This paper investigates the degrees of freedom of the interference channel in the presence of a dedicated MIMO relay. The relay is used to manage the interference at the receivers. It is assumed that all nodes including the relay have channel state information only for their own links and that the relay has M ≥ K antennas in a K-user network. We pose the question: What is the benefit of exploit...

cooperative encoders and Channel State Information (CSI) is considered where two different scenarios are investigated: A two-user MAC with common message (MACCM) and a two-user MAC with conferencing encoders (MACCE). For both situations, the two cases where the CSI is known to the encoders either non-causally or causally are studied. Achievable rate regions are established for both discrete mem...

The time scale over which a channel is observed determines whether a deterministic or statistical characterization is appropriate. We show that the channel estimation algorithm of Tsatsanis and Xu and the acquisition algorithm of Sayeed and Aazhang share a common MMSE formulation. They differ only in the assumption of the channel characterization. From this observation we develop a new blind MM...

This paper proposes an interference alignment method with distributed and delayed channel state information at the transmitter (CSIT) for a class of interference networks. The core idea of the proposed method is to align interference signals over time at the unintended receivers in a distributed manner. With the proposed method, trade-off regions between the sum of degrees of freedom (sum-DoF) ...

In this paper, a new proof for the degrees of freedom (DoF) region of the K-user multiple-input multipleoutput (MIMO) broadcast channel (BC) with no channel state information at the transmitter (CSIT) and perfect channel state information at the receivers (CSIR) is provided. Based on this proof, the capacity region of a certain class of MIMO BC with channel distribution information at the trans...

In this paper, we analyze the mutual information of sensor networks in an underwater wireless communication system by placing the acoustic sensor nodes at different location in order to achieve optimum mutual information. The performances of acoustic sensors nodes are observed and analyzed by placing the sensors in collaborative and parallel channel network system. Different numerical calculati...

This paper proposes an interference alignment method with distributed and delayed channel state information at the transmitter (CSIT) for a class of interference networks. The core idea of the proposed method is to align interference signals over time at the unintended receivers in a distributed manner. With the proposed method, achievable trade-offs between the sum of degrees of freedom (sum-D...

To hide data in credentials is a key problem in information security. In this paper, a summary of the work on data hiding-capacity is made and several communication channel models and several statistical host data models have been considered by the application of information theory. Based on the foundation, a solution is given to the problem about how many bits can be hidden in host data transp...

Because of the prospect of low cost and high integration of scaled CMOS, much effort is being focused on its use for Radio-Frequency (RF) communication circuits. Low Noise Amplifiers (LNA) are essential building blocks for the design of communication systems, and some applications would benefit from the use of low cost CMOS transistor technology to build the LNA. MOS transistors are typically c...