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We consider a signaling format where information is modulated via a superposition of independent data streams. Each data stream is formed by replication and permutation of encoded information bits. The relations between data bits and modulation symbols transmitted over the channel can be represented in the form of a sparse graph. The modulated streams are transmitted with time offsets enabling spatial...
Time-varying phase synchrony is an important bivariate measure that quantifies both linear and nonlinear dynamics between non-stationary signals. Recently, multivariate phase synchronization has been proposed to investigate the interactions within a group of oscillators. However, current approaches are limited to either averaging all pairwise synchrony values, which causes a loss of information, or...
We consider cooperating base station systems where the users are not aligned in time and frequency to the core network as it is actually desired for coherent joint signal processing. As it is widely known, time and frequency offsets can cause inter-symbol as well as inter-carrier interference in OFDM systems which leads to a reduced transmission performance. In this paper we investigate uplink joint...
This paper investigates pricing mechanisms for utility maximization in interference coupled systems. An axiomatic framework of interference functions similar to the one proposed by Yates is utilized to capture interference coupling in wireless systems. Pricing mechanisms are used as a design tool to shift the solution outcome of a utility maximization problem to a desired point in the region. The...
Due to the increasing interest in mobile/wireless communication, there has been a continuous research in antenna diversity to combat fading. And the model of correlated and unbalanced diversity branches reflects the real-world scenario. The diagonalizer is introduced here before the diversity branches are combined, which can transform the correlated and balanced branches to the uncorrelated and unbalanced...
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