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Recent years have witnessed the emergence and ongoing proliferation of dynamic adaptive streaming over HTTP (DASH1), which reuses web servers with HTTP communication instead of relying on RTP-based media server and promises to be capable of automatically tuning to bandwidth dynamics. The third generation partnership project (3GPP) long term evolution (LTE) has adopted DASH for use in order to realize...
A novel cloud transmission (CTxn) technique is proposed on the basis of the multiple-input multiple-output (MIMO) technique, called MIMO CTxn. Applying a MIMO technique to conventional SISO CTxn provides a very efficient way to support high-date-rate service for delivering local content, even for a negative SINR. Simulation results show that the performance of MIMO CTxn is better than that of SISO...
Bistatic Inverse Forward Scattering Inverse Synthetic Aperture Radar (BFISAR) concept with Digital Video Broadcast-Terrestrial (DVB-T) waveform is discussed. Geometry of BFISAR topology with stationary transmitter, receiver and kinematic of a moving target are described by vector equations. Mathematical model of BFISAR signal based on DVB-T waveform is described. Image reconstruction is applied by...
This paper describes implementation of clutter cancelation technique used in MSPSR system (Multistatic Primary Surveillance Radar) which consists of multiple bistatic combinations of noise radars. Clutter cancelation method for zero-Doppler component suppression is described and demonstrated on real measurement in urban area for one bistatic combination. First MSPSR detections are introduced.
In this paper, we investigate the design of linear precoders for multiple-input multiple-output (MIMO) multiple access channels (MAC). We assume that statistical channel state information (CSI) is available at the transmitters and consider the problem under the practical finite alphabet input assumption. First, we derive an asymptotic (in the large-system limit) weighted sum rate (WSR) expression...
In this paper, the impact of interferers that are not synchronized in frequency is investigated in multi-antenna OFDM systems. Exact closed-form expressions for the outage probabilities are derived for two spatial linear receivers: the matched-filter (MF) receiver and the linear minimum-mean-square-error (LMMSE) receiver, assuming correlated frequency-selective Rayleigh fading channels and carrier...
Mobile devices or sensor nodes are usually energy-constrained, and in some scenarios it is inconvenient or impractical to charge or replace batteries. To tackle this problem, the idea of transferring power to mobile devices wirelessly via radio frequency signals has recently gained much attention. In this paper, we consider a point-to-point communication system in which the transferred power is used...
Recent advances in microwave technology and signal processing have unveiled the potential of the so-called wireless power transfer (WPT) from one device to the other. This has resulted in reducing the need of a local power source at the wireless devices. In this paper, we target a popular physical layer technology, namely the orthogonal frequency division multiplexing (OFDM) and propose a novel approach...
The MAC-BC duality of information theory and wireless communications is an intriguing concept for efficient algorithm design. However, no concept is known so far for the important cellular channel. To make progress on this front, we consider in this paper the linear deterministic cellular channel. In particular, we prove duality of a network with two interfering MACs in each cell and a network with...
This paper considers downlink multicast transmit beamforming for secure layered transmission systems with wireless simultaneous information and power transfer. We study the power allocation algorithm design for minimizing the total transmit power in the presence of passive eavesdroppers and energy harvesting receivers. The algorithm design is formulated as a non-convex optimization problem. Our problem...
The increase of antennas can greatly improve the performance of MIMO systems, in the meanwhile, the precise channel state information is difficult to obtain since the channel matrix of massive MIMO is much more complex than the traditional one. In this paper, we propose a limited feedback strategy named hybrid limited feedback with selective eigenvalue information (HLFSEI), which jointly considers...
In this paper, we consider the diversity order achievable in a Rayleigh fading Multi-User (MU)-MIMO system when CSI is available at the transmitter (CSIT), but not at the receiver (CSIR). Such a scenario is relevant, for example, in Time Division Duplex (TDD) communications, where, due to channel reciprocity, CSIT can be acquired directly by sending a known training sequence from the receiver to the...
Linear precoding exploits the spatial degrees of freedom offered by multi-antenna transmitters to serve multiple users over the same frequency resources. The present work focuses on simultaneously serving multiple groups of users, each with its own channel, by transmitting a stream of common symbols to each group. This scenario is known as physical layer multicasting to multiple co-channel groups...
We study the Gaussian many-to-one interference network which is a special case of general interference network, where only one receiver experiences interference. We allow transmission of messages on all the links of the network. This communication model is different from the corresponding many-to-one interference channel. We formulate three transmission strategies for the above network, which involve...
This paper investigates the performance of a cooperative downlink (DL) multi-carrier code division multiple access (MC-CDMA) system, where each of the K user's mobile station (MS) is supported by a group of MSs acting as relays in order to achieve the relay diversity. In a cooperative DL communication, multi-user interference (MUI) at the relays precludes the achievement of the relay diversity. In...
Securing communication against non-colluding passive eavesdroppers has been extensively studied. Colluding eavesdroppers were considered for interference-limited large networks. However, collusion was not investigated for large cooperative networks. This paper closes this gap: we study the improvement the eavesdroppers achieve due to collusion in terms of the information leakage rate in a large cooperative...
We consider the joint minimization of queueing cost and power consumption in a wireless network, over all power control policies at the transmitters. Approximately optimal policies are derived through the use of a comparison to a single link system offering lower bounds for both performance metrics. The derived policies are of a simple form: the total power consumed at any instant is a monotonic function...
Multistatic Velocity Backprojection (MVBP) is a technique for visualizing multistatic radar data using bistatic range and Doppler information and facilitates the localization of moving targets in a common reference frame. In this paper simulated and experimental passive multistatic radar data are processed using either traditional range-Doppler processing or, in the case of velocity ambiguous targets...
MIMO radar is a promising concept and many theoretical studies have demonstrated its interest, especially for possible improvements in term of target detection and localization. The colored transmission makes it possible to extract each waveform and form the transmission beam by digital processing on the reception side. One strong limitation of this technique is that waveforms cannot be perfectly...
In this work, we propose a transceiver strategy with switched preprocessing (SP) for interference suppression in K-pair multiple-input multiple-output (MIMO) interference channels. Each transmitter is equipped with a codebook of permutation matrices. For the given MIMO interference channel, all the combinations of permutation matrices among the transmitters can create a number of parallel transceivers...
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