first and second steps target low complexity and high performance, respectively, in the antenna selection. For the first-step antenna selection, we propose a correlation-based best-first selection algorithm...
In this paper, we propose an eigen domain transmission scheme (ETS) to establish reliable and effective communication for multiple-input-multiple-output (MIMO) systems suffering from narrowband interference (NBI). At the transmitter, assuming that the statistical information of the NBI is known, a precoding is developed to divide the channel into multiple subchannels in the eigen domain of the NBI...
In this paper, an effective generalized spatial modulation (GenSM) scheme with transmit antenna grouping is proposed to overcome the performance degradation caused by correlated channels. In the proposed scheme, the transmit antennas are divided into several equal-sized groups, and spatial modulation (SM) is carried out to select one active antenna in each group independently. It is quite different...
An analytical approach for antenna performance evaluation in multiple-input-multiple-output (MIMO) systems is proposed. By considering the elevation angles of the electromagnetic rays at both the base station (BS) and mobile station (MS), a three-dimensional (3D) channel model is introduced. Then the analytical approach which evaluates the effects of antenna configurations on channel capacity and...
The uplink in a cellular network where the base station (BS) and an advanced user equipment (UE) that is not the traditional mobile device is investigated. This is proposed as a method of antenna offloading for the typical UE which suffers from size constraints. The Gram-Schmidt (GS) precoding algorithm is used to design novel precoding solutions when the receiver and transmitter can have a large...
This paper presents a 3-D statistical channel model of the impulse response with small-scale spatially correlated random coefficients for multi-element transmitter and receiver antenna arrays, derived using the physically-based time cluster - spatial lobe (TCSL) clustering scheme. The small-scale properties of multipath amplitudes are modeled based on 28 GHz outdoor millimeter-wave small-scale local...
The advantages of Multiple Input-Multiple Output (MIMO) wireless communication systems are known for more than a decade. The operational mechanism of a 2 × 2 MIMO system generally reminds either having cross-polarised receiver/transmitter multiport antennas in line-of-sight (LOS), or both co/cross-polarised multiport antennas in non-line-of-sight multipath environments [1]. In contrast to the aforementioned...
Large-scale multiple input multiple output (MIMO) has a high spectral and energy efficiency and is considered as the promising technique for future 5G wireless communications. In practice, the accurate knowledge of channel state information (CSI) is of great importance to guarantee the performance of MIMO systems. However, the conventional training sequence (TS) based approaches usually suffer from...
This paper focus on Space-Shift-Keying (SSK) modulation with polarization diversity for multiple-input multiple-output (MIMO) channels. The proposed scheme make use of dual polarized antenna array in SSK-MIMO wireless system to improve the system performance under LOS channel conditions, where high correlation is accounted between the wireless links. The main motivation behind the proposed scheme...
In this paper, we have analyzed the spatial correlation statistics of different antenna polarization setups for uniform linear and circular antenna arrays. We have compared correlation statistics of different MIMO orders. We are motivated to understand pair-by-pair correlation behavior of MIMO channel as it plays a vital role in defining the channel spectral efficiency. We have further evaluated the...
Assuming application of the received signal estimation method at an arbitrary remote location, we evaluate eavesdropping performance against the secret key agreement technique based on radio propagation characteristics. In the technique, key agreement is realized utilizing the locality of multipath fading. The locality can be broken by using the received signal estimation method and the possible range...
Singular-value decomposition (SVD)-based multiple-input multiple-output (MIMO) systems have attracted a lot of attention in the wireless community where the whole MIMO channel is decomposed into a number of unequally weighted independent single-input single-output (SISO) channels. The unequal weighting of the SISO channels has led to intensive research on bit- and power allocation even in MIMO channel...
In this paper, we investigate the performance of the point-to-point multiple-input-multiple-output (MIMO) systems in the presence of a large but finite numbers of antennas at the transmitters and/or receivers. Considering the cases with and without hybrid automatic repeat request (HARQ) feedback, we determine the minimum numbers of the transmit/receive antennas which are required to satisfy different...
A compensation-based user scheduling (CBUS) for multiuser multi-input multi-output (MU-MIMO) systems with delayed feedback channel state information (CSI) is proposed. To cope with the great performance degradation caused by imperfect CSI in the selective transmission/ selective combining (ST/SC) transceiving systems, we propose the CBUS algorithm, which can effectively alleviate the effect of time...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.