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The objective of this paper is to develop a new detection algorithm for single input multiple output (SIMO) systems, using maximum likelihood (ML) scheme. The proposed method takes into account both channel and carrier frequency offset (CFO) estimation errors for detection of the transmitted data. Simulation results show that the new algorithm improve performance in the presence of multiple estimation...
Data communications through the voice channel of the cellular network are important for telematics applications such as automatic vehicle crash notification, an implementation of which is the pan- European eCall system scheduled for deployment in 2015. The cellular voice channel includes the vocoder which is designed for compressing speech waveforms and is a hindrance for data communications. No mathematical...
Antenna selection provides a practical way to decrease system complexity and the hardware cost of radio frequency (RF) chains in MIMO system. In this paper, We propose an antenna selection scheme in the regenerative MIMO relaying scenario,which can achieve full diversity order of MIMO single relay network, and derive the diversity-multiplexing tradeoff(DMT) performance of the scheme. The algorithm...
A subspace-based blind channel estimation algorithm for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this paper. The proposed algorithm for MIMO-OFDM systems generalizes the conventional repetition index approach, which is only suitable for single-input single-output (SISO)-OFDM systems. Additionally, the necessary conditions of the...
This work addresses scheduling in a cognitive radio scenario where a minimum throughput for the downlink primary network (PN) is guaranteed to each user with an associated violation probability (probability of not obtaining the guaranteed throughput). The primary network is surrounded by multiple downlink secondary networks, each aiming to maximize its network throughput. Scheduling in PN is performed...
For a three-node amplify-and-forward (AF) relay network, we investigate the power allocation problem during the channel training process for the destination to estimate the global channel state information (CSI) of the whole network. Linear minimum-mean-square-error (LMMSE) estimation is adopted. The mean-square-error (MSE) of the channel estimation is analyzed, which shows that the quality of the...
In this paper, we propose an ESPRIT-based parametric prediction scheme for narrowband MIMO systems that fully exploits both temporal and spatial correlations in realistic MIMO channels. The proposed predictor uses a vector transmit spatial signature model and two-dimensional ESPRIT for the estimation of the channel parameters. The proposed scheme outperforms existing algorithms and is well suited...
Networking coding is investigated to improve the throughput of wireless networks without additional resources used. Most of the previous research work focus on the AWGN channel. However, the radio signal is subject to severe fading over wireless channel. In this paper, the network coding outage capacity of two-way system under Rayleigh fading channel is studied by considering all the transmission...
Using differential transmission method, the space-time block codes (STBC) can be applied in a complicated communication environment without channel state information (CSI). However, since the differential calculation includes multiplications, additions and conjugations, differential space-time block codes (DSTBC) also cause constellation expansion and result in nonlinearity problems in a wireless...
As a promising technology to effectively mitigate interference and improve the performance of a wireless communication network, interference alignment (IA) has been attracted extensive concern. In order to solve the problem that perfect IA needs a large number of antennas and facing the cell selection, this paper proposes a partial interference alignment scheme based on user grouping for a network...
We provide results for propagation path loss and root-mean-square delay spread within a parking garage, in the 5 GHz band, aimed at V2V applications. Results for both same-floor, and floor-to-floor propagation are shown for a typical urban parking garage structure. For line-of-sight (LOS) conditions, same-floor propagation path loss is well approximated by a 2-ray model. Same-floor non-LOS path loss...
Two Opportunistic Multi-antenna Relay Selection (OMRS) strategies are proposed and analyzed in Decode-and-Forward (DF) relay networks for cooperative multicast using space time codes, assuming multiple antennas are available at the relay nodes. These two strategies select the best relay based on (i) maximizing the average SNR and (ii) maximizing the minimum SNR respectively. The closed-form expressions...
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