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.
In this paper, a novel wireless cooperation scheme with complex-field network coding (CFNC), CFNC-amplify-and-forward (CFNC-AF), is developed for multi-way relay (MWR) communications. In this scheme, orthogonal CFNC vectors and joint signal detection are employed to accomplish information exchange among N(N > 2) user nodes via a helping relay node, and a multi-phase transmission protocol is designed...
We consider a MIMO K-user interference channel with finite alphabet signaling, and design an optimal precoder for maximizing the sum mutual information between all transmitter-receiver pairs. Perfect channel knowledge is assumed to be available at all the transmitters, but, decoding of the interfering signals is not done at any receiver. A gradient descent algorithm is employed for maximizing the...
Sample covariance matrix (SCM) and its eigenvalue decomposition (EVD) are needed in the conventional subspace based algorithm. Under normal circumstances, the computation burden is really heavy, especially for the estimation of the coherent signals which also needs to use the spatial smooth technology. In this paper, we firstly use the Nyström-Based method to obtain the signal subspace, which results...
This paper investigates the downlink power allocation problem to mitigate the cross- and co-tier interference in the spectrum-sharing two-tier OFDMA femtocell network, which are comprised of macrocells underlaid with femtocells. The problem is formulated as a non-cooperative game with dual-utility. To achieve green radio access, the objective of the utility for each macro BS is to maximize its energy...
Compressive-projection principal component analysis reconstructs vectors from random projections by recovering an approximation to the principal eigenvectors of the principal-component transform. A heuristic for the number of eigenvectors to approximate is developed to provide consistency with the Johnson-Lindenstrauss lemma and the restricted isometry property from compressed-sensing theory. The...
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.